{"id":56312,"date":"2024-06-23T08:41:31","date_gmt":"2024-06-23T08:41:31","guid":{"rendered":"https:\/\/dbtut.com\/?p=56312"},"modified":"2024-06-23T08:44:30","modified_gmt":"2024-06-23T08:44:30","slug":"table-move-and-shrink","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2024\/06\/23\/table-move-and-shrink\/","title":{"rendered":"Table Move And Shrink"},"content":{"rendered":"

In this article, we will discuss in detail the table Move processes and how Shrink operations are performed.<\/p>\n

Sometimes we may need to move a table to another tablespace. For example, we may want to do Shrink operation.<\/p>\n

However, in order to perform the shrink operation, the “SEGMENT SPACE MANAGEMENT” value of the table must be AUTO.<\/p>\n

Therefore, the table can be moved to another tablespace whose “SEGMENT SPACE MANAGEMENT” value is AUTO.<\/p>\n

For example, in order to shrink a table, the steps to be done in the table are as follows.<\/p>\n

1. Row moving is activated in the table.<\/p>\n

SQL> ALTER TABLE ACCOUNT ENABLE ROW MOVEMENT;\r\n\t\r\nTable altered.\r\n<\/pre>\n
2. Shrink is desired.<\/p>\n
SQL> ALTER TABLE ACCOUNT SHRINK SPACE;\r\nALTER TABLE ACCOUNT SHRINK SPACE\r\n*\r\nERROR at line 1:\r\nORA-10635: Invalid segment or tablespace type<\/pre>\n
3. The “SEGMENT SPACE MANAGEMENT” value of the table is learned.<\/p>\n
SQL> SELECT TBS.SEGMENT_SPACE_MANAGEMENT FROM DBA_TABLES T, DBA_TABLESPACES TBS WHERE T.TABLESPACE_NAME=TBS.TABLESPACE_NAME AND \r\nT.OWNER='SYS' AND T.TABLE_NAME='ACCOUNT';\r\n\t\r\nSEGMEN\r\n------\r\nMANUAL\r\n<\/pre>\n
4. Since it is manual, the table is moved to another tablespace.<\/p>\n
SQL> ALTER TABLE ACCOUNT MOVE TABLESPACE USERS;\r\n\t\r\nTable altered.<\/pre>\n
5. The “SEGMENT SPACE MANAGEMENT” value is learned again.<\/p>\n
SQL> SELECT TBS.SEGMENT_SPACE_MANAGEMENT FROM DBA_TABLES T, DBA_TABLESPACES TBS WHERE T.TABLESPACE_NAME=TBS.TABLESPACE_NAME AND \r\nT.OWNER='SYS' AND T.TABLE_NAME='ACCOUNT';\r\n\t\r\nSEGMEN\r\n------\r\nAUTO\r\n<\/pre>\n
6. We do the shrink process.<\/p>\n
SQL> ALTER TABLE ACCOUNT SHRINK SPACE;\r\n\t\r\nTable altered.\r\n<\/pre>\n
We can also narrow down the index segments used by the table by using the word “CASCADE”.<\/p>\n
SQL> ALTER TABLE ACCOUNT SHRINK SPACE CASCADE;\r\n\t\r\nTable altered.\r\n<\/pre>\n
If we do not want the table’s “High-Water Mark” to be readjusted,<\/p>\n
SQL> ALTER TABLE ACCOUNT SHRINK SPACE COMPACT;\r\n\t\r\nTable altered.<\/pre>\n
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In this article, we will discuss in detail the table Move processes and how Shrink operations are performed. Sometimes we may need to move a table to another tablespace. For example, we may want to do Shrink operation. However, in order to perform the shrink operation, the “SEGMENT SPACE MANAGEMENT” value of the table must …<\/p>\n
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<\/div>\n","protected":false},"author":484,"featured_media":56313,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-56312","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-oracle"],"aioseo_notices":[],"yoast_head":"\nTable Move And Shrink - Database Tutorials<\/title>\n<meta name=\"description\" content=\"In this article, we will discuss in detail the table Move processes and how Shrink operations are performed.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dbtut.com\/index.php\/2024\/06\/23\/table-move-and-shrink\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Table Move And Shrink - 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