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select SUM(count.counts), CountMostUtilizedApps
from
( (select count(*) from performance.apps WHERE start_date >= '2021-02-06 00:00:00'
AND start_date <= '2021-02-09 00:00:00' and dh.parent_id in ('1234','8910') and group_id in ('4567','1112') group by crashes order by crashes desc limit 5) counts
(select count(*) from performance.apps WHERE start_date >= '2021-02-06 00:00:00'
AND start_date <= '2021-02-09 00:00:00' and parent_id in ('1234','8910') and group_id in ('4567','1112') order by AppTime limit 10) CountMostUtilizedApps
)
The most important thing is to properly write code, even if this is SQL script and ask question in question content, not only in title.
Like in following refcatored SQL query (from yours question):
SELECT
SUM(count.counts)
,CountMostUtilizedApps
FROM
SELECT
SUM(count.counts)
,CountMostUtilizedApps
FROM
(
(
SELECT count(*) from performance.apps
WHERE
start_date >= '2021-02-06 00:00:00'
AND start_date <= '2021-02-09 00:00:00'
AND dh.parent_id IN ('1234','8910')
AND group_id IN ('4567','1112')
GROUP BY
crashes
ORDER BY
crashes desc limit 5
) counts
(
SELECT
count(*)
FROM
performance.apps
WHERE
start_date >= '2021-02-06 00:00:00'
AND start_date <= '2021-02-09 00:00:00'
AND parent_id IN ('1234','8910')
AND group_id IN ('4567','1112')
ORDER BY
AppTime limit 10
) CountMostUtilizedApps
)
Asking: How to Improve this following query for PostgreSQL ?
Is not enough. Be more specific. What you exactly mean ?
I'm not PostgreSQL expert, and more important thing as any other here you must to give more details, because nobody here do not know what your database contains .
As I said I'm not PostgreSQL expert but for my first look your's SQL Query should'nt works at all...Isn't it true ?
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For example DECLARE #a = 10;
Required output be like:
1) 16/5/2020
2) 15/5/2020
3) 14/5/2020
4) 13/5/2020
5) 12/5/2020
6) 11/5/2020
7) 10/5/2020
8) 9/5/2020
9) 8/5/2020
10) 7/5/2020
If Declare #b = 5 then get last five days of dates in output.
Snowflake:
SELECT DATEADD(DAY, -SEQ4(), CURRENT_DATE()) AS generated_date
FROM TABLE(GENERATOR(ROWCOUNT=>10))
ORDER BY generated_date desc;
SEQn() functions are not guaranteed to be gap free, so you need to use ROW_NUMBER()
WITH tally AS (
SELECT ROW_NUMBER() OVER(ORDER BY SEQ4()) AS rn
FROM TABLE(GENERATOR(ROWCOUNT=>10))
)
SELECT DATEADD(DAY, -rn, CURRENT_DATE()) AS generated_date
FROM tally
ORDER BY generated_date
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I need recent 6 dates count
My code is
select DUE_DATE, count(*)
from DATA
group by DUE_DATE
03/24/2018 10
03/17/2018 20
03/10/2018 15
03/03/2018 23
02/24/2018 42
02/17/2018 32
02/10/2018 15
02/03/2018 17
01/27/2018 23
select DUE_DATE, count(*) from DATA group by DUE_DATE order by DUE_DATE desc limit 6
The simplest case would be if every date is presented and/or you're only interested in 6 most recent dates regardless of whether they're presented in your table or not:
select DUE_DATE, count(*)
from DATA
where DUE_DATE >= trunc(sysdate) - 5
group by DUE_DATE
order by DUE_DATE desc
(Note: dates that are not presented in your table won't be shown).
On the other hand, if you need 6 most recent dates from the subgroup of dates you have in your table, then you'll first need a subquery to fetch you those dates and than use count on those dates only:
select DUE_DATE, count(*)
from DATA
where DUE_DATE in (select distinct DUE_DATE
from DATA
order by DUE_DATE desc limit 6)
group by DUE_DATE
I hope I helped!
