如何检查SEQ没有＆＃39; 0＆＃39;记录

Question

表A

ID      SEQ 
123      0
123      1
123      2
123      3
234      2
234      4
234      5
345      2
345      3
345      4

现在我需要检查不具有SEQ = 0的ID。在上面的示例中，234和345没有0

Answer 1

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Answer 2

您可以使用NOT EXISTS子句过滤ID：

SELECT DISTINCT ID
FROM TableA a
WHERE NOT EXISTS (SELECT ID FROM TableA b WHERE SEQ = 0 AND a.ID = b.ID)

Runnable Sample：

CREATE TABLE #TableA ( ID INT, SEQ INT )

INSERT  INTO #TableA
        ( ID, SEQ )
VALUES  ( 123, 0 ),
        ( 123, 1 ),
        ( 123, 2 ),
        ( 123, 3 ),
        ( 234, 2 ),
        ( 234, 4 ),
        ( 234, 5 ),
        ( 345, 2 ),
        ( 345, 3 ),
        ( 345, 4 )

SELECT DISTINCT
        ID
FROM    #TableA a
WHERE   NOT EXISTS ( SELECT ID
                     FROM   #TableA b
                     WHERE  SEQ = 0
                            AND a.ID = b.ID )

DROP TABLE #TableA

产地：

ID
===
234
345

Answer 3

您可以使用GROUP BY：

SELECT ID
FROM mytable
GROUP BY ID
HAVING COUNT(CASE WHEN SEQ = 0 THEN 1 END) = 0