SQL Server中的SQL子查詢

Question

第一個表是pre ，第二個表是tran 。 我想S_SSN從tran那里no和Code成績單與匹配Code ，並no在pre

Answer 1

這是你想要的嗎？

;WITH Cte AS(
    SELECT
        t.Student_SSN,
        cc = COUNT(t.Student_SSN)
    FROM transcript t
    INNER JOIN prereq p
        ON t.C_no = p.P_no
        AND t.D_Code = p.P_Code
    WHERE
        p.D_Code = 'INFS' 
        AND p.C_no = 614
    GROUP BY t.Student_SSN
)
SELECT DISTINCT Student_SSN
FROM Cte
WHERE cc = (SELECT COUNT(*)
            FROM prereq  p
            WHERE p.D_Code = 'INFS' AND p.C_no = 614)