แปลง ENUM('M','F') เป็น 'Male'/'Female' ใน MySQL

ใช้ IF() หรือ CASE เพื่อแปลงค่า ENUM ให้อ่านง่าย

สร้างตารางพร้อม ENUM

mysql> create table DemoTable (
    UserId int,
    UserName varchar(40),
    UserGender ENUM('M','F')
);
Query OK, 0 rows affected (1.11 sec)

mysql> insert into DemoTable values(1,'John','M');  Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable values(2,'Maria','F'); Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values(3,'David','M');  Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable values(4,'Emma','F');   Query OK, 1 row affected (0.15 sec)

ข้อมูลดิบ

mysql> select * from DemoTable;

+--------+----------+------------+
| UserId | UserName | UserGender |
+--------+----------+------------+
| 1      | John     | M          |
| 2      | Maria    | F          |
| 3      | David    | M          |
| 4      | Emma     | F          |
+--------+----------+------------+

แปลงด้วย IF()

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

ผลลัพธ์

+--------+----------+------------+
| UserId | UserName | UserGender |
+--------+----------+------------+
| 1      | John     | Male       |
| 2      | Maria    | Female     |
| 3      | David    | Male       |
| 4      | Emma     | Female     |
+--------+----------+------------+