{"id":5688,"date":"2025-06-02T07:00:00","date_gmt":"2025-06-02T04:00:00","guid":{"rendered":"https:\/\/www.dataplatform.gr\/?p=5688"},"modified":"2025-06-02T11:40:10","modified_gmt":"2025-06-02T08:40:10","slug":"pos-metatrepoyme-mia-vasi-dedomenon-a","status":"publish","type":"post","link":"https:\/\/www.dataplatform.gr\/en\/post-metatrepoyme-mia-vasi-dedomenon-a\/","title":{"rendered":"How to convert a database from Physical Standby to Logical Standby in Oracle Data Guard"},"content":{"rendered":"<p>To another <a href=\"https:\/\/www.dataplatform.gr\/en\/pos-kanoyme-egkatastasi-to-oracle-data-guard-os-physical-standby-g\/\">article<\/a> we have seen how to install <strong>Oracle Data Guard<\/strong>, how to create a database as Physical Standby and how as Snapshot Standby. In this article we will see how to convert a database that is a physical standby to <strong>Logical Standby<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">But what does a logical standby offer us?<\/h2>\n\n\n\n<p>Unlike physical standby, replication is not done at the block level but with <strong>transfer of SQL statements<\/strong>, we can <strong>to have it open for read\/write<\/strong>, we can <strong>to create indexes and materialized views<\/strong>, we can use it for reporting and for <strong>to upgrade<\/strong> the Oracle Database version with almost zero downtime.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to convert a physical standby to a logical standby<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">In primary school<\/h4>\n\n\n\n<p>To begin with, we connect to <strong>primary <\/strong>and we check that we have compatible data types and we can convert the database to Logical Standby, the following query should not return any records:<\/p>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>sqlplus \/ as sysdba<\/code><\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">select * from dba_logstdby_unsupported;<\/pre>\n\n\n\n<p>Then we connect to the Data Guard Broker, check the state of the databases and disable apply on the database that we will convert:<\/p>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>dgmgrl \"sys\/Kwdikos1!\"@ORADEV<\/code><\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">show configuration;<\/pre>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>Configuration - dg_config\n\n  Protection Mode: MaxAvailability\n  Members:\n  oradev    - Primary database\n    oradevdr  - Physical standby database\n    oradevdr3 - Physical standby database\n\n\nFast-Start Failover:  Disabled\n\nConfiguration Status:\nSUCCESS   (status updated 5 seconds ago)\n<\/code><\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">edit database oradevdr3 set state=apply-off;\nexit;<\/pre>\n\n\n\n<p>Then we activate the <strong>supplementary logging<\/strong> in primary:<\/p>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>sqlplus \/ as sysdba\n<\/code><\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;<\/pre>\n\n\n\n<p>And after activating it, we create it <strong>data dictionary<\/strong> for Logical Standby:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">exec dbms_logstdby.build;\nexit;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">On standby<\/h4>\n\n\n\n<p>We shutdown the database and start it in <strong>exclusive mode<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>sqlplus \/ as sysdba<\/code><\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">shutdown immediate;\nstartup mount exclusive;<\/pre>\n\n\n\n<p>We convert the standby database to a Logical Standby:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">alter database recover to logical standby oradev;<\/pre>\n\n\n\n<p>Then we restart the database in <strong>open mode<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">shutdown immediate;\nstartup mount;\nalter database open resetlogs;<\/pre>\n\n\n\n<p>Then we can enable Logical Standby:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">alter database start logical standby apply immediate;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">In primary school<\/h4>\n\n\n\n<p>At this point we need to remove the database from the Data Guard configuration and add it back through the Broker:<\/p>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>dgmgrl \"sys\/Kwdikos1!