How can foreign key constraints be temporarily disabled using T-SQL?

Question

Are disabling and enabling foreign key constraints supported in SQL Server? Or is my only option to drop and then re-create

Answer 1

Answer marked '905' looks good but does not work.

Following worked for me. Any Primary Key, Unique Key, or Default constraints CAN NOT be disabled. In fact, if 'sp_helpconstraint '' shows 'n/a' in status_enabled - Means it can NOT be enabled/disabled.

-- To generate script to DISABLE

select 'ALTER TABLE ' + object_name(id) + ' NOCHECK CONSTRAINT [' + object_name(constid) + ']'
from sys.sysconstraints 
where status & 0x4813 = 0x813 order by object_name(id)

-- To generate script to ENABLE

select 'ALTER TABLE ' + object_name(id) + ' CHECK CONSTRAINT [' + object_name(constid) + ']'
from sys.sysconstraints 
where status & 0x4813 = 0x813 order by object_name(id)