回答編集履歴
1
ちょうせい
test
CHANGED
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@@ -56,4 +56,86 @@
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# リレーション関連
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```SQL
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create table customers(
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id varchar(30) primary key not null,
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last_name varchar(10),
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first_name varchar(10),
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email varchar(50),
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created_at datetime);
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-
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insert into customers values
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('cus_G50Aw9QPAn5VjF','田中','かずお','ken@gmail.com','2019-10-29 17:34:27'),
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('cus_G50esjtjdXCVSX','吉田','たろう','yoshida@gmail.com','2019-10-29 18:04:45'),
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('cus_G50ImEgofoHIjr','山田','こうすけ','goo@gmail.com','2019-10-29 17:42:48'),
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('cus_G50VgUaw2V2CZo','藤田','ニコル','show@gmail.com','2019-10-29 17:56:22');
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create table transactions(
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id varchar(30) primary key not null,
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customer_id varchar(30),
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subscription varchar(10),
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amount int,
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currentcy varchar(10),
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status varchar(10),
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create_at datetime);
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insert into transactions values
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('sub_G50eORaCOnTnJB','cus_G50esjtjdXCVSX','monthly','15000','jpy','active','2019-10-29 18:04:45'),
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('sub_G50IlV2zUFSPNh','cus_G50ImEgofoHIjr','monthly','15000','jpy','active','2019-10-29 17:42:48'),
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('sub_G50WH4OU89NMip','cus_G50VgUaw2V2CZo','monthly','15000','jpy','active','2019-10-29 17:56:22');
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```
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- ken@gmail.com
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```SQL
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SELECT customers.email AS email, transactions.id AS id FROM customers INNER JOIN transactions ON customers.id = transactions.customer_id WHERE customers.email = 'ken@gmail.com';
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```
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※結果：ヒットなし
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- yoshida@gmail.com
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```SQL
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SELECT customers.email AS email, transactions.id AS id FROM customers INNER JOIN transactions ON customers.id = transactions.customer_id WHERE customers.email = 'yoshida@gmail.com';
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```
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※結果
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136
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|email|id|
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138
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|:--|:--|
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|yoshida@gmail.com|sub_G50eORaCOnTnJB|
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