\"@ORADEV<\/code><\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">remove database oradevdr3;\n\nadd database oradevdr3 as connect identifier is oradevdr3;\n\nenable database oradevdr3;<\/pre>\n\n\n\n<p>Somewhere here we are finished and if we look at the configuration status we will see that the conversion to Logical Standby has been completed:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">show configuration;<\/pre>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>Configuration - dg_config\n\n  Protection Mode: MaxAvailability\n  Members:\n  oradev    - Primary database\n    oradevdr  - Physical standby database\n    oradevdr3 - Logical standby database\n\n\nFast-Start Failover:  Disabled\n\nConfiguration Status:\nSUCCESS   (status updated 5 seconds ago)<\/code><\/pre>\n\n\n\n<p>To see the progress of SQL Apply in Logical Standby, we run the following query on this database:<\/p>\n\n\n\n<pre class=\"wp-block-code\" data-no-translation=\"\" data-no-auto-translation=\"\"><code>  sqlplus \/ as sysdba<\/code><\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-translation=\"\" data-no-auto-translation=\"\">SELECT name, value FROM v$logstdby_stats;<\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sources:<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/19\/sbydb\/creating-oracle-data-guard-logical-standby.html#GUID-3666CA35-D993-44B6-8D70-A2B8B9EC8B2E\">Creating a Logical Standby Database<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/19\/sbydb\/data-type-ddl-support-on-logical-standby-databases.html#GUID-340BA6D6-74D5-4684-AF39-08890D5CD9D4\">Data Type and DDL Support on a Logical Standby Database<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/19\/sbydb\/introduction-to-oracle-data-guard-concepts.html#GUID-5E73667D-4A56-445E-911F-1E99092DD8D7\">Introduction to Oracle Data Guard<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>In another article we have seen how to install Oracle Data Guard, how to create a database as Physical Standby and how to create a Snapshot Standby. In this article we will see how to convert a database that is a physical standby to a Logical Standby. But what does a logical standby offer us? In contrast to physical [\u2026]<\/p>","protected":false},"author":1,"featured_media":704,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,16],"tags":[67,29,65,5,30,155],"class_list":["post-5688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-databases","category-oracle-db","tag-data-guard","tag-databases","tag-high-availability","tag-oracle-database","tag-rdbms","tag-reporting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard - DataPlatform.gr<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dataplatform.gr\/en\/post-metatrepoyme-mia-vasi-dedomenon-a\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard - DataPlatform.gr\" \/>\n<meta property=\"og:description\" content=\"\u03a3\u03b5 \u03ac\u03bb\u03bb\u03bf \u03ac\u03c1\u03b8\u03c1\u03bf \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 \u03b4\u03b5\u03b9 \u03c0\u03ce\u03c2 \u03ba\u03ac\u03bd\u03bf\u03c5\u03bc\u03b5 \u03b5\u03b3\u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf Oracle Data Guard, \u03c0\u03ce\u03c2 \u03c6\u03c4\u03b9\u03ac\u03c7\u03bd\u03bf\u03c5\u03bc\u03b5 \u03bc\u03af\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c9\u03c2 Physical Standby \u03ba\u03b1\u03b9 \u03c0\u03ce\u03c2 \u03c9\u03c2 Snapshot Standby. \u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03ac\u03c1\u03b8\u03c1\u03bf \u03b8\u03b1 \u03b4\u03bf\u03cd\u03bc\u03b5 \u03c0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03c1\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03af\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 physical standby \u03c3\u03b5 Logical Standby. \u03a4\u03b9 \u03bc\u03b1\u03c2 \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03b5\u03b9 \u03cc\u03bc\u03c9\u03c2 \u03bc\u03af\u03b1 logical standby; \u03a3\u03b5 \u03b1\u03bd\u03c4\u03af\u03b8\u03b5\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b7\u03bd physical [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dataplatform.gr\/en\/post-metatrepoyme-mia-vasi-dedomenon-a\/\" \/>\n<meta property=\"og:site_name\" content=\"DataPlatform.gr\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/dataplatform.gr\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-02T04:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-02T08:40:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_oracle.