这个标题写的真是太直白了……
有时候我们知道一个值,但是不知道这个值在库里边的那个表中,是哪个字段,可以用以下的语句来进行查询,比如我们查询“张三”在那个表的那个字段:
DECLARE @cloumns VARCHAR(40);
DECLARE @tablename VARCHAR(40);
DECLARE @str VARCHAR(40);
DECLARE @counts INT;
DECLARE @sql NVARCHAR(2000);
DECLARE MyCursor CURSOR FOR
SELECT a.name AS Columns,
b.name AS TableName
FROM syscolumns a,
sysobjects b,
systypes c
WHERE a.id = b.id
AND b.type = 'U'
AND a.xtype = c.xtype
AND c.name LIKE '%char%';
SET @str = '张三';
OPEN MyCursor;
FETCH NEXT FROM MyCursor
INTO @cloumns,
@tablename;
WHILE (@@Fetch_Status = 0)
BEGIN
SET @sql = N'select @tmp_counts=count(*) from ' + @tablename + N' where ' + @cloumns + N' = ''' + @str + N'''';
EXECUTE sp_executesql @sql, N'@tmp_counts int out', @counts OUT;
IF @counts > 0
BEGIN
PRINT '表名为:' + @tablename + ',字段名为' + @cloumns;
END;
FETCH NEXT FROM MyCursor
INTO @cloumns,
@tablename;
END;
CLOSE MyCursor;
DEALLOCATE MyCursor;
结果: