I have a table named mm_test like follows:-
我有一个名为mm_test的表如下： -
id educations 1 3,4,6,8,9
I want to check whether this array contain (4,6). How to check this using mysql query. Mysql 'IN' command is not working for me.
我想检查这个数组是否包含（4,6）。如何使用mysql查询检查这个。 Mysql'IN'命令对我不起作用。
I put the query like this...
我把这样的查询...
select * from mm_test where educations IN (4,6);
But this query returned empty result. Please any one help me.
但是这个查询返回了空结果。请任何人帮助我。
2 个解决方案
#1
7
You can do this using find_in_set():
您可以使用find_in_set（）执行此操作：
where find_in_set(4, educations) > 0 and
find_in_set(6, educations) > 0
However, this is generally inefficient. The problem is your data structure. You should be using a junction table with one column for each education, instead of storing a list of integers in a highly-inappropriate data structure -- a string.
然而，这通常是低效的。问题是你的数据结构。对于每个教育，您应该使用一个包含一列的联结表，而不是将一个整数列表存储在一个非常不合适的数据结构中 - 一个字符串。
#2
0
Use this FIND_IN_SET Manual
使用此FIND_IN_SET手册
SELECT *
FROM mm_test
WHERE FIND_IN_SET(4, educations) > 0
AND FIND_IN_SET(6, educations) > 0;
#1
7
You can do this using find_in_set():
您可以使用find_in_set（）执行此操作：
where find_in_set(4, educations) > 0 and
find_in_set(6, educations) > 0
However, this is generally inefficient. The problem is your data structure. You should be using a junction table with one column for each education, instead of storing a list of integers in a highly-inappropriate data structure -- a string.
然而，这通常是低效的。问题是你的数据结构。对于每个教育，您应该使用一个包含一列的联结表，而不是将一个整数列表存储在一个非常不合适的数据结构中 - 一个字符串。
#2
0
Use this FIND_IN_SET Manual
使用此FIND_IN_SET手册
SELECT *
FROM mm_test
WHERE FIND_IN_SET(4, educations) > 0
AND FIND_IN_SET(6, educations) > 0;