如何從emp表中刪除第5個最大工資，他也應該從部門表中的達拉斯

Question

我沒有得到我想到的結果。 我已經嘗試使用：

DELETE FROM emp c 
WHERE SAL IN (
    SELECT SAL 
    FROM EMP A 
    WHERE DEPTNO IN (
     SELECT DEPTNO 
     FROM DEPT 
     WHERE LOC IN ('DALLAS') 
    ) 
    AND 4 = (
     SELECT COUNT(*) 
     FROM EMP B 
     WHERE A.SAL< B.SAL 
    ) 
); 

Answer 1

DELETE FROM emp c 
WHERE SAL IN (
    SELECT TOP 1 
     sub1.SAL 
    FROM (
     SELECT TOP 5 
      SAL 
     FROM EMP A 
     inner join DEPT ON a.DEPTNO=DEPT.DEPTNO and DEPT.LOC='DALLAS' 
     ORDER BY SAL DESC 
    ) sub1 
    ORDER BY sub1.SAL ASC 
); 

Answer 2

瀏覽量超過工資必須在檢測到第五最高薪水幫助：

DELETE FROM emp where sal in(
    select sal from(
     SELECT sal, RANK() OVER (order by sal DESC) myrank 
      FROM emp) 
    where myrank=5 
) 
    and DEPTNO IN (
    SELECT DEPTNO 
    FROM DEPT 
    WHERE LOC IN ('DALLAS') 

如果你想在5日的工資是在達拉斯，即一個部門內不是跨越所有工資，請嘗試如下所示：

DELETE FROM emp where sal in(
    select sal from(
     SELECT sal, RANK() OVER (partition by depno order by sal DESC) myrank 
      FROM emp) 
    where myrank=5 
) 
    and DEPTNO IN (
    SELECT DEPTNO 
    FROM DEPT 
    WHERE LOC IN ('DALLAS')