MySQL group by multiple columns issue - mysql

Question

The query below collects temporary overview data for every user into memory table. Basicaly, user sees, count of items by keyword.
The problem is, it calculates total count of items by keyword_id.
What I need is, to calculate item_count by both keyword_id and item_type (Item.type).
SELECT
`Item`.`user_id` AS `user_id` ,
`ItemKeyword`.`keywordID` AS `keyword_id` ,
`Keyword`.`title` AS `keyword_title`,
count(`ItemKeyword`.`ItemID`) AS `ico_count`
FROM
(
(
`ItemKeyword`
JOIN `Item` ON(
(
`Item`.`id` = `ItemKeyword`.`ItemID`
)
)
)
JOIN `Keyword` ON(
(
`Keyword`.`id` = `ItemKeyword`.`keywordID`
)
)
)
GROUP BY
`Item`.`user_id` ,
`ItemKeyword`.`keywordID`;
Details
For example, now result looks like below
Basicaly, item_count is total of all item_types. What I need is, to separate the result below
user_id keyword_id keyword_title item_count
1 9645 surveillance 20
Into something like this:
user_id keyword_id keyword_title item_count item_type
1 9645 surveillance 18 1
1 9645 surveillance 2 2
Where, item_count are calculated by both keyword_id and item_type.
I can't figure out how to include item_type also into this query.
Any suggestions?

Answer 1

I do not understand your love of brackets (parenthesis). Why so many? in my opinion you lose the readability. It was just a side note.
If you need an extra grouping level you need to modify the query like this:
SELECT
`Item`.`user_id` AS `user_id` ,
`ItemKeyword`.`keywordID` AS `keyword_id` ,
`Keyword`.`title` AS `keyword_title`,
count(`ItemKeyword`.`ItemID`) AS `ico_count`,
`Item`.`type` AS `item_type`
FROM `ItemKeyword` JOIN `Item` ON
`Item`.`id` = `ItemKeyword`.`ItemID`
JOIN `Keyword` ON
`Keyword`.`id` = `ItemKeyword`.`keywordID`
GROUP BY
`Item`.`user_id` ,
`Item`.`type` ,
`ItemKeyword`.`keywordID`,
`Keyword`.`title`;