Are you looking for fetch first?
select DUE_DATE, count(*)
from DATA
group by DUE_DATE
order by DUE_DATE desc
fetch first 6 rows only;
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select * from TNAME where
to_char (tran_date,'YYYY') = 2018
Extract day? Your code suggests year, so - I'll use a year instead. Here are some options to do that:
SQL> select count(*) from dual where extract(year from sysdate) = 2018;
COUNT(*)
----------
1
SQL> select count(*) from dual where to_char(sysdate, 'yyyy') = '2018';
COUNT(*)
----------
1
SQL> select count(*) from dual where trunc(sysdate, 'yyyy') = date '2018-01-01';
COUNT(*)
----------
1
SQL>
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I need to create a trigger in SQL Server 2017 that will fire on INSERT and work off the CreatedDate column of my table.
The CreatedDate is of this format: 2017-09-21 07:15:59.883
What I want to do is check the time of the CreatedDate column and if it is between 7 and 8 I need to insert a value into a Notes column, if it is between 15 and 16 I need to insert another, if it is between 23 and 24 I need to insert another.
I am particularly stuck at the WHERE clause that I need to check the hour for. Not sure how to formulate this.
assuming your CreatedDate is datetime and not string
use datepart to checks for createdate hour and update the Notes column accordingly
UPDATE t
SET Notes = 'a value'
FROM inserted i
INNER JOIN mytable t ON i.pk = t.pk
WHERE datepart(hour, CreateDate) in (7, 8)
EDIT :
UPDATE t
SET Notes = case when datepart(hour, CreateDate) in ( 7, 8) then 'a value'
when datepart(hour, CreateDate) in (15, 16) then 'another value'
end
FROM inserted i
INNER JOIN mytable t ON i.pk = t.pk
WHERE datepart(hour, CreateDate) in (7, 8, 15, 16)
See datepart
where case when DATEPART ( HOUR, datetimeField ) =7 then someValue
case when DATEPART ( HOUR, datetimeField ) =15 then SomeOtherValue
case when DATEPART ( HOUR, datetimeField ) =23 then AnotherDiffetentValue
end
You can use DATEPART: https://learn.microsoft.com/en-us/sql/t-sql/functions/datepart-transact-sql
and CASE: https://learn.microsoft.com/en-us/sql/t-sql/language-elements/case-transact-sql
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I have a table to stores expiry dates of credit cards, below is the sample schema for table.
ExpiryDate Varchar(10)
Sample Data in Table is as follows:-
'08/10'
'09/11'
'08/16'
'10/17'
how can i find out if a card's date is expired?
I am not sure what you are expected, but You can use string manipulation with substring to get records those are not expired
Select *
FROM supportContacts
WHERE LEFT(ExpiryDate,2) >= MONTH(GETDATE()) AND RIGHT(ExpiryDate,2) >= RIGHT(YEAR(GETDATE()),2)
If you want expired card list then use this
Select *
FROM supportContacts
WHERE LEFT(ExpiryDate,2) < MONTH(GETDATE()) AND RIGHT(ExpiryDate,2) <= RIGHT(YEAR(GETDATE()),2)
SQL DEMO
With such an awful data structure you are forced to kludge this together. Here is one way of doing it.
with BadData as
(
select '08/10' as SemiDate union all
select '09/11' union all
select '08/16' union all
select '10/17'
)
select *
from BadData
where cast(replace(STUFF(SemiDate, 4, 0, '01-20'), '/', '-') as DATE) < CAST(getdate() as DATE)
If you stored the ExpirationDate as a date instead of a string this would be simple. I sure hope you aren't storing the credit card number alongside this.
select *
from billinginfo
where substring(expirydate,1,charindex('/',expirydate)-1) < month(getdate())
and '20'+ substring(expirydate,charindex('/',expirydate)+1, 2) <= year(getdate())
You can try this.
You want something like this:
select * from BillingInfo
where
cast(left(expiryDate, 2) as int) --take the month portion of the expiry date
< select datepart(mm, getdate()) --expiry month must be before current month
and
cast(right(expiryDate, 2) as int) --take the year portion of the expiry date
<= select datepart(yy, getdate()) % 1000 --expiry year must also be during or before current year
The % 1000 converts the year to two-digit format.
I guess you want this:
SELECT TOP 4 *
FROM BillingInfo
WHERE ExpiryDate in ('08/10','09/11','08/16','10/17')
This will find you the 4 items with those dates.