回答編集履歴
1
chousei
answer
CHANGED
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@@ -1,4 +1,16 @@
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1
1
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```SQL
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2
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+
create table tbl1(ID varchar(10),code varchar(10));
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3
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insert into tbl1 values
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4
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+
('AAA','aaa111'),
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5
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('AAA','bbb111'),
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6
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('AAA','aaa111'),
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7
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('BBB','aaa111');
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8
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+
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9
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create table tbl2(ID varchar(10),mail varchar(10));
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10
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insert into tbl2 values
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11
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('AAA',' aaa@'),
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12
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('BBB',' bbb@');
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13
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+
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14
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select * from(
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3
15
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select ID,code,count(*)as cnt from tbl1
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4
16
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where code='aaa111'
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