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MySQL 逻辑 具有文字和分类的外地操作员
原标题:MySQL Logical Operators in a field with text and integers

我的表格如下:

ATTRIBUTE1 | ATTRIBUTE2
weight: 190| height: 175
ctr: 400   | dmd: 19

能否在这些领域进行比较行动?

和大家一样,如果我想找不到200人的体重,那么yn子会看什么? 如果实地没有案文,我会问:

SELECT * FROM mytable WHERE attribute1 <  200 

但是,由于外地有“权重:权重”这一定义文本,我不清楚如何做到这一点。

最佳回答
where cast(substring(ATTRIBUTE1, instr(ATTRIBUTE1,  :  )+1 ) as unsigned) <200

备选案文:

where cast(replace(Field_2,  weight:  ,   ) as unsigned) > 180
问题回答

更 正

CAST(SUBSTRING(attribute1, INSTR(attribute,  :  ) AS SIGNED)

由于价值从一开始就包含着扼杀。

基本如此:

选择指数:并将其用作数值的子数(以至实际数字)。 接着,你把它交给一家律师。

(或许需要为《国际投资政策》增加一个+1。) 我不敢肯定,因为我没有我的客户。





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