get result for 2 different tables in mysql -


i new mysql. have requirement, please see tables below

grand_score_master  autoid | user_id   | package_id | grand_level | timestamp | timestring 55     | cbs_00002 | s78c_e4vt6 | 1           | ...       | ... 58     | cbs_00002 | d47kndffqc | 3           | ...       | ... 64     | cbs_00002 | d47kndffqc | 1           | ...       | ... 65     | cbs_00002 | d47kndffqc | 2           | ...       | ...   mega_score_master  autoid | user_id   | package_id | mega_level | timestamp | timestring 1      | cbs_00002 | d47kndffqc | 1          | ...       | ...   expected result  user_id   | package_id | max_grand_leve | max_mega_level cbs_00002 | s78c_e4vt6 | 1              | 0 cbs_00002 | d47kndffqc | 3              | 1

package_id , user_id in both tables.

i trying make query pass user_id 'cbs_00002' , query return max(grand_level) , max(mega_level) matching/grouping common package_id both table user.

i tried 

select  max(grand_score_master.grand_level),         grand_score_master.package_id,         max(mega_score_master.mega_level)    grand_score_master inner join mega_score_master on      mega_score_master.package_id = grand_score_master.package_id   user_id='cbs_00002' group grand_score_master.package_id

but return result d47kndffqc because s78c_e4vt6 not present in mega_score_master

need help.

you're there, need change inner join left join; preserve rows first table, regardless of being matched in second 1 or not:

select  max(t1.grand_level) max_grand_level,         t1.package_id,         ifnull(max(t2.mega_level), 0) max_mega_level    grand_score_master t1 left join         mega_score_master t2 on      t2.package_id = t1.package_id   t1.user_id='cbs_00002' group t1.package_id

i added aliases tables, query results bit more compact.


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