select *
from
(
SELECT id, imei1, status
FROM `owarranty_imei` mto
WHERE EXISTS
(
SELECT 1
FROM `owarranty_imei` mti
WHERE mto.imei1=mti.imei1
LIMIT 1, 1
)
) t1
left join `owarranty_warranty_activations` as t2 on t1.id=t2.imei_id
where t2.id is null
limit 100
this is my query. In owarranty_imei has more than 100000 records. i want to get duplicates from imei table which owarranty_imei not in owarranty_warranty_activation table. This query work for few records but when i run it for more than 1000000 records its not working
SELECT
mto.id,
mto.imei1,
mto.status
FROM
`owarranty_imei` mto
INNER JOIN
`owarranty_imei` mti ON mto.imei1=mti.imei1
LEFT JOIN
`owarranty_warranty_activations` as t2 ON mto.id=t2.imei_id
GROUP BY mto.id
HAVING COUNT(t2.id)=0
Related
I am trying to join two tables and get the count and grouped by specific field. However, it outputs same count values even if the other table consist only two rows. How should I fix this?
Here's my code:
SELECT tbl1.preferredDay, COUNT(tbl1.preferredDay) as count_1, COUNT(tbl2.preferredDay) as count_2
FROM tblschedule as tbl1
LEFT JOIN tblappointments as tbl2 ON (tbl1.preferredDay = tbl2.preferredDay)
WHERE tbl1.preferredDay = tbl2.preferredDay
GROUP BY preferredDay;
Here is the output but it should be [15, 0][3, 3]
Your query is based on left join it will return the same count().
This is a working query for Mysql 8:
with tbl1 as (
SELECT preferredDay, count(1) as count_1
FROM tblschedule
GROUP BY preferredDay
),
tbl2 as (
SELECT preferredDay, count(1) as count_2
FROM tblappointments
GROUP BY preferredDay
)
select t1.preferredDay, t1.count_1, t2.count_2
from tbl1 t1
inner join tbl2 t2 on t1.preferredDay = t2.preferredDay
There are two WITHs to get separately the count and then an INNER JOIN to join those results
For Mysql 5.7 and lower :
select t1.preferredDay, t1.count_1, t2.count_2
from (
SELECT preferredDay, count(1) as count_1
FROM tblschedule
GROUP BY preferredDay
) as t1
inner join (
SELECT preferredDay, count(1) as count_2
FROM tblappointments
GROUP BY preferredDay
) as t2 on t1.preferredDay = t2.preferredDay
I got two table users(table 01)、record_dcm_upload(table02)
i try to query counts and latest upload file time by everylogin account(users.username)
like
SELECT record_dcm_upload.user_id, users.username, record_dcm_upload.upload_time, COUNT( * )
FROM record_dcm_upload
JOIN users ON ( users.id = record_dcm_upload.user_id )
GROUP BY record_dcm_upload.user_id
but my query sql got some problem (actually the result of upload_time not the latest)
how should i adjust my query code (hope user_id and upload_time all sort By DESC)
SELECT t2.id, t2.username, MAX(t1.upload_time), COUNT(*)
FROM record_dcm_upload t1
JOIN users t2 ON ( t2.id = t1.user_id )
GROUP BY t2.id, t2.username
I have a database of magento with double images, I want to delete those but first i got to detect them with a sql query.
I have tried this code
select t1.VALUE from catalog_product_entity_media_gallery t1
join catalog_product_entity_media_gallery t2 on (t1.value = t2.value)
this one:
select * from catalog_product_entity_media_gallery where value=value
and this one:
select
*
from
(
select
value
from
catalog_product_entity_media_gallery
group by
value
having count(*) > 1
) as t
inner join catalog_product_entity_media_gallery on (
catalog_product_entity_media_gallery.value = t.value
)
the first gives an error and the second- and third one gives back every product.
