回答編集履歴
1
追記
test
CHANGED
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@@ -15,3 +15,71 @@
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15
15
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のどちらかが必要になります
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18
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19
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20
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# 追記
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22
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23
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24
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ちなみにnickNameIDと優先順位が同じだったときはnoの小さいものを選ぶとこうです
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- 元データ
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```SQL
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32
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create table tbl(ID int primary key,nicknameID int,priority int);
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insert into tbl values
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(1,20,1),
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(2,20,2),
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(3,20,3),
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(4,21,2),
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(5,21,3),
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(6,23,2),
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(7,24,1),
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(8,24,1),
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(9,24,4),
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(10,25,3),
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(11,25,3),
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(12,25,4),
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(13,25,4),
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(14,26,2),
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(15,26,3),
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(16,26,4),
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(17,26,4),
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70
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71
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(18,26,4);
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72
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```
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74
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75
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76
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- 抽出
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```SQL
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80
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select * from tbl as t1
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where not exists(select 1 from tbl as t2 where t1.nicknameID=t2.nicknameID and (t1.priority>t2.priority or (t1.priority=t2.priority and t1.ID>t2.ID)))
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84
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85
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```
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