How to use the Find_in_set function of MySQL

For example:
There is a Type field in the article table, he stores the article type, there are 1 headlines, 2 recommended, 3 hot, 4 graphics ..... 11,12,13, wait.

Now there is an article he is a headline, but also hot, or graphic,

The type is stored in 1,3,4 format.

How do we use SQL to find all of the 4 text standards in the type??


It's time for our find_in_set to come.

The following is the referenced content:

SELECT * from article where Find_in_set (' 4 ', type)

----------------------------------------------------------
The syntax for the Find_in_set function in the MySQL manual:

Find_in_set (Str,strlist)

If the string str is in a string list strlist consisting of N substrings, the return value ranges from 1 to N.
A string list is a string of sub-chains that are separated by ', ' symbols. If the first argument is a constant string and the second is a type set column, the Find_in_set () function is optimized to use bit calculations.
If STR is not strlist or strlist is an empty string, the return value is 0. If either parameter is NULL, the return value is null. This function will not work correctly when the first parameter contains a comma (', ').

mysql> SELECT find_in_set (' B ', ' a,b,c,d ');

2 because B is placed at 2 in the Strlist collection starting from 1
--------------------------------------------------------
Select Find_in_set (' 1 ', ' 1 '); The return is 1. The Strlist collection is a bit special. Only one string actually requires the previous string to return a number greater than 0 in the next string collection.

Select Find_in_set (' 2 ', ' + '); return 2
Select Find_in_set (' 6 ', ' 1 '); Returns 0
----------------------------------------------------------

Attention:
SELECT * from TreeNodes where Find_in_set (ID, ' 1,2,3,4,5 ');
Return multiple records at once using the Find_in_set function

ID is a field of a table and then each record is an ID equal to 1,2,3,4,5 when
Sort of like in (collection)
SELECT * from TreeNodes where ID in (1,2,3,4,5);

(go) MySQL Find_in_set function use method