Question

I have following Problem

SELECT * from map_user_sticker WHERE map_user_sticker.user_id = 7;
+----+---------+------------+
| id | user_id | sticker_id |
+----+---------+------------+
| 35 |       7 |         55 |
|  3 |       7 |         30 |
| 32 |       7 |         49 |
| 33 |       7 |         52 |
| 34 |       7 |         43 |
| 36 |       7 |         50 |
+----+---------+------------+
6 rows in set (0.00 sec)


SELECT * FROM sticker;
+----+--------------------------------------------------+
| id | word                                             |
+----+--------------------------------------------------+
| 40 | I love Sonal                                     |
| 41 | Add User to Database                             |
| 39 | This is a dream Project                          |
| 33 | Narendra Sisodiya                                |
| 34 | Sourabh Parmar                                   |
| 30 | Sonal Sisodiya                                   |
| 42 | I love India                                     |
| 43 | I love Linux                                     |
| 44 | I hate Congress                                  |
| 45 | I love jQuery                                    |
| 48 | Modi will be the PM                              |
| 47 | Ramdev Baba is my Super Hero                     |
| 49 | हिन्दी से प्यार है |
| 50 | Linux is better then Windows                     |
| 52 | I am from Sehore                                 |
| 55 | I have 2 little kids - sadu and sonu             |
+----+--------------------------------------------------+
16 rows in set (0.00 sec)

I basically want to generate Result like

+----+--------------------------------------------------+----------+
| id | word                                             |  present |
+----+--------------------------------------------------+----------+
| 40 | I love Sonal                                     |  0       |
| 41 | Add User to Database                             |  0       |
| 39 | This is a dream Project                          |  0       |
| 33 | Narendra Sisodiya                                |  0       |
| 34 | Sourabh Parmar                                   |  0       |
| 30 | Sonal Sisodiya                                   |  1       |
| 42 | I love India                                     |  0       |
| 43 | I love Linux                                     |  1       |
| 44 | I hate Congress                                  |  0       |
| 45 | I love jQuery                                    |  0       |
| 48 | Modi will be the PM                              |  0       |
| 47 | Ramdev Baba is my Super Hero                     |  0       |
| 49 | हिन्दी से प्यार है                                      |   1      |
| 50 | Linux is better then Windows                     |   1      |
| 52 | I am from Sehore                                 |   1      |
| 55 | I have 2 little kids - sadu and sonu             |   1      |
+----+--------------------------------------------------+----------+
16 rows in set (0.00 sec)

Please Help me !!
I want to generate a extra column called “present”, based on following condition
If sticker_id from query1 == id from query 2 then present = 1
else present = 0

Answer 1

Here the Answer I was wanted to get !

Answer 1 –

SELECT s.* , IF(FIND_IN_SET(7,(GROUP_CONCAT(m.user_id))) != 0 , 1,0) as present, COUNT(m.user_id) as totalUsers 
FROM sticker s   
LEFT JOIN map_user_sticker m  
ON s.id = m.sticker_id 
GROUP BY id;

Answer 2 –

SELECT id,word, (case when 7 in (select user_id from map_user_sticker WHERE map_user_sticker.sticker_id=sticker.id) then 1 else 0 end) as present 
from sticker;

I don,t know which one is fast and better