Αποτελέσματα Αναζήτησης
You can use the RENAME statement to rename an existing table. To rename columns, use the ALTER TABLE statement.
RENAME TABLE invalidates any packages that are dependent on the source table. RENAME INDEX invalidates any packages that are dependent on the source index. If an alias is used for the source-table-name, it must resolve to a table name. The table is renamed within the schema of this table.
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 )
if you want to rename a table in the same schema, you can use like this. RENAME TABLE schema.table_name TO "new_table_name"; Otherwise, you can use tools like DBeaver to rename or copy tables in a db2 db.
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:
Syntax Comparison: SQL Server vs MySQL. While conceptually similar, actual alter table syntax does vary across database engines. SQL Server: ADD column_name data_type. | DROP COLUMN column_name. | ALTER COLUMN column_name data_type. MySQL: ADD COLUMN column_name data_type. | CHANGE COLUMN old_name new_name data_type.
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.
