回答編集履歴
1
参考
answer
CHANGED
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@@ -1,2 +1,15 @@
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1
1
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見た感じ、なにかのランク付けじゃないですか？
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2
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-
id順に連番をつけているとか？
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2
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+
id順に連番をつけているとか？
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3
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+
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4
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# sample
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5
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```SQL
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6
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create table tbl(id int not null unique,val int);
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7
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insert into tbl values(5,1),(7,2),(3,3),(1,4),(8,5);
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8
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```
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9
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10
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```SQL
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11
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select (select count(*)+1 from tbl as t2 where t2.id<t1.id) as rank,id,val
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12
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from tbl as t1 order by rank;
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13
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14
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```
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15
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