Complaint_status Table : multiple rows for a complaints
id complaint_id status_type status_value
1 11 2 0
2 11 2 2
3 11 2 1
4 11 2 2
Trying to get min(id) having status_type=2 and status_value=2 but showing null,have to use case statement for doing other stuff.
SELECT c3.id AS Ticket_id,
CASE
WHEN cs.status_value=2 THEN cs.created_at
ELSE NULL
END AS Closure_date
FROM complaint c3
INNER JOIN complaint_status cs ON cs.complaint_id=c3.id
WHERE cs.id IN
(SELECT min(id)
FROM complaint3_status
WHERE complaint_id=c3.id
AND status_type=2)
AND c3.id IN(11)
Here is one method that gives you the entire row:
select cs.*
from complaint_status cs
where status_type = 2 and status_value = 2
order by id asc
limit 1;
You can just use select id if that is all you want. I have no idea what case has to do with this query.
Related
I have two tables groups and groups_members
groups
id
name
1
GROUP 1
2
GROUP 2
3
GROUP 2
groups_members
group_id
user_id
1
123
2
123
2
555
1
4643
3
45434
Now I want to display ALL groups and check if the user i show the groups for (lets say user_id = 555) is in a group or not. Something like this:
SELECT g.id, g.name, is_in_group
FROM g.groups
JOIN groups_members gm ON gm.user_id = 555
Expected output:
id
name
is_in_group
1
GROUP 1
NULL
2
GROUP 2
1
3
GROUP 3
NULL
You have several ways to do so, a simple trick that comes to my mind is this one:
SELECT
g.*,
CAST(gm.user_id / gm.user_id AS UNSIGNED) AS is_in_group
FROM sgroups AS g
LEFT JOIN sgroups_members AS gm
ON g.id = gm.group_id
AND gm.user_id = 555;
-- id name is_in_group
-- 1 GROUP 1 NULL
-- 2 GROUP 2 1
-- 3 GROUP 3 NULL
I'm trying to fetch the first entry of each group after the custom ORDER BY but don't know how to select that first entry of each group. The groups should be ordered by the #team if exist, otherwise other team else NULL.
SELECT t1.*
FROM tbl t1
INNER JOIN tbl2 t2 ON t2.group_id = t1.group
WHERE t2.region = #region
ORDER BY
CASE
WHEN team=#team THEN 1
WHEN team is NOT NULL THEN 2
WHEN team is NULL THEN 3
END
Content of tbl
id group team
1 1 AA
2 1 BB
3 2 AA
4 2 CC
5 3 BB
6 3 NULL
7 4 NULL
Expected result when #team=AA
id group team
1 1 AA
3 2 AA
5 3 BB
7 4 NULL
Expected result when #team=BB
id group team
2 1 BB
3 2 AA
5 3 BB
7 4 NULL
Use your custom ordering logic with ROW_NUMBER:
WITH cte AS (
SELECT t1.*, ROW_NUMBER() OVER (PARTITION BY t1.`group`
ORDER BY CASE WHEN team = #team THEN 1
WHEN team IS NOT NULL THEN 2
ELSE 3 END) rn
FROM tbl t1
INNER JOIN tbl2 t2 ON t2.group_id = t1.`group`
WHERE t2.region = #region
)
SELECT id, `group`, team
FROM cte
WHERE rn = 1;
Side note: Avoid naming your table columns GROUP, as this is a reserved MySQL keyword, and therefore must always be escaped in backticks.
