如何从MySql中具有多个值（逗号分隔）的列中获取整数值

Question

I am facing some issue when I tried to fetch category_id from category column which having multiple values in it. I try to use Like clause but it doesn't work. This is what i tried

SELECT * FROM txz43_contact_details WHERE catid LIKE %18%

Answer 1

Use FIND_IN_SET()

SELECT * FROM txz43_contact_details 
WHERE find_in_set(18, catid) > 0

But actually you should really change your DB structure to avoid storing multiple values in one column!

Answer 2

You can use FIND_IN_SET()

SELECT * 
FROM txz43_contact_details 
WHERE FIND_IN_SET('18', catid) > 0

or

SELECT * 
FROM txz43_contact_details 
WHERE CONCAT(',', catid, ',') LIKE CONCAT('%,', '18', ',%')

• SQLFiddle Demo ( both queries included )