回答編集履歴
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美しさは兎も角、一応できている様です
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美しさは兎も角、一応できている様です。Postgresqlで書いていますのはご容赦ください。
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```sql
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select t1.AA, t1.BB, t1.CC from
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(select AA, BB, count(*) CC from tbl1
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group by AA, BB) t3
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group by AA) t2
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where t1.AA=t2.AA and t1.CC=t2.CC
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```
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withでも同じ様になってしまいました
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```with
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with tbl2 as (select AA, BB, count(*) CC
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from tbl1 group by AA, BB)
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select t2.AA, t2.BB, t2.CC from tbl2 t2,
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(select AA, max(CC) CC from tbl2 group by AA) t3
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where t2.AA=t3.AA and t2.CC=t3.CC
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order by t2.AA, t2.BB;
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```
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update
answer
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@@ -8,4 +8,15 @@
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group by AA, BB) t3
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group by AA) t2
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where t1.AA=t2.AA and t1.CC=t2.CC
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```
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withでも同じ様になってしまいました
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```with
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with tbl2 as (select AA, BB, count(*) CC
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from tbl1 group by AA, BB)
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select t2.AA, t2.BB, t2.CC from tbl2 t2,
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(select AA, max(CC) CC from tbl2 group by AA) t3
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where t2.AA=t3.AA and t2.CC=t3.CC
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order by t2.AA, t2.BB;
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```
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