I need to process album count for each of the country per artist; however, I have a problem once I do group_concat for count in mysql, I search a bit in stackoverflow, I found I have to do sub select for group_concat. The problem is once I do the sub select in from I can not use a.id from the parent from filed table. I got error like following Unknown column 'a.id' in 'where clause'
This is the query:
SELECT a.seq_id, a.id
(SELECT GROUP_CONCAT(cnt) AS cnt FROM (
SELECT CONCAT_WS('-', mgr.country_code, count(mgr.media_id)) AS cnt
FROM music_album_artists AS ma
JOIN media_geo_restrict AS mgr ON ma.album_id = mgr.media_id
WHERE ma.artist_id = a.id
GROUP BY mgr.country_code
) count_table
) AS album_count
FROM music_artist AS a
WHERE a.seq_id > 0 and a.seq_id < 10000
The sample data in tables:
music_artists:
seq_id id name
1 1 Hola
2 2 Vivi
music_album_artists:
id artist_id album_id
1 1 1
2 1 2
3 1 5
4 1 10
5 2 2
6 2 10
6 2 1
media_geo_restrict:
album_id country_code
1 BE
1 CA
1 DE
1 US
2 CH
2 CA
2 CH
5 DE
10 US
The result I would like to have
seq_id id album_count
1 1 BE--1,CA--2,CH--1,DE--1,US--1
2 2 CA--1,US--2,CH--1
Here is what you need:
select seq_id, id, group_concat(concat(country_code, '--', qtd))
from (
select ma.seq_id, ma.id,
mgr.country_code, count(*) qtd
from music_artists ma
inner join music_album_artists maa
on ma.id = maa.artist_id
inner join media_geo_restrict mgr
on maa.album_id = mgr.album_id
where ma.seq_id > 0 and ma.seq_id < 10000
group by ma.seq_id, ma.id, ma.name,
mgr.country_code
) tb
group by seq_id, id
Here is the working sample: http://sqlfiddle.com/#!9/ff8b5/8
Try this and tell me:
SELECT a.seq_id, a.id, GROUP_CONCAT(cnt) AS cnt
FROM music_artist AS a,
(
SELECT ma.artist_id, CONCAT_WS('-', mgr.country_code, count(mgr.media_id)) AS cnt
FROM music_album_artists AS ma
JOIN media_geo_restrict AS mgr ON ma.album_id = mgr.album_id
GROUP BY mgr.country_code
) AS count_table
WHERE a.seq_id > 0 and a.seq_id < 10000
and a.id=count_table.artist_id
group by a.id
I am writing a query to grab the items that a specific user_id was the first to use. Here is some sample data -
item_id used_user_id date_used
1 1 2012-08-25
1 2 2012-08-26
1 3 2012-08-27
2 2 2012-08-27
3 1 2012-08-27
4 1 2012-08-21
4 3 2012-08-24
5 3 2012-08-23
query
select item_id as inner_item_id, ( select used_user_id
from test
where test.item_id = inner_item_id
order by date_used asc
limit 1 ) as first_to_use_it
from test
where used_user_id = 1
group by item_id
It returns the correct values
inner_item_id first_to_use_it
1 1
3 1
4 1
but the query is VERY slow on a giant table. Is there a certain index that I can use or a better query that I can write?
i can't get exactly what you mean because in your inner query you have sorted it by their used_user_id and and on your outer query you have filtered it also by their userid. Why not do this directly?
SELECT DISTINCT item_id AS inner_item_id,
used_user_id AS first_to_use_it
FROM test
WHERE used_user_id = 1
UPDATE 1
SELECT b.item_id,
b.used_user_id AS first_to_use_it
FROM
(
SELECT item_ID, MIN(date_used) minDate
FROM tableName
GROUP BY item_ID
) a
INNER JOIN tableName b
ON a.item_ID = b.item_ID AND
a.minDate = b.date_used
WHERE b.used_user_id = 1
I have two tables:
builders
b_id fk_c_id
1 1
2 1
3 1
4 1
5 1
6 2
7 2
subbuilders
fk_b_id sb_id
1 2
1 3
1 4
2 5
6 7
and i want Distinct b_id which are not exist in subbuilders table and must have same fk_c_id
I create:
SELECT DISTINCT b.id FROM pms_builder_to_subbuilders bsb
LEFT JOIN pms_builders b ON b.id = bsb.sb_id WHERE b.fk_c_id = '1'
but it show Distinct records from subbuilders.
You can get the desired results with the following query:
SELECT DISTINCT b.b_id FROM builders b LEFT JOIN subbuilders sb ON sb.fk_b_id = b.b_id WHERE b.fk_c_id = '1' AND ISNULL(fk_b_id);
i think you want this query:
SELECT DISTINCT b_ID
FROM builders
WHERE b_ID NOT IN
(SELECT DISTINCT fk_b_id FROM subbuilders)
but it returns
b_ID
========
3
4
5
7
but i didn't understand your statement: must have same fk_c_id. What do you mean by that?
b_id = fk_c_id
if that's the case then there will be no rows returned because only record 1 has the same b_ID and fk_c_id but exists in table subbuilders