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在MySQL中每隔2行跳过一次后选择下一行

2024-05-13 19:24:05 355

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)

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在MySQL中每隔2行跳过一次后选择下一行

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