Sql_Server中怎么判断表中某列是否存在
Sql_Server中如何判断表中某列是否存在
/*判断表AA中是否存在AA_ID这一列，如果不存在，则新增*/ IF NOT EXISTS (SELECT 1 FROM syscolumns INNER JOIN sysobjects ON sysobjects.id = syscolumns.id WHERE syscolumns.name = 'AA_ID' AND sysobjects.name = 'AA') ALTER TABLE AA ADD AA_ID VARCHAR(30) NULL GO