mysql中length()、char_length()的區別

原創 whaxrl 2020-02-25 12:30

一、char_length(str)

1、長度的單位爲字符，一個多字節字符算作一個單字符

2、不管漢字還是數字或者是字母都算是一個字符

 

二、length(str)

1、utf8編碼下,一個漢字算三個字符,一個數字或字母算一個字符。

2、其他編碼下,一個漢字算兩個字符, 一個數字或字母算一個字符。

 

文章裝載自： mysql中length()、char_length()的區別  http://www.studyofnet.com/news/1232.html


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