回答編集履歴
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追加
test
CHANGED
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@@ -11,3 +11,21 @@
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11
11
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on t1.name=t2.name and t1.register_num != t2.register_num;
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12
12
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13
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```
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14
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+
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15
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+
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16
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+
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17
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DELETE
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18
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19
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```sql
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20
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+
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21
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delete from `tbl` tt using
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22
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23
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(select t1.* from `tbl` t1
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25
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join (SELECT name, min(register_num) register_num FROM `tbl` GROUP BY name HAVING COUNT(*) > 1) t2
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26
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+
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27
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on t1.name=t2.name and t1.register_num != t2.register_num) t3
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28
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+
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29
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where tt.id=t3.id;
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30
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+
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31
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```
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