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MySQL 教程

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MySQL LIMIT 子句


MySQL LIMIT 子句

The LIMIT 子句用于指定要返回的记录数量。

The LIMIT 子句在具有数千条记录的大型表格上很有用。返回大量记录会影响性能。

LIMIT 语法

SELECT column_name(s)
FROM table_name
WHERE condition
LIMIT number;

演示数据库

以下是 Northwind 示例数据库中“Customers”表格的选择

CustomerID CustomerName ContactName Address City PostalCode Country
1

Alfreds Futterkiste Maria Anders Obere Str. 57 Berlin 12209 Germany
2 Ana Trujillo Emparedados y helados Ana Trujillo Avda. de la Constitución 2222 México D.F. 05021 Mexico
3 Antonio Moreno Taquería Antonio Moreno Mataderos 2312 México D.F. 05023 Mexico
4

Around the Horn Thomas Hardy 120 Hanover Sq. London WA1 1DP UK
5 Berglunds snabbköp Christina Berglund Berguvsvägen 8 Luleå S-958 22 Sweden


MySQL LIMIT 示例

以下 SQL 语句从“Customers”表格中选择前三条记录

示例

SELECT * FROM Customers
LIMIT 3;
亲自尝试 »

如果我们想选择记录 4 到 6(含)怎么办?

MySQL 提供了一种处理此问题的方法:使用 OFFSET。

下面的 SQL 查询表示“仅返回 3 条记录,从记录 4 开始(OFFSET 3)”

示例

SELECT * FROM Customers
LIMIT 3 OFFSET 3;
亲自尝试 »

添加 WHERE 子句

以下 SQL 语句从“Customers”表格中选择前三条记录,其中国家为“Germany”

示例

SELECT * FROM Customers
WHERE Country='Germany'
LIMIT 3;
亲自尝试 »

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