I am currently using the UNION ALL workaround below to calculate old_eps_tfq regression slopes of each ticker based off its corresponding rownum value (see WHERE rownum < x). I am interested to know what the old_eps_tfq is when rownum < 4 then increment 4 by 1 to find out what old_eps_tfq is when rownum < 5, and so on (there are ~20 rownum)
Could I use PL/pgSQL for this?
SELECT * FROM(
WITH regression_slope AS(
SELECT
ROW_NUMBER() OVER ( PARTITION BY ticker ORDER BY earnings_growths_ped) AS rownum,
*
FROM "ANALYTICS"."vEARNINGS_GROWTHS"
--WHERE ticker = 'ACN'
ORDER BY ticker )
SELECT
ticker,
current_period_end_date,
max(earnings_growths_ped) AS max_earnings_growths_ped,
--max(rownum) AS max_rownum,
round(regr_slope(old_eps_tfq, rownum)::numeric, 2) AS slope,
round(regr_intercept(old_eps_tfq, rownum)::numeric, 2) AS y_intercept,
round(regr_r2(old_eps_tfq, rownum)::numeric, 3) AS r_squared
FROM regression_slope
WHERE rownum < 4
GROUP BY ticker, current_period_end_date
ORDER BY ticker asc ) q
UNION ALL
SELECT * FROM(
WITH regression_slope AS(
SELECT
ROW_NUMBER() OVER ( PARTITION BY ticker ORDER BY earnings_growths_ped) AS rownum,
*
FROM "ANALYTICS"."vEARNINGS_GROWTHS"
--WHERE ticker = 'ACN'
ORDER BY ticker )
SELECT
ticker,
current_period_end_date,
max(earnings_growths_ped) AS max_earnings_growths_ped,
--max(rownum) AS max_rownum,
round(regr_slope(old_eps_tfq, rownum)::numeric, 2) AS slope,
round(regr_intercept(old_eps_tfq, rownum)::numeric, 2) AS y_intercept,
round(regr_r2(old_eps_tfq, rownum)::numeric, 3) AS r_squared
FROM regression_slope
WHERE rownum < 5
GROUP BY ticker, current_period_end_date
ORDER BY ticker asc ) q
Here is my table
The top query SELECT * FROM (...) q sounds like useless.
Then you can try this :
WITH regression_slope AS(
SELECT
ROW_NUMBER() OVER ( PARTITION BY ticker ORDER BY earnings_growths_ped) AS rownum,
*
FROM "ANALYTICS"."vEARNINGS_GROWTHS"
--WHERE ticker = 'ACN'
ORDER BY ticker )
SELECT
max,
ticker,
current_period_end_date,
max(earnings_growths_ped) AS max_earnings_growths_ped,
--max(rownum) AS max_rownum,
round(regr_slope(old_eps_tfq, rownum)::numeric, 2) AS slope,
round(regr_intercept(old_eps_tfq, rownum)::numeric, 2) AS y_intercept,
round(regr_r2(old_eps_tfq, rownum)::numeric, 3) AS r_squared
FROM regression_slope
INNER JOIN generate_series(4, 24) AS max -- the range 4 to 24 can be adjusted to the need
ON rownum < max
GROUP BY max, ticker, current_period_end_date
ORDER BY max asc, ticker asc
I have a T-SQL query that return X records ordered.
I want to get only on record , for instance, only the 5th record from that result: how ?
Thanks
For that you have to update your query.
I.e in oracle we have rownum that assign rownumber to every row.
You can do like this,
Select * from(
Select a.*, rownum as n from your table) where n = 3;
Something like this.
Try this:
WITH NumberedTable AS
(
SELECT
RowNo = ROW_NUMBER() OVER(ORDER BY <'Order Column here'>)
, *
FROM <'Table Name here'>
)
SELECT *
FROM NumberedTable
WHERE RowNo = <'Record No. here'>
I want to select comments to post, elder then particular commentId, BUT