mysql 多表关联查询 实现 全文匹配的 模糊搜索接口 SQL

SELECT tagDeptUserRel.* 
FROM tag_dept_user_rel tagDeptUserRel
inner join product prod on find_in_set(prod.id, tagDeptUserRel.dept_mapping_product_ids)
inner join employee creatorEmployee on creatorEmployee.work_no = tagDeptUserRel.creator
inner join employee ownerEmployee on ownerEmployee.work_no = tagDeptUserRel.owner
inner join tag_group tagGroup on find_in_set(tagGroup.id, tagDeptUserRel.tag_group_ids)
inner join tag_group_show_user_rel tagGroupShowUserRel on tagGroupShowUserRel.owner = tagDeptUserRel.owner
where 
concat_ws(',',
prod.swork_dept_name,
creatorEmployee.emp_name,
creatorEmployee.nick_name,
ownerEmployee.emp_name,
ownerEmployee.nick_name,
tagGroup.name,
(select tg.name from tag_group tg where tg.id = tagGroupShowUserRel.show_group_id))
like CONCAT('%','之剑','%') ;


        

          
        
        
        

          

          AI 代码解读
        
      
      

SELECT tagDeptUserRel.* ,
concat_ws(',',
prod.swork_dept_name,
creatorEmployee.emp_name,
creatorEmployee.nick_name,
ownerEmployee.emp_name,
ownerEmployee.nick_name,
tagGroup.name,
(select tg.name from tag_group tg where tg.id = tagGroupShowUserRel.show_group_id)) as searchFullText

FROM tag_dept_user_rel tagDeptUserRel
inner join product prod on find_in_set(prod.id, tagDeptUserRel.dept_mapping_product_ids)
inner join employee creatorEmployee on creatorEmployee.work_no = tagDeptUserRel.creator
inner join employee ownerEmployee on ownerEmployee.work_no = tagDeptUserRel.owner
inner join tag_group tagGroup on find_in_set(tagGroup.id, tagDeptUserRel.tag_group_ids)
inner join tag_group_show_user_rel tagGroupShowUserRel on tagGroupShowUserRel.owner = tagDeptUserRel.owner
where 
concat_ws(',',
prod.swork_dept_name,
creatorEmployee.emp_name,
creatorEmployee.nick_name,
ownerEmployee.emp_name,
ownerEmployee.nick_name,
tagGroup.name,
(select tg.name from tag_group tg where tg.id = tagGroupShowUserRel.show_group_id))
like CONCAT('%','之剑','%') ;


        

          
        
        
        

          

          AI 代码解读
        
      
      

mysql中FIND_IN_SET的使用方法

在mysql中，有时我们在做数据库查询时，需要得到某字段中包含某个值的记录，但是它也不是用like能解决的，使用like可能查到我们不想要的记录，它比like更精准，这时候mysql的FIND_IN_SET函数就派上用场了，下面来具体了解一下。

FIND_IN_SET(str,strlist)函数

str 要查询的字符串

strlist 字段名 参数以”,”分隔 如 (1,2,6,8)

查询字段(strlist)中包含(str)的结果，返回结果为null或记录

下面举例说明

test表中有如下字段及值

下面我想查询area中包含”1″这个参数的记录

SELECT * from test where FIND_IN_SET('1',area)
返回值

下面查询btype字段中包含”15″这个参数的值

SELECT * from test where FIND_IN_SET('15',btype)
返回值

下面查询btype字段中包含”5″这个参数的值

SELECT * from test where FIND_IN_SET('5',btype)
返回值为null,因为btype中没有”5”这个值，它不同于 like 模糊查询，它是以“,”来分隔值

接下面查询btype字段中包含”20″这个参数的值

SELECT * from test where FIND_IN_SET('20',btype)
当然它的返回值为null，因为字段中没有这个值

FIND_IN_SET和like的区别

like是广泛的模糊匹配，字符串中没有分隔符，Find_IN_SET 是精确匹配，字段值以英文”,”分隔，Find_IN_SET查询的结果要小于like查询的结果。

select 嵌套使用

SELECT tagDeptUserRel.* ,
concat_ws(',',
prod.swork_dept_name,
creatorEmployee.emp_name,
creatorEmployee.nick_name,
ownerEmployee.emp_name,
ownerEmployee.nick_name,
tagGroup.name,
(select tg.name from tag_group tg where tg.id = tagGroupShowUserRel.show_group_id)) as searchFullText

FROM tag_dept_user_rel tagDeptUserRel
...
where 
concat_ws(',',
prod.swork_dept_name,
creatorEmployee.emp_name,
creatorEmployee.nick_name,
ownerEmployee.emp_name,
ownerEmployee.nick_name,
tagGroup.name,
(select tg.name from tag_group tg where tg.id = tagGroupShowUserRel.show_group_id))
like CONCAT('%','之剑','%')


        

          
        
        
        

          

          AI 代码解读