I want to count the rows of SQL statement with GROUP BY. Here is my sql statement:
I want to get the count of these rows
SELECT RETAILER_ID, COUNT(RETAILER_ID) AS TOTAL
FROM ret_retailer
LEFT JOIN temp_sg_screen_sto_72_mos_summary ON ret_retailer.RETAILER_FULL_NAME = temp_sg_screen_sto_72_mos_summary.RETAILER_NAME
WHERE MAY_2018 < 100000
GROUP BY RETAILER_ID
Here:
select count(*)
from (
-- insert your query here
) sub
You can simply use count(distinct):
SELECT COUNT(DISTINCT r.RETAILER_ID)
FROM ret_retailer r LEFT JOIN
temp_sg_screen_sto_72_mos_summary s
ON r.RETAILER_FULL_NAME = s.RETAILER_NAME
WHERE MAY_2018 < 100000 ;
The only difference from your results if if RETAILER_ID could ever be NULL. It is easy enough to adjust for NULL values, but I'm guessing that it is never NULL.
Related
I'm trying to substitute my join SQL code to a different code without any of JOIN statements for faster data retrieval. However, i'm getting the error below.
#1242 - Subquery returns more than 1 row
What i would like to do, get all rows from one table 'tbl_my_itemlist' and JOIN to other more tables, tbl_register and tbl_register without using JOIN statements.
The Code using JOIN statement (works fine).
SELECT
tbl_screenshots.screenshot_image_url,
mit.my_itemlist_id,
mit.item_name,
mit.item_initial_cost,
mit.item_offer_cost,
mit.offer_date_from,
mit.offer_date_to
FROM
(
SELECT
my_itemlist_id
FROM
tbl_my_itemlist
WHERE
offer_date_from >='2020-10-20' AND offer_date_to <= '2020-10-30' AND
item_deleted_status = 'active'
) mlist
JOIN tbl_my_itemlist mit ON
mit.my_itemlist_id = mlist.my_itemlist_id
RIGHT JOIN tbl_screenshots ON mit.my_itemlist_id =
tbl_screenshots.my_itemlist_id
RIGHT JOIN tbl_register ON tbl_register.register_id = mit.register_id
GROUP BY
mit.my_itemlist_id
ORDER BY mit.offer_date_to ASC LIMIT 2
The code i'm substituting the JOIN statement code with.
SELECT
mit.my_itemlist_id,
mit.item_name,
mit.item_initial_cost,
mit.item_offer_cost,
mit.offer_date_from,
mit.offer_date_to,
(
SELECT
reg.business_name
FROM
tbl_register reg
WHERE
reg.register_id = mit.register_id
) reg_sql,
(
SELECT
sshots.screenshot_image_url
FROM
tbl_screenshots sshots
WHERE
sshots.my_itemlist_id = mit.my_itemlist_id
) sshots_sq
FROM
tbl_my_itemlist mit
WHERE
mit.offer_date_from >= '2020-10-20' AND mit.offer_date_to <= '2020-10-30' AND mit.item_deleted_status = 'active'
GROUP BY
mit.my_itemlist_id
ORDER BY
mit.offer_date_to ASC
LIMIT 2
I'm trying to build an SQL query that can retrieve data from million records within very short period of time as compared to using the JOIN statement.
I can imagine that question exists in some way, but I haven't found what I was looking for.
I need to remove the found values from the result I'm getting in the main query.
Consider the following:
The mainquery:
SELECT idTable
FROM tblTables
WHERE NOT IN idTables = ( **SUBQUERY HERE** )
AND dtSeats >= 4
LIMIT 1;
The subquery:
SELECT idTable
FROM tblTables,tblReservation
WHERE tblTables.idTable = tblReservation.fiTable
AND fiTime = 1
AND dtResDate = "2020-06-16"
In the tblTables there are idTable and dtSeats.
In the tblReservation are fiTime and dtResDate.
The subquery can get up to three rows.
I need to get the first free table with the lowest number of seats possible.
Thanks for helping me out!
Having the DDL and some sample data would be helpful, but I think what you are looking for is a NOT EXISTS clause. It returns everything in the outer query that doesn't match with a record in the inner query.
SELECT idTable
FROM tblTables tt
WHERE NOT EXISTS (
SELECT NULL FROM tblReservation tr WHERE tt.idTable = tr.idTable AND
tr.dtResDate = '2020-06-16'
)
AND dtSeats >= 4
ORDER BY tt.dtSeats
LIMIT 1
I have a mySQL query that groups results by quiz attempt ID:
SELECT *
FROM quiz_log
WHERE archived = 0
GROUP BY quiz_attempt_id
ORDER BY quiz_attempt_id ASC
My question is how do I now count up the attempts in the by app_user_id. The app_user_id = 150 appears three times, so I need another column with the number 1 on the first line, 2 on the 3rd line and 3 on the 19th line.
You can use a correlated query:
SELECT t.*,
(SELECT count(distinct s.quiz_attempt_id) FROM quiz_log s
WHERE s.app_user_id = t.app_user_id
AND s.timestamp <= t.timestamp) as Your_Cnt
FROM quiz_log t
WHERE ....
I have three tables named issue_details, nature_payments, and rci_records. Now I have this query which joins this three tables.
SELECT issue_details.issue_date AS Date,
issue_details.check_no AS Check_No,
payees.payee_name AS Name_payee,
nature_payments.nature_payment AS Nature_of_Payment,
issue_details.issue_amount AS Checks_issued,
issue_details.nca_balance AS Nca_balance
FROM
issue_details
INNER JOIN
nature_payments ON
issue_details.nature_id = nature_payments.nature_id
INNER JOIN
payees ON
issue_details.payee_id = payees.payee_id
ORDER BY Date Asc, Check_no ASC
On my column in Nca_balance, this is a computed differences of every issuances of check. But you may not know what really the process of how I got the difference but to make it simple, let's say that I have another query
that dynamically get also the difference of this nca_balance column. Here is the query:
SELECT r.*,
(#tot := #tot - issue_amount) as bank_balance
FROM (SELECT #tot := SUM(nca_amount) as nca_total FROM nca
WHERE account_type = 'DBP-TRUST' AND
year(issue_date) = year('2015-01-11') AND
month(issue_date) = month('2015-01-11')
)
vars CROSS JOIN issue_details r
WHERE r.account_type = 'DBP-TRUST' AND
r.issue_date = '2015-01-11'
ORDER BY r.issue_date, r.check_no
I know it you may not get my point but I just want to replace the first query of the line
issue_details.nca_balance AS Nca_balance
with my own computation on my second query.
Please help me combine those two query into a single query. Thanks
I just want to perform multiple table operations in single query. The query is:
select name,sno , id as ids ,(select sum(amount) from client_credits
where user_id = ids) As total from clients where sno = '4' and total > '0'
This query is not working when I am trying use ** total > 0 **. Is there any other possibility ways? Please help me.
total is an alias. Aliases are not resolved when the WHERE clause is reached.
Try: where sno = 4 having total > 0
Alternatively, and more efficiently:
SELECT `c`.`name`, `c`.`sno`, `c`.`id`, SUM(`ccr`.`amount`) AS `total`
FROM `clients` AS `c`
JOIN `client_credits` AS `ccr` ON `c`.`id`=`ccr`.`user_id`
WHERE `c`.`sno` = 4
GROUP BY `c`.`id`
Notice how the total > 0 part is gone? That's because if there are no rows to join, then nothing will be joined and the rows are removed from the result ;)