Question

我有以下表结构：

cv1    cv2   cv_content1   cv_content2
abc    xyz     php,mysql     sql dotnet
aaa    xxx     java          php is my skill

我有两个关键字让我们说php和dotnet。现在我想从上面的表t1获取记录，其中前面提到的两个关键字在列cv_content1和cv_content2中有OR条件。我想要下面的记录：

cv1   cv2
abc    xyz  
---    xxx

我尝试了case语句，如果还有，我还要检查有多少关键字匹配记录，例如第一行结果是100％（php和dotnet都在行中）但是对于第二行它是50％（只有php匹配）。

到目前为止，我尝试了以下查询：

    SELECT ROUND(( ( if(LOCATE("php",cv_content1 )>0,25,0) OR if(LOCATE("php",cv_content2 )>0,25,0) ) + if(LOCATE("dotnet",cv_content1 )>0,25,0) OR if(LOCATE("dotnet",cv_content2 )>0,25,0) ) * 100 ) / 50) as SkillTot,if (own_content regexp '[[:<:]]smith[[:>:]]',`own_filename`),if (kings_content regexp '[[:<:]]smith[[:>:]]' ,`kings_filename`) FROM `t1`WHERE ( cv_content1 REGEXP '[[:<:]]php[[:>:]]' OR cv_content2 REGEXP '[[:<:]]php[[:>:]]' OR cv_content1 REGEXP '[[:<:]]dotnet[[:>:]]' OR cv_content2 REGEXP '[[:<:]]dotnet[[:>:]]')

它也有语法错误。不明白如何使用if语句

Answer 1

SELECT IF(FIND_IN_SET('php', cv_content1) OR FIND_IN_SET('dotnet', cv_content1),
          cv1, NULL) AS cv1,
       IF(FIND_IN_SET('php', cv_content2) OR FIND_IN_SET('dotnet', cv_content2),
          cv2, NULL) AS cv2
FROM YourTable
HAVING cv1 IS NOT NULL OR cv2 IS NOT NULL

Answer 2

使用find_in_set搜索并OR查找任何输入值。

示例：

select cv1, cv2
  from t1
 where find_in_set( 'php', concat( cv_content1, ',', cv_content2 ) ) > 0 
    or find_in_set( 'dotnet', concat( cv_content1, ',', cv_content2 ) ) > 0

修改1 ：

select 
   case when find_in_set( 'php', cv_content1 ) 
          or find_in_set( 'dotnet', cv_content1 ) 
        then cv1 else '---' end as cv1
 , case when find_in_set( 'php', cv_content2 ) 
          or find_in_set( 'dotnet', cv_content2 ) 
        then cv2 else '---' end as cv2
from t1;

演示 @ MySQL Fiddle

编辑2 ：

select 
   case when find_in_set( 'php', replace( cv_content1, ' ', ',' ) ) 
          or find_in_set( 'dotnet', replace( cv_content1, ' ', ',' ) ) 
        then cv1 else '---' end as cv1
 , case when find_in_set( 'php', replace( cv_content2, ' ', ',' ) ) 
          or find_in_set( 'dotnet', replace( cv_content2, ' ', ',' ) ) 
        then cv2 else '---' end as cv2
from t1;

演示 @ MySQL Fiddle

使用if条件mysql获取两列

2 个答案: