A contrived example: Say we have two types of tools: hammers and wrenches. We have a list of work orders, and we want to track what tool was used for the ...

ALTER TABLE column_constraint specifies the properties of a PRIMARY KEY, FOREIGN KEY, UNIQUE, or CHECK constraint that is part of a new column definition added to a table. Is the name of the ...

You can modify or drop a check constraint in SQL using the ALTER TABLE statement. To modify a check constraint, you need to drop the existing one and create a new one with the updated condition.

Sql constraintsa constraint is a rule or limitation that we place on the data in a database that we can put into a column(s). a constraint is part of the table. we can apply constraints when we create ...

Returns one row for each table constraint in the current database. This information schema view returns information about the objects to which the current user has permissions. To retrieve information ...

Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field in a primary key-foreign key relationship is ...

I've got an interesting constraint I'm trying to add to our database. I can do with with triggers, but am curious if there is a more elegant way to do this in T-SQL (SQL2005, FWIW) We have two ...

Integrity constraints are a Version 7 feature of SAS software for preserving the consistency and correctness of data that is stored in SAS tables. When integrity constraints are assigned to a table, ...

The NSW Irrigators' Council is urging the state government to rule out what it says are 'bad-faith' aspects of its proposed landholder negotiation framework to manage constraints and avoid further ...