For example there is a column called BookingId (varchar)in a table, and it should start with the value HB100.

Please let me know if it can be done using any check constraint on the column..

Thanks

– Delete any old test table
IF NOT (SELECT OBJECT_ID(‘dbo.MyTestTable’)) IS NULL DROP TABLE MyTestTable
GO
– Create test table
CREATE TABLE dbo.MyTestTable(i INT)
GO
– Insert row
INSERT INTO dbo.MyTestTable SELECT 1
GO
– Following fails because MyTestTable already has a row
– which doesn’t satisfy the check
ALTER TABLE dbo.MyTestTable ADD CONSTRAINT MyTestTable_chk CHECK (i > 1)
GO
– Insert row
– This succeeds because the check above wasn’t
– actually commited because of the error
INSERT INTO dbo.MyTestTable SELECT 1
GO
– Following works because we are saying that
– “don’t check old values’
ALTER TABLE dbo.MyTestTable WITH NOCHECK ADD CONSTRAINT MyTestTable_chk CHECK (i > 1)
GO
– Try to insert row
– This fails because of the check above
INSERT INTO dbo.MyTestTable SELECT 1
GO
– Returns 2 rows
SELECT * FROM dbo.MyTestTable
GO
– Drop test table
DROP dbo.MyTestTable
GO

If there is a FK to the jobs TABLE, add the salary basis column to the FK, then you have it locally and a normal CHECK CONSTRAINT could be used.

Another options would be instead of salary to have salarybasis_modifier, which means that the salary is always at least the salarybasis but it can also be added to in this COLUMN.

i have ‘salary’ for a worker on workers table,
and i want it to be more than ‘salarybasis’ on jobs table

thanks

thanks in advance