SQLServer缺省约束⽰例缺省约束缺省约束经过定义列的缺省value或应⽤数据库的缺省value对象绑定表的列,来指定列的缺省value。SQL Server 推荐应⽤缺省约束,⽽不应⽤定义缺省value的⽅法来指定列的缺省value。有关绑定缺省约束的窍门请参见“数据完整性”章节。定义缺省约束的语⾔规则如下:CONSTRAINT constraint_titleDEFAULT constan
In October 2003, the first Chinese citizen saw his homeland from outer space and the mythology and dreams of thousands of years became a reality. Our songs of how the earth is our garden and our pride