Give this one a try:
select
*
from (
select
entity_id,attribute_id,value,
MIN(value_id) value_id
from catalog_product_entity_media_gallery
group by
entity_id,attribute_id,value
having COUNT(*) > 1
) A1
inner join catalog_product_entity_media_gallery A2 on
A1.entity_id = A2.entity_id and
A1.attribute_id = A2.attribute_id and
A1.value = A2.value and
A1.value_id = A2.value_id
You can just get the min id by value, then except the other records:
select
*
from catalog_product_entity_media_gallery t1
where exists
( select * from
(select value, min(value_id) as min_value_id
from catalog_product_entity_media_gallery
group by value
) as t2
where t1.value=t2.value and t1.value_id=t2.min_value_id
)
If you want delete the duplicated rows, change exists to not exists.
delete
from catalog_product_entity_media_gallery t1
where not exists
( select * from
(select value, min(value_id) as min_value_id
from catalog_product_entity_media_gallery
group by value
) as t2
where t1.value=t2.value and t1.value_id=t2.min_value_id
)
Table column headers: n,t1,t2
entries :
1 A B
2 A C
3 B C
4 D E
5 B A
How do I count total number of rows each letter appears in t1 MINUS the number of rows they appear in t2 ? I need to do something like following 2 lines in 1 query :
select count(*) as val,t1 from table group by t1
select count(*) as val,t2 from table group by t2
Thanks,
Martin
Here is one way:
select t1, max(t1cnt) - max(t2cnt) as diff
from ((select t1, count(*) as t1cnt, 0 as t2cnt
from t
group by t1
) union all
(select t2, 0 as t1cnt, count(*) as t2cnt
from t
group by t2
)
) t
group by t1
Using the union all ensures that you get all possible values from both columns, even values that only appear in one column.
You can use the following query to get the result. This query first gets a list of all the distinct t1 and t2 values (this is the UNION query). Once you have the list of these values, then you can use a LEFT JOIN to the original queries that you posted:
select d.col, coalesce(totT1, 0) - coalesce(totT2, 0) Total
from
(
select t1 col
from entries
union
select t2 col
from entries
) d
left join
(
select count(*) totT1, t1
from entries
group by t1
) d1
on d.col = d1.t1
left join
(
select count(*) totT2, t2
from entries
group by t2
) d2
on d.col = d2.t2;
See SQL Fiddle with Demo
SELECT
*
FROM `catalog_webdesign_products` t
INNER JOIN tbl_member_registration t1 ont.userid=t1.fld_loginid
WHERE 1
AND t1.fld_member_category_level<9
AND t.product_img IS NOT NULL
ORDER BY RAND() LIMIT 5
In this query , I need rows with unique userid. I had tried 'group by userid' also but then product_img with null value is coming in result set.
yes you can use GROUP BY userid. but your query looks wrong here
INNER JOIN tbl_member_registration t1 on t.userid=t1.fld_loginid
^------------------------space here
try this
SELECT
*
FROM `catalog_webdesign_products` t
INNER JOIN tbl_member_registration t1 on t.userid=t1.fld_loginid
WHERE t1.fld_member_category_level<9
AND t.product_img IS NOT NULL
group by userid
ORDER BY RAND() LIMIT 5
edit:
SELECT
*
FROM (select * from `catalog_webdesign_products` where product_img IS NOT NULL) t
INNER JOIN tbl_member_registration t1 on t.userid=t1.fld_loginid
WHERE t1.fld_member_category_level<9
group by t.userid
ORDER BY RAND() LIMIT 5
For better performance you should move the condition for t1 into join statement. You problem could be the wrong JOIN condition. Try LEFT JOIN instead of INNER JOIN.
More about joins: http://www.w3schools.com/sql/sql_join.asp
SELECT *
FROM `catalog_webdesign_products` t
LEFT JOIN tbl_member_registration t1
ON (t.userid = t1.fld_loginid AND t1.fld_member_category_level < 9)
WHERE t.product_img IS NOT NULL
GROUP BY t.userid
ORDER BY RAND() LIMIT 5