使用 MySQL 选择某个范围内的特定行?
mysqlmysqli database
首先我们创建一个表 −
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(20) ); Query OK, 0 rows affected (1.23 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(StudentName) values('John');
Query OK, 1 row affected (0.08 sec)
mysql> insert into DemoTable(StudentName) values('Carol');
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable(StudentName) values('David');
Query OK, 1 row affected (0.07 sec)
mysql> insert into DemoTable(StudentName) values('Bob');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(StudentName) values('Chris');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(StudentName) values('Robert');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(StudentName) values('Adam');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(StudentName) values('Mike');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(StudentName) values('Sam');
Query OK, 1 row affected (0.16 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
+----+-------------+ | Id | StudentName | +----+-------------+ | 1 | John | | 2 | Carol | | 3 | David | | 4 | Bob | | 5 | Chris | | 6 | Robert | | 7 | Adam | | 8 | Mike | | 9 | Sam | +----+-------------+ 9 rows in set (0.00 sec)
这是选择特定行的 MySQL 查询 −
mysql> select *from DemoTable ORDER BY Id DESC LIMIT 4 OFFSET 2;
输出
+----+-------------+ | Id | StudentName | +----+-------------+ | 7 | Adam | | 6 | Robert | | 5 | Chris | | 4 | Bob | +----+-------------+ 4 rows in set (0.00 sec)
