MySQL 查询将字符串转换为月份(数字)?
mysqlmysqli database
使用 str_to_date() 方法 −
select month(str_to_date(yourColumnName,'%b')) from yourTableName;
首先我们创建一个表 −
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, MonthName varchar(100) ); Query OK, 0 rows affected (0.76 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(MonthName) values('Jan');
Query OK, 1 row affected (0.25 sec)
mysql> insert into DemoTable(MonthName) values('Mar');
Query OK, 1 row affected (0.13 sec)
Display all records from the table using select statement:
mysql> select *from DemoTable;
输出
+----+-----------+ | Id | MonthName | +----+-----------+ | 1 | Jan | | 2 | Mar | +----+-----------+ 2 rows in set (0.00 sec)
以下是将字符串转换为月份(数字)的查询 −
mysql> select month(str_to_date(MonthName,'%b')) from DemoTable;
输出
+------------------------------------+ | month(str_to_date(MonthName,'%b')) | +------------------------------------+ | 1 | | 3 | +------------------------------------+ 2 rows in set (0.05 sec)
