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The RENAME COLUMN clause is an option on the ALTER TABLE statement. You can rename an existing column in a base table to a new name without losing stored data or affecting any privileges or label-based access control (LBAC) policies that are associated with the table.
- Modifying column definitions
Modifying column definitions. Use the ALTER TABLE statement...
- Modifying column definitions
To change the name of an existing table to a new one, you use the RENAME TABLE statement. Here is the syntax of the RENAME TABLE statement: RENAME TABLE table_name TO new_table_name; Code language: SQL (Structured Query Language) (sql) In this syntax:
8 Μαρ 2019 · Use an ALTER TABLE statement. ALTER TABLE G31.TG31PDIX RENAME COLUMN RECORD_KEY TO RECORD_KEYY; This will only work if you use a version of DB2 that supports this feature. An older version might be out of luck. I'm not sure when they added it, but it was after 2004.
The RENAME TABLE statement returns an error if the target table is referenced in a view definition or an SQL table function, unless the RENAMETABLE subsystem parameter is set to ALLOW_DEP_VIEW_SQLTUDF.
Modifying column definitions. Use the ALTER TABLE statement to drop columns, or change their types and attributes. For example, you can increase the length of an existing VARCHAR or VARGRAPHIC column. The number of characters might increase up to a value dependent on the page size used.
Changing column names online using the ALTER TABLE operation To rename a column in earlier versions of DB2, we used to recreate the table with a new column name and then insert the data from the earlier table on to a newly created table.
Db2 ALTER TABLE ALTER COLUMN allows you to modify the definitions of the existing columns in a table. The following illustrates the syntax of the ALTER TABLE ALTER COLUMN statement: ALTER TABLE table_name ALTER COLUMN column_name modification_type; Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of ...
