TheALTER TABLEstatement is also used to add and drop various constraints on an existing table. ALTER TABLE - ADD Column To add a column in a table, use the following syntax: ALTERTABLEtable_name ADDcolumn_name datatype; The following SQL adds an "Email" column to the "Customers" table:...
The ALTER TABLE statement allows you to rename an existing table. It can also be used to add, modify, or drop a column from an existing table. //z 2012-08-09 09:36:26 IS2120@.T3277072977[T64,L417,R16,V609] Renaming a table The basic syntax for renaming a table is: ALTER TABLE...
If the statement is dynamically prepared, the privilege set is the union of the privilege sets that are held by each authorization ID and role of the process.Syntax for ALTER TABLE ALTER TABLE table-name 1ADDCOLUMNcolumn-definitionALTERCOLUMNcolumn-alterationRENAME COLUMNsource-column-nameTOtarget-...
If the statement is dynamically prepared, the privilege set is the union of the privilege sets that are held by each authorization ID and role of the process.Syntax for ALTER TABLE ALTER TABLE table-name 1ADDCOLUMNcolumn-definitionALTERCOLUMNcolumn-alterationRENAME COLUMNsource-column-nameTOtarget-...
Syntax #1 To add a column to an existing table, the ALTER TABLE syntax is: ALTER TABLE table_name ADD column_name column-definition; For Example: ALTER TABLE supplier ADD supplier_name varchar2(50); This will add a column calledsupplier_nameto thesuppliertable. ...
See Also: CREATE INDEX for information on the privileges needed to create indexes Syntaxalter_table::= Text description of alter_table Groups of ALTER TABLE syntax: alter_table_clauses::= alter_table_partitioning::= alter_column_clauses::= alter_constraint_clauses::= alter_column_...
ALTER TABLE table_name DROP column_name; For Example: To drop the column "location" from the employee table, the query would be likeALTER TABLE employee DROP location; Syntax to modify a columnALTER TABLE table_name MODIFY column_name datatype; ...
Syntax SQLSyntax ❮ PreviousNext ❯ SQL Statements Most of the actions you need to perform on a database are done with SQL statements. SQL statements consist of keywords that are easy to understand. The following SQL statement returns all records from a table named "Customers":...
Modifies a table definition by altering, adding, or dropping columns and constraints. ALTER TABLE also reassigns and rebuilds partitions, or disables and enables constraints and triggers. Important The syntax for ALTER TABLE is different for disk-based tables and memory-optimized tables. Use the fo...
The FOR RECOVER setting for ALTER TABLESPACE ... OFFLINE has been deprecated. The syntax is supported for backward compatibility. However, users are encouraged to use the transportable tablespaces feature for tablespace recovery.See Also: Oracle9i User-Managed Backup and Recovery Guide for information...