表名:TEST
//TEST
A# NAME
------------
1 CHIRS
2 MAY
3 JOHN
//APPLIES
A# P#
---------------------
1 HELLO
2 YES
1 HAPPY
我何时使用此查询:
SELECT DISTINCT * FROM TEST t INNER JOIN APPLIES ap
on t.A#=ap.A# WHERE count(*)>1;
我想在APPLEST中显示仅显示1条或更多条记录,其中TEST.A#= APPLEIS.A#
预期产出:
A# NAME
-------------
1 CHIRS
答案 0 :(得分:1)
您应该在代码中单独指出列名。试试这个:
SELECT t.A#, t.NAME, t.ADDRESS, t.ACOMMENT
FROM TEST t INNER JOIN APPLIES ap
on t.A#=ap.A# GROUP BY t.A#, t.NAME, t.ADDRESS, t.ACOMMENT;
答案 1 :(得分:0)
按所有字段分组与使用distinct
基本相同:
SELECT DISTINCT *
FROM test t
INNER JOIN applies ap ON t.A#=ap.A#;