質問編集履歴
5
aaaaaa
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MySQLでのSELECTした
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MySQLでのSELECTで名前変更したものをを検索する方法。
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### 前提・実現したいこと
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SQLでSELECTで変更した値を検索したい。
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SQLでSELECTで名前を変更した値を検索したい。
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### 該当のソースコード
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@@ -12,16 +12,16 @@
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WHEN gender = '男' THEN 1
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WHEN gender = null THEN 2
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ELSE 99
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END as
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END as gender1
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FROM users where
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FROM users where gender1 = 2
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SELECT
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IF(
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gender = null, gender = 2,
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gender
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)
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) gender1
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FROM users
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where
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where gender1 = 2;
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create table users
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@@ -58,4 +58,16 @@
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|14|null|
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|15|null|
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### ご教授ください。
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### ご教授ください。
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### 追記
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```
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68
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SELECT
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gender as g1
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FROM users
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where g1 is null;
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+
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```
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4
あああああ
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File without changes
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body
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@@ -49,4 +49,13 @@
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INSERT INTO users (gender) VALUES (null);
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```
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# 期待値
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|id|gender|
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|:--|:--:|
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|11|null|
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|12|null|
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|13|null|
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|14|null|
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|15|null|
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### ご教授ください。
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3
SELECT IF( gender = null, gender = 2, gender ) gender FROM users where gender = 2;
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File without changes
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body
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@@ -15,7 +15,15 @@
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END as gender
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FROM users where gender = 2
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SELECT
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IF(
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gender = null, gender = 2,
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gender
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) gender
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FROM users
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where gender = 2;
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+
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create table users
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(
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id int auto_increment
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2
MySQL
title
CHANGED
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@@ -1,1 +1,1 @@
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1
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-
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1
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+
MySQLでのSELECTした値を検索する方法。
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body
CHANGED
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File without changes
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1
sssss
title
CHANGED
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File without changes
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body
CHANGED
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@@ -13,7 +13,7 @@
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13
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WHEN gender = null THEN 2
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14
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ELSE 99
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END as gender
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16
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-
FROM
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FROM users where gender = 2
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create table users
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