What is ALTER TABLE command?

Question

The SQL ALTER TABLE command is used to add, delete or modify columns in an existing table. You should also use the ALTER TABLE command to add and drop various constraints on an existing table.

What do you mean by ALTER TABLE command?

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.

What is basic of Alter command?

The SQL ALTER TABLE command is used to modify the definition (structure) of a table by modifying the definition of its columns.

What does the ALTER TABLE cause do?

ALTER TABLE changes the structure of a table. For example, you can add or delete columns, create or destroy indexes, change the type of existing columns, or rename columns or the table itself. You can also change characteristics such as the storage engine used for the table or the table comment.

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