使用 LIKE 子句两次显示表中重复的 FirstName 和 LastName 的特定名称
mysqlmysqli database更新于 2024/4/7 13:12:00
首先我们创建一个表 −
mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(30) ); Query OK, 0 rows affected (0.70 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(StudentName) values('John Smith');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(StudentName) values('David Miller');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(StudentName) values('Carol Taylor');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(StudentName) values('John Doe');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(StudentName) values('Chris Brown');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(StudentName) values('Adam Doe');
Query OK, 1 row affected (0.11 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+-----------+---------------+ | StudentId | StudentName | +-----------+---------------+ | 1 | John Smith | | 2 | David Miller | | 3 | Carol Taylor | | 4 | John Doe | | 5 | Chris Brown | | 6 | Adam Doe | +-----------+---------------+ 6 rows in set (0.00 sec)
以下查询从表中选择名字为"John"且姓氏为"Doe"的记录 −
mysql> select *from DemoTable where StudentName LIKE '%John%' and StudentName LIKE '%Doe%';
这将产生以下输出 −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 4 | John Doe | +-----------+-------------+ 1 row in set (0.00 sec)