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Stratos Matzouranis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Stratos Matzouranis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/\"},\"author\":{\"name\":\"Stratos Matzouranis\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#\\\/schema\\\/person\\\/e87bf4fd02b65cb6aa0942f87245bbaf\"},\"headline\":\"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard\",\"datePublished\":\"2025-06-02T04:00:00+00:00\",\"dateModified\":\"2025-06-02T08:40:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/\"},\"wordCount\":107,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.dataplatform.gr\\\/wp-content\\\/uploads\\\/2020\\\/06\\\/dp_oracle.png\",\"keywords\":[\"Data Guard\",\"Databases\",\"High Availability\",\"Oracle Database\",\"RDBMS\",\"Reporting\"],\"articleSection\":[\"Databases\",\"Oracle Database\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/\",\"url\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/\",\"name\":\"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard - DataPlatform.gr\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.dataplatform.gr\\\/wp-content\\\/uploads\\\/2020\\\/06\\\/dp_oracle.png\",\"datePublished\":\"2025-06-02T04:00:00+00:00\",\"dateModified\":\"2025-06-02T08:40:10+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.dataplatform.gr\\\/wp-content\\\/uploads\\\/2020\\\/06\\\/dp_oracle.png\",\"contentUrl\":\"https:\\\/\\\/www.dataplatform.gr\\\/wp-content\\\/uploads\\\/2020\\\/06\\\/dp_oracle.png\",\"width\":1280,\"height\":720},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/pos-metatrepoyme-mia-vasi-dedomenon-a\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u0391\u03c1\u03c7\u03b9\u03ba\u03ae\",\"item\":\"https:\\\/\\\/www.dataplatform.gr\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Databases\",\"item\":\"https:\\\/\\\/www.dataplatform.gr\\\/category\\\/databases\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Oracle Database\",\"item\":\"https:\\\/\\\/www.dataplatform.gr\\\/category\\\/databases\\\/oracle-db\\\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#website\",\"url\":\"https:\\\/\\\/www.dataplatform.gr\\\/\",\"name\":\"dataplatform.gr - Sky is not the limit!\",\"description\":\"\u0398\u03b5\u03c9\u03c1\u03af\u03b1, \u03bf\u03b4\u03b7\u03b3\u03bf\u03af \u03ba\u03b1\u03b9 \u03c3\u03ba\u03ad\u03c8\u03b5\u03b9\u03c2 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03ba\u03ac\u03bd\u03b5\u03c4\u03b5 \u03c4\u03b7 \u03b4\u03bf\u03c5\u03bb\u03b5\u03b9\u03ac \u03c3\u03b1\u03c2 \u03c0\u03b9\u03bf \u03c0\u03b1\u03c1\u03b1\u03b3\u03c9\u03b3\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03c0\u03b9\u03bf \u03b5\u03cd\u03ba\u03bf\u03bb\u03b1 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03b9\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c3\u03c4\u03b7\u03bd SQL, \u03c3\u03c4\u03bf Business Intelligence \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03b3\u03b5\u03bd\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1.\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.dataplatform.gr\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#organization\",\"name\":\"dataplatform.gr\",\"url\":\"https:\\\/\\\/www.dataplatform.gr\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.dataplatform.gr\\\/wp-content\\\/uploads\\\/2020\\\/06\\\/dp_logo_wbacki.png\",\"contentUrl\":\"https:\\\/\\\/www.dataplatform.gr\\\/wp-content\\\/uploads\\\/2020\\\/06\\\/dp_logo_wbacki.png\",\"width\":322,\"height\":139,\"caption\":\"dataplatform.gr\"},\"image\":{\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/dataplatform.gr\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/dataplatform-gr\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.dataplatform.gr\\\/#\\\/schema\\\/person\\\/e87bf4fd02b65cb6aa0942f87245bbaf\",\"name\":\"Stratos Matzouranis\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ab973bc4bd1673c43d45de5633a624d9ad13c06902dfdd5a6e3fd9885903865e?