有时候我们想通过一个值知道这个值来自数据库的哪个表以及哪个字段,通过一个存储过程实现的。只需要传入一个想要查找的值,即可查询出这个值所在的表和字段名。
前提是要将这个存储过程放在所查询的数据库。
CREATE PROCEDURE [dbo].[SP_FindValueInDB] ( @value VARCHAR(1024) ) AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; DECLARE @sql VARCHAR(1024) DECLARE @table VARCHAR(64) DECLARE @column VARCHAR(64) CREATE TABLE #t ( tablename VARCHAR(64), columnname VARCHAR(64) ) DECLARE TABLES CURSOR FOR SELECT o.name, c.name FROM syscolumns c INNER JOIN sysobjects o ON c.id = o.id WHERE o.type = 'U' AND c.xtype IN (167, 175, 231, 239) ORDER BY o.name, c.name OPEN TABLES FETCH NEXT FROM TABLES INTO @table, @column WHILE @@FETCH_STATUS = 0 BEGIN SET @sql = 'IF EXISTS(SELECT NULL FROM [' + @table + '] ' SET @sql = @sql + 'WHERE RTRIM(LTRIM([' + @column + '])) LIKE ''%' + @value + '%'') ' SET @sql = @sql + 'INSERT INTO #t VALUES (''' + @table + ''', ''' SET @sql = @sql + @column + ''')' EXEC(@sql) FETCH NEXT FROM TABLES INTO @table, @column END CLOSE TABLES DEALLOCATE TABLES SELECT * FROM #t DROP TABLE #t End
例如,要查询值'BBQ CHIC SW',结果如下:
返回三条记录,说明这个值存在于三个表中,分别为_dts_menudef, g_dts_menudef和g_recipe中,字段名分别为name1, name1, name。