Difference between revisions of "RANGE Column Constraint"
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Revision as of 17:10, 8 December 2009
Purpose
Column constraint to specify minimum and maximum values for a date or numerical column
Syntax
RANGE <expr1>,<expr2>
See Also
ALTER TABLE, CONSTRAINTS, CREATE TABLE
Description
A constraint is used to define rules that help to provide data integrity. Column constraints are specific to the column name specified. You must have ALTER privilege on the table. The table will be locked for EXCLUSIVE use during the operation.
The RANGE column constraint is used to specify minimum and maximum values for a date or numerical column. The minimum value is specified in <expr1>, the maximum in <expr2>. Attempting to update the column with a value outside this range generates an error.
Example
set sql to recital CREATE TABLE orderhead (ord_week INT RANGE 1,52 , ord_date DATE RANGE date(),gomonth(date(),12));
Products
Recital, Recital Server
