Contribute to lishihao007/pingcap development by creating an account on GitHub.

-- The ALTER TABLE statement is used to add, delete, or modify columns in an existing table. -- The ALTER TABLE statement is also used to add and drop various constraints on an existing table. -- ...

See CASE expression for a description of CASE expressions. To add, drop, or modify a column's definition or attributes, use the ALTER TABLE statement, described in ALTER TABLE Statement . In the SET ...

You create a CLOB in Oracle through the database's Structured Query Language, or SQL. Using SQL's "ALTER TABLE" statement, you add a CLOB data item to an existing table in your business' database.