操作兩個表的SQL語句，可用在數據源中

SELECT *,     (SELECT COUNT(*)
         FROM artwork b
         WHERE a.zgid = b.zgid
         GROUP BY b.zgid) AS 作品數,
         

        (SELECT COUNT(*)
         FROM projects c
         WHERE a.zgid = c.zgid
         GROUP BY c.zgid) AS 課題數,
       

        (SELECT COUNT(*)
         FROM paperbook d
         WHERE a.zgid = d.zgid
         GROUP BY d.zgid) AS 論文數

FROM users a where (dept = @dept)">

 

上面的語句操作了四個數據表，用zgid作關聯。可以用在sqldatasource裏面。綁定到一個GRIDVIEW中。這樣在一個GRIDVIEW中就可以顯示多個表中的數據了。