referential constraint造句

例句与造句

1. Enforcing referential constraints after relation schema decomposition ( normalization ) requires a new formalism, i . e . inclusion dependencies.
2. SQL Server 2000 also introduced many T-SQL language enhancements, such as table variables, user-defined functions, indexed views, INSTEAD OF triggers, cascading referential constraints and some basic XML support.
3. It's difficult to find referential constraint in a sentence. 用referential constraint造句挺难的