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ab973bc4bd1673c43d45de5633a624d9ad13c06902dfdd5a6e3fd9885903865e?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ab973bc4bd1673c43d45de5633a624d9ad13c06902dfdd5a6e3fd9885903865e?s=96&d=mm&r=g\",\"caption\":\"Stratos Matzouranis\"},\"sameAs\":[\"https:\\\/\\\/www.dataplatform.gr\"],\"url\":\"https:\\\/\\\/www.dataplatform.gr\\\/en\\\/author\\\/stratos-matzouranis\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard - DataPlatform.gr","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.dataplatform.gr\/en\/post-metatrepoyme-mia-vasi-dedomenon-a\/","og_locale":"en_US","og_type":"article","og_title":"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard - DataPlatform.gr","og_description":"\u03a3\u03b5 \u03ac\u03bb\u03bb\u03bf \u03ac\u03c1\u03b8\u03c1\u03bf \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 \u03b4\u03b5\u03b9 \u03c0\u03ce\u03c2 \u03ba\u03ac\u03bd\u03bf\u03c5\u03bc\u03b5 \u03b5\u03b3\u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf Oracle Data Guard, \u03c0\u03ce\u03c2 \u03c6\u03c4\u03b9\u03ac\u03c7\u03bd\u03bf\u03c5\u03bc\u03b5 \u03bc\u03af\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c9\u03c2 Physical Standby \u03ba\u03b1\u03b9 \u03c0\u03ce\u03c2 \u03c9\u03c2 Snapshot Standby. \u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03ac\u03c1\u03b8\u03c1\u03bf \u03b8\u03b1 \u03b4\u03bf\u03cd\u03bc\u03b5 \u03c0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03c1\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03af\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 physical standby \u03c3\u03b5 Logical Standby. \u03a4\u03b9 \u03bc\u03b1\u03c2 \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03b5\u03b9 \u03cc\u03bc\u03c9\u03c2 \u03bc\u03af\u03b1 logical standby; \u03a3\u03b5 \u03b1\u03bd\u03c4\u03af\u03b8\u03b5\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b7\u03bd physical [&hellip;]","og_url":"https:\/\/www.dataplatform.gr\/en\/post-metatrepoyme-mia-vasi-dedomenon-a\/","og_site_name":"DataPlatform.gr","article_publisher":"https:\/\/www.facebook.com\/dataplatform.gr\/","article_published_time":"2025-06-02T04:00:00+00:00","article_modified_time":"2025-06-02T08:40:10+00:00","og_image":[{"width":1280,"height":720,"url":"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_oracle.png","type":"image\/png"}],"author":"Stratos Matzouranis","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Stratos Matzouranis","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#article","isPartOf":{"@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/"},"author":{"name":"Stratos Matzouranis","@id":"https:\/\/www.dataplatform.gr\/#\/schema\/person\/e87bf4fd02b65cb6aa0942f87245bbaf"},"headline":"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard","datePublished":"2025-06-02T04:00:00+00:00","dateModified":"2025-06-02T08:40:10+00:00","mainEntityOfPage":{"@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/"},"wordCount":107,"commentCount":0,"publisher":{"@id":"https:\/\/www.dataplatform.gr\/#organization"},"image":{"@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#primaryimage"},"thumbnailUrl":"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_oracle.png","keywords":["Data Guard","Databases","High Availability","Oracle Database","RDBMS","Reporting"],"articleSection":["Databases","Oracle Database"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/","url":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/","name":"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard - DataPlatform.gr","isPartOf":{"@id":"https:\/\/www.dataplatform.gr\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#primaryimage"},"image":{"@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#primaryimage"},"thumbnailUrl":"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_oracle.png","datePublished":"2025-06-02T04:00:00+00:00","dateModified":"2025-06-02T08:40:10+00:00","breadcrumb":{"@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#primaryimage","url":"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_oracle.png","contentUrl":"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_oracle.png","width":1280,"height":720},{"@type":"BreadcrumbList","@id":"https:\/\/www.dataplatform.gr\/pos-metatrepoyme-mia-vasi-dedomenon-a\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u0391\u03c1\u03c7\u03b9\u03ba\u03ae","item":"https:\/\/www.dataplatform.gr\/"},{"@type":"ListItem","position":2,"name":"Databases","item":"https:\/\/www.dataplatform.gr\/category\/databases\/"},{"@type":"ListItem","position":3,"name":"Oracle Database","item":"https:\/\/www.dataplatform.gr\/category\/databases\/oracle-db\/"},{"@type":"ListItem","position":4,"name":"\u03a0\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b2\u03ac\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03c0\u03cc Physical Standby \u03c3\u03b5 Logical Standby \u03c3\u03b5 Oracle Data Guard"}]},{"@type":"WebSite","@id":"https:\/\/www.dataplatform.gr\/#website","url":"https:\/\/www.dataplatform.gr\/","name":"dataplatform.gr - Sky is not the limit!","description":"\u0398\u03b5\u03c9\u03c1\u03af\u03b1, \u03bf\u03b4\u03b7\u03b3\u03bf\u03af \u03ba\u03b1\u03b9 \u03c3\u03ba\u03ad\u03c8\u03b5\u03b9\u03c2 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03ba\u03ac\u03bd\u03b5\u03c4\u03b5 \u03c4\u03b7 \u03b4\u03bf\u03c5\u03bb\u03b5\u03b9\u03ac \u03c3\u03b1\u03c2 \u03c0\u03b9\u03bf \u03c0\u03b1\u03c1\u03b1\u03b3\u03c9\u03b3\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03c0\u03b9\u03bf \u03b5\u03cd\u03ba\u03bf\u03bb\u03b1 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03b9\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c3\u03c4\u03b7\u03bd SQL, \u03c3\u03c4\u03bf Business Intelligence \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03b3\u03b5\u03bd\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1.","publisher":{"@id":"https:\/\/www.dataplatform.gr\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.dataplatform.gr\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.dataplatform.gr\/#organization","name":"dataplatform.gr","url":"https:\/\/www.dataplatform.gr\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.dataplatform.gr\/#\/schema\/logo\/image\/","url":"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_logo_wbacki.png","contentUrl":"https:\/\/www.dataplatform.gr\/wp-content\/uploads\/2020\/06\/dp_logo_wbacki.png","width":322,"height":139,"caption":"dataplatform.gr"},"image":{"@id":"https:\/\/www.dataplatform.gr\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/dataplatform.gr\/","https:\/\/www.linkedin.com\/company\/dataplatform-gr\/"]},{"@type":"Person","@id":"https:\/\/www.dataplatform.gr\/#\/schema\/person\/e87bf4fd02b65cb6aa0942f87245bbaf","name":"Stratos Matzouranis","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/ab973bc4bd1673c43d45de5633a624d9ad13c06902dfdd5a6e3fd9885903865e?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ab973bc4bd1673c43d45de5633a624d9ad13c06902dfdd5a6e3fd9885903865e?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ab973bc4bd1673c43d45de5633a624d9ad13c06902dfdd5a6e3fd9885903865e?s=96&d=mm&r=g","caption":"Stratos Matzouranis"},"sameAs":["https:\/\/www.dataplatform.gr"],"url":"https:\/\/www.dataplatform.gr\/en\/author\/stratos-matzouranis\/"}]}},"_links":{"self":[{"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/posts\/5688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/comments?post=5688"}],"version-history":[{"count":4,"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/posts\/5688\/revisions"}],"predecessor-version":[{"id":5694,"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/posts\/5688\/revisions\/5694"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/media\/704"}],"wp:attachment":[{"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/media?parent=5688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/categories?post=5688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dataplatform.gr\/en\/wp-json\/wp\/v2\/tags?post=5688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}