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如何在MySQL中一次仅获取N行？

2024-05-14 21:17:35 400

要一次仅获取N行，可以使用LIMIT运算符。以下是语法-

select *from yourTableNameLIMIT 0,N;

让我们首先创建一个表-

mysql> create table DemoTable
   (
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   Name varchar(20)
   );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable(Name) values('John');

mysql> insert into DemoTable(Name) values('Larry');

mysql> insert into DemoTable(Name) values('Bob');

mysql> insert into DemoTable(Name) values('Sam');

mysql> insert into DemoTable(Name) values('Mike');

mysql> insert into DemoTable(Name) values('David');

mysql> insert into DemoTable(Name) values('Carol');

mysql> insert into DemoTable(Name) values('Ramit');

mysql> insert into DemoTable(Name) values('Adam');

mysql> insert into DemoTable(Name) values('Chris');

mysql> insert into DemoTable(Name) values('Robert');

mysql> insert into DemoTable(Name) values('James');

mysql> insert into DemoTable(Name) values('Jace');

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-

+----+--------+
| Id | Name   |
+----+--------+
|  1 | John   |
|  2 | Larry  |
|  3 | Bob    |
|  4 | Sam    |
|  5 | Mike   |
|  6 | David  |
|  7 | Carol  |
|  8 | Ramit  |
|  9 | Adam   |
| 10 | Chris  |
| 11 | Robert |
| 12 | James  |
| 13 | Jace   |
+----+--------+
13 rows in set (0.00 sec)

以下是一次仅获取N行的查询。在这里，我们只获取10行-

mysql> select *from DemoTable LIMIT 0,10;

这将产生以下输出-

+----+-------+
| Id | Name  |
+----+-------+
|  1 | John  |
|  2 | Larry |
|  3 | Bob   |
|  4 | Sam   |
|  5 | Mike  |
|  6 | David |
|  7 | Carol |
|  8 | Ramit |
|  9 | Adam  |
| 10 | Chris |
+----+-------+
10 rows in set (0.00 sec)

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如何在MySQL中一次仅获取N行？

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