将 MySQL 列中每个值的大小写转换为大写
mysqlmysqli database更新于 2025/10/18 10:20:17
为此，请在 MySQL 列上使用 UPPER()。让我们首先创建一个表 −
mysql> create table DemoTable627 (Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,FirstName varchar(100)); Query OK, 0 rows affected (0.62 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable627(FirstName) values(UPPER('John'));
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable627(FirstName) values(UPPER('Sam'));
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable627(FirstName) values(UPPER('Mike'));
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable627(FirstName) values(UPPER('Carol'));
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable627(FirstName) values(UPPER('dAVID'));
Query OK, 1 row affected (0.70 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable627;
这将产生以下输出 −
+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | JOHN | | 2 | SAM | | 3 | MIKE | | 4 | CAROL | | 5 | DAVID | +----+-----------+ 5 rows in set (0.00 sec)
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