你如何使用'LIKE'来搜索子查询?
E.g。我试过这样做,但是不起作用:
SELECT *
FROM mytable
WHERE name
LIKE '%
(SELECT name FROM myothertable)
%'
到目前为止,我有这个:
SELECT * FROM t1
WHERE t1.name IN (SELECT t2.name FROM t2)
AND (t1.title IN (SELECT t2.title FROM t2)
OR t1.surname IN (SELECT t2.surname FROM t2))
它工作正常,因为它返回完全匹配,但它似乎没有返回我的其他类似的记录,所以我还要检查:
t1.title LIKE'%t2.title%'和t1.surname LIKE'%t2.surname%'
我该怎么做?
答案 0 :(得分:23)
使用JOIN:
SELECT a.*
FROM mytable a
JOIN myothertable b ON a.name LIKE CONCAT('%', b.name, '%')
...但如果给定myothertable
条记录mytable
中有多个匹配项,则可能会有重复项。
使用EXISTS:
SELECT a.*
FROM mytable a
WHERE EXISTS (SELECT NULL
FROM myothertable b
WHERE a.name LIKE CONCAT('%', b.name, '%'))
使用Full Text Search MATCH
(需要myothertable
是MyISAM)
SELECT a.*
FROM mytable a
JOIN myothertable b ON MATCH(a.name) AGAINST (b.name)
答案 1 :(得分:11)
例如:
SELECT a_column
FROM mytable t
WHERE EXISTS (
SELECT 1
FROM myothertable ot
WHERE t.`name` LIKE '%' || ot.`name` || '%');
就术语而言:这被称为相关子查询。
答案 2 :(得分:2)
另一种方式:
select a.field, b.code
from table1 a
inner join (select code from table2 where ....) b on a.field like CONCAT('%', b.code, '%')
答案 3 :(得分:0)
最好的方法是创建名为NameMatch()的函数
最终查询:
SELECT * FROM mytable WHERE dbo.NameMatch(name) = 1
该功能如下:
create function dbo.NameMatch
(@_name varchar(100))
returns bit
as begin
declare @res bit
if exists (select 1 from myothertable where @_name like '%' + name + '%' )
set @res = 1
else set @res = 0
return @res
end
答案 4 :(得分:0)
它为我工作
SELECT *
FROM mytable
WHERE name
LIKE CONCAT('%',(SELECT name FROM myothertable),'%')
答案 5 :(得分:0)
SELECT * FROM t1 WHERE11.name IN(SELECT t2.name FROM t2) AND(t1.title IN(SELECT t2.title FROM t2) 或者t1.surname IN(SELECT t2.surname FROM t2))
答案 6 :(得分:0)
这个字符串适用于我。
" SELECT * FROM table1 WHERE字段,如CONCAT('%',(SELECT id FROM table2),'%')&#34 ;;