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MySQL 查询选择 ENUM('M', 'F') 作为 'Male' 或 'Female'？

2023-06-20 09:57:03 455

您可以IF()为此使用。让我们首先创建一个表。这里的一列是ENUM类型

mysql> create table DemoTable
   (
   UserId int,
   UserName varchar(40),
   UserGender ENUM('M','F')
   );

使用插入命令在表中插入记录-

mysql> insert into DemoTable values(1,'John','M');
mysql> insert into DemoTable values(2,'Maria','F');
mysql> insert into DemoTable values(3,'David','M');
mysql> insert into DemoTable values(4,'Emma','F');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

这将产生以下输出-

+--------+----------+------------+
| UserId | UserName | UserGender |
+--------+----------+------------+
| 1      | John     | M          |
| 2      | Maria    | F          |
| 3      | David    | M          |
| 4      | Emma     | F          |
+--------+----------+------------+
4 rows in set (0.00 sec)

以下是选择ENUM('M','F')作为'Male'或'Female'的查询-

mysql> SELECT UserId,UserName,IF(UserGender='F','Female', 'Male') AS `UserGender` from DemoTable;

+--------+----------+------------+
| UserId | UserName | UserGender |
+--------+----------+------------+
| 1      | John     | Male       |
| 2      | Maria    | Female     |
| 3      | David    | Male       |
| 4      | Emma     | Female     |
+--------+----------+------------+
4 rows in set (0.00 sec)

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MySQL 查询选择 ENUM('M', 'F') 作为 'Male' 或 'Female'？

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