SQL Server根据值内容查询表和列名字

Author： Kim
发布时间：November 13, 2023
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1077 words
Categories： MSSQL 数据库

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：

```sql
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：

![结果图](https://resource.if010.com/select_SQL_Server_01.png)

Last modification：November 13, 2023