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not exist, not in, left join 的写法,不在。。。之内

发表于: 2010-11-13   作者:alafqq   来源:转载   浏览:
摘要: SELECT T2.DEPTNO FROM DEPT2 T2 WHERE NOT EXISTS (SELECT 1 FROM DEPT WHERE DEPT.DEPTNO = T2.DEPTNO) SELECT T2.DEPTNO FROM DEPT2 T2 WHERE T2.DEPTNO NOT IN (SELECT T1.DEPTNO FROM DEP
SELECT T2.DEPTNO
  FROM DEPT2 T2
 WHERE NOT EXISTS 
 (SELECT 1 FROM DEPT WHERE DEPT.DEPTNO = T2.DEPTNO)

 

SELECT T2.DEPTNO
FROM DEPT2 T2 
WHERE T2.DEPTNO NOT IN 
(SELECT T1.DEPTNO FROM DEPT T1); 

  

SELECT *
  FROM (SELECT T1.DEPTNO T12, T2.DEPTNO T22
          FROM DEPT2 T2
          LEFT JOIN DEPT T1 ON T1.DEPTNO = T2.DEPTNO)
 WHERE T12 IS NULL

 

not exist, not in, left join 的写法,不在。。。之内

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