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MySQL SUBSTRING_INDEX() 函数

❮ MySQL 函数

示例

返回指定分隔符出现次数之前的字符串子串

SELECT SUBSTRING_INDEX("www.w3schools.com", ".", 1);
自己尝试 »

定义和用法

SUBSTRING_INDEX() 函数返回指定分隔符出现次数之前的字符串子串。

语法

SUBSTRING_INDEX(string, delimiter, number)

参数值

参数 描述
string 必需。原始字符串
delimiter 必需。要搜索的分隔符
number 必需。搜索分隔符的次数。可以是正数或负数。如果它是正数，此函数返回分隔符左侧的所有内容。如果它是负数，此函数返回分隔符右侧的所有内容。

技术细节

适用于 从 MySQL 4.0 开始

更多示例

示例

返回指定分隔符出现次数之前的字符串子串

SELECT SUBSTRING_INDEX("www.w3schools.com", ".", 2);
自己尝试 »

❮ MySQL 函数

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