在 MySQL 中获取除第一行和最后一行之外的所有行
mysqlmysqli database
要获取除第一行和最后一行之外的所有行，请使用子查询以及 MIN() 和 MAX()。让我们首先创建一个表 −
mysql> create table DemoTable1917 ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentCode int, StudentMarks int ); Query OK, 0 rows affected (0.00 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1917(StudentCode,StudentMarks) values(78,95); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1917(StudentCode,StudentMarks) values(78,96); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1917(StudentCode,StudentMarks) values(78,97); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1917(StudentCode,StudentMarks) values(78,98); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1917(StudentCode,StudentMarks) values(78,99); Query OK, 1 row affected (0.00 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1917;
这将产生以下输出 −
+-----------+-------------+--------------+ | StudentId | StudentCode | StudentMarks | +-----------+-------------+--------------+ | 1 | 78 | 95 | | 2 | 78 | 96 | | 3 | 78 | 97 | | 4 | 78 | 98 | | 5 | 78 | 99 | +-----------+-------------+--------------+ 5 rows in set (0.00 sec)
以下查询用于获取除第一行和最后一行之外的所有行:
mysql> select * from DemoTable1917 where StudentId NOT IN ( ( select min(StudentId) from DemoTable1917 where StudentCode=78), (select max(StudentId) from DemoTable1917 where StudentCode=78) ) and StudentCode=78;
这将产生以下输出 −
+-----------+-------------+--------------+ | StudentId | StudentCode | StudentMarks | +-----------+-------------+--------------+ | 2 | 78 | 96 | | 3 | 78 | 97 | | 4 | 78 | 98 | +-----------+-------------+--------------+ 3 rows in set (0.00 sec)
