MySQL 查询显示所有包含大写字母的字段?
mysqlmysqli database
要显示所有包含大写字母的字段，请使用 RLIKE 对字符串表达式进行模式匹配。
首先我们创建一个表 −
mysql> create table contains_capital_letterDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(100) -> ); Query OK, 0 rows affected (1.42 sec)
下面是使用 insert 命令在表中插入一些记录的查询 −
mysql> insert into contains_capital_letterDemo(Name) values('Larry');
Query OK, 1 row affected (0.17 sec)
mysql> insert into contains_capital_letterDemo(Name) values('larry');
Query OK, 1 row affected (0.12 sec)
mysql> insert into contains_capital_letterDemo(Name) values('john');
Query OK, 1 row affected (0.13 sec)
mysql> insert into contains_capital_letterDemo(Name) values('JOHN');
Query OK, 1 row affected (0.36 sec)
mysql> insert into contains_capital_letterDemo(Name) values('mike');
Query OK, 1 row affected (0.14 sec)
mysql> insert into contains_capital_letterDemo(Name) values('Mike');
Query OK, 1 row affected (0.27 sec)
以下是使用 select 语句显示表中的所有记录的查询 −
mysql> select * from contains_capital_letterDemo;
这将产生以下输出 −
+----+-------+ | Id | Name | +----+-------+ | 1 | Larry | | 2 | larry | | 3 | john | | 4 | JOHN | | 5 | mike | | 6 | Mike | +----+-------+ 6 rows in set (0.00 sec)
以下查询显示所有包含大写字母的字段 −
mysql> select * from contains_capital_letterDemo WHERE CAST(Name AS BINARY) RLIKE '[A-Z]';
这将产生以下输出 −
+----+-------+ | Id | Name | +----+-------+ | 1 | Larry | | 4 | JOHN | | 6 | Mike | +----+-------+ 3 rows in set (0.00 sec)
