Sams Teach Yourself Microsoft SQL Server 7 in 21 Days | Traditional Methods of Integrity | InformIT

Sams Teach Yourself Microsoft SQL Server 7 in 21 Days | Traditional Methods of Integrity | InformIT

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日期:2026-04-25
Defaults Defaults are used to specify a value to add to a column when you don't want to directly insert a value into that column. There are two kinds of defaults in SQL Server: ANSI constraint defaults and standalone objects called defaults. In this secti...看更多