I need to select max value for different rows by same column:
Here's my table
id | visited_count
------------+--------------
01071400005 | 1
01071400005 | 5
01071400006 | 1
01071400006 | 3
I need to show 01071400005 and 01071400006, so I tried below code but it only selects 01071400005.
SELECT MAX(visited_count) - 1
from tbl_all_purple_flag_level where id in
(select distinct(id) from tbl_all_purple_flag_level )
How can I select both of them?
如果我正确理解,那么您只想按id
对表进行分组 :
SELECT id, MAX(visited_count) FROM tbl_all_purple_flag_level GROUP BY id
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