I’ve created a script that monitors a table in a SQL Server database. I’m only interested in one column in the table: TimeStamp. If the maximum (newest) value in TimeStamp is more than 30 ...

Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform ... in a foreign key table, those values will be set to NULL when the primary key record ...

clauses IN and EXISTS are interchangeable. However, they’re quite different in how they handle NULL values and may give different results. The problem comes from the fact that, in an Oracle ...