如何按列值过滤重复记录

Question

我想从只有Isdefault记录的表中获取值。 refer image for output

图像TFN 831204456

既有ISDEFAULT值0和1，但我需要从ISDEFAULT获取值只有0喜欢TFN 965988826.

Answer 1

这应该给你具有TFN的重复值，其中ISDEFAULT行= 0

SELECT * FROM table1 
WHERE TFN IN 
    (SELECT TFN 
    FROM table1 
    WHERE IsDefault =0 
    GROUP BY TFN 
    HAVING COUNT (*) > 1) 
AND TFN NOT IN 
    (SELECT TFN 
    FROM table1 
    WHERE IsDefault =1 
    GROUP BY TFN)