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如何从MySQL数据库中选择前10个元素？

2024-04-30 17:53:06 387

使用带有LIMIT10的SQLORDERBY子句从数据库中选择前10个元素。

语法如下

SELECT *FROM yourTableName ORDER BY yourIdColumnName LIMIT 10;

为了理解上述语法，让我们创建一个表。创建表的查询如下

mysql> create table Clients
   - > (
   - > Client_Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   - > ClientName varchar(20)
   - > );

使用insert命令在表中插入一些记录。

查询如下

mysql> insert into Clients(ClientName) values('Larry');
mysql> insert into Clients(ClientName) values('Sam');
mysql> insert into Clients(ClientName) values('Bob');
mysql> insert into Clients(ClientName) values('David');
mysql> insert into Clients(ClientName) values('John');
mysql> insert into Clients(ClientName) values('James');
mysql> insert into Clients(ClientName) values('Robert');
mysql> insert into Clients(ClientName) values('Carol');
mysql> insert into Clients(ClientName) values('Mike');
mysql> insert into Clients(ClientName) values('Maxwell');
mysql> insert into Clients(ClientName) values('Chris');
mysql> insert into Clients(ClientName) values('Ramit');

使用select语句显示表中的所有记录。

查询如下

mysql> select *from Clients;

以下是输出

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

这是选择前10个元素的查询

mysql> select *from Clients ORDER BY Client_Id LIMIT 10;

以下是输出

+-----------+------------+
| Client_Id | ClientName |
+-----------+------------+
|         1 | Larry      |
|         2 | Sam        |
|         3 | Bob        |
|         4 | David      |
|         5 | John       |
|         6 | James      |
|         7 | Robert     |
|         8 | Carol      |
|         9 | Mike       |
|        10 | Maxwell    |
+-----------+------------+
10 rows in set (0.00 sec)

这是选择前10个元素的替代查询。

查询如下

mysql> select *from Clients limit 0,10;

以下是输出

+-----------+------------+
| Client_Id | ClientName |
+-----------+------------+
|         1 | Larry      | 
|         2 | Sam        |
|         3 | Bob        |
|         4 | David      |
|         5 | John       |
|         6 | James      |
|         7 | Robert     |
|         8 | Carol      |
|         9 | Mike       |
|        10 | Maxwell    |
+-----------+------------+
10 rows in set (0.00 sec)

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如何从MySQL数据库中选择前10个元素？

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