10 2018 档案
摘要:IF exists (select * from syscolumns where name='字段名' and id=object_id('表名')) begin select '已存在,不需添加!' end ELSE begin ALTER TABLE dbo.表名 add 字段名 VARCHAR(36) EXEC sys.sp_addextendedprope...
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摘要:IF NOT EXISTS ( SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[表名]') AND OBJECTPROPERTY(id, N'IsUserTable') = 1 ) begin SELECT '不存在...
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