Difference between revisions of "INDEX Table Constraint"

Revision as of 15:13, 29 October 2009

Purpose

Table constraint to define an index key

Syntax

INDEX [<cTagName>] (column1[, column2,...])

See Also

ALTER TABLE, CONSTRAINTS, CREATE TABLE

Description

A constraint is used to define rules that help to provide data integrity. TABLE constraints apply to table-based operations. You must have ALTER privilege on the table. The table will be locked for EXCLUSIVE use during the operation.

The INDEX table constraint is used to define an index key. The index is built on the column or columns specified and given the name as defined in <cTagName>. The KEY table constraint can be used in the same way.

Example

set sql to mysql
CREATE TABLE contact (LastName char(25), FirstName char(25),
INDEX FullName (LastName, FirstName));

Products

Recital Database Server, Recital Mirage Server, Recital Terminal Developer