将MySQL列中的所有值转换为大写字母

为此，使用MySQL列上的UPPER()函数。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)

使用插入命令将一些记录插入表中 –

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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