Ruby代码
mysql>selectsum(if(locate(',watch,',concat(",",seokeyword,","))>0,1,0))aswatch,sum(if(locate(',fashionwatch,',concat(',',seokeyword,',')>0,1,0))as`fashionwatch`
fromuxcell_channels;
+-------+---------------+
|watch|fashionwatch|
+-------+---------------+
|928|501|
+-------+---------------+
mysql>selectsum(if(locate(',watch,',concat(",",seokeyword,","))>0,1,0))aswatch,sum(if(locate(',fashionwatch,',concat(',',seokeyword,',')>0,1,0))as`fashionwatch`
fromuxcell_channels;
+-------+---------------+
|watch|fashionwatch|
+-------+---------------+
|928|501|
+-------+---------------+
Ruby代码
ux.first.attributes
ux.first.attributes.keys
mysql>selectsum(if(locate(',watch,',concat(",",seokeyword,","))>0,1,0))aswatch,sum(if(locate(',fashionwatch,',concat(',',seokeyword,',')>0,1,0))as`fashionwatch`
fromuxcell_channels;
+-------+---------------+
|watch|fashionwatch|
+-------+---------------+
|928|501|
+-------+---------------+
mysql>selectsum(if(locate(',watch,',concat(",",seokeyword,","))>0,1,0))aswatch,sum(if(locate(',fashionwatch,',concat(',',seokeyword,',')>0,1,0))as`fashionwatch`
fromuxcell_channels;
+-------+---------------+
|watch|fashionwatch|
+-------+---------------+
|928|501|
+-------+---------------+
Ruby代码
ux.first.attributes
ux.first.attributes.keys
本文介绍了一种使用Ruby语言来查询MySQL数据库的方法,通过构造复杂的SQL语句实现对特定字段(如SEO关键词)的条件筛选与计数汇总。展示了如何利用locate函数定位字符串位置并据此进行布尔判断,最终统计出满足条件的记录数量。
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