在MySQL中每隔2行跳过一次后选择下一行
要跳过行，可以使用OFFSET。让我们首先创建一个表-
mysql> create table DemoTable617(Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,FirstName varchar(100));
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable617(FirstName) values('John');
mysql> insert into DemoTable617(FirstName) values('Sam');
mysql> insert into DemoTable617(FirstName) values('Carol');
mysql> insert into DemoTable617(FirstName) values('Mike');
mysql> insert into DemoTable617(FirstName) values('David');
mysql> insert into DemoTable617(FirstName) values('Bob');
mysql> insert into DemoTable617(FirstName) values('Robert');
mysql> insert into DemoTable617(FirstName) values('Chris');
mysql> insert into DemoTable617(FirstName) values('Mike');
mysql> insert into DemoTable617(FirstName) values('Adam');使用select语句显示表中的所有记录-
mysql> select *from DemoTable617;
这将产生以下输出-
+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | John | | 2 | Sam | | 3 | Carol | | 4 | Mike | | 5 | David | | 6 | Bob | | 7 | Robert | | 8 | Chris | | 9 | Mike | | 10| Adam | +----+-----------+ 10 rows in set (0.00 sec)
以下是选择行的查询。由DESC一阶订购。之后，它将跳过两行并使用LIMIT5显示5行-
mysql> select tbl.* from (select *from DemoTable617 order by FirstName DESC LIMIT 5 OFFSET 2) AS tbl ORDER BY tbl.Id ;
这将产生以下输出-
+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | John | | 4 | Mike | | 5 | David | | 8 | Chris | | 9 | Mike | +----+-----------+ 5 rows in set (0.00 sec)