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HomeBackend DevelopmentPHP Tutorialphp,mysql查询语句出错


这是sql语句,应该只查询到25条记录,请看运行结果

求告知,为什么


回复讨论(解决方案)

limit 25, 50
表示的是:从结果中的第 25 行开始,共输出 50 行

 LIMIT子句可以被用于限制被SELECT语句返回的行数。LIMIT取一个或两个数字自变量,自变量必须是非负的整数常数(当使用已预备的语句时除外)。

使用两个自变量时,第一个自变量指定返回的第一行的偏移量,第二个自变量指定返回的行数的最大值。初始行的偏移量为0(不是1)

 LIMIT子句可以被用于限制被SELECT语句返回的行数。LIMIT取一个或两个数字自变量,自变量必须是非负的整数常数(当使用已预备的语句时除外)。

使用两个自变量时,第一个自变量指定返回的第一行的偏移量,第二个自变量指定返回的行数的最大值。初始行的偏移量为0(不是1)


"select * from image where classify = 'beauty' order by id desc limit 25,25";那这个的意思就是,从25条开始,智取25条。对吧~

是的,这样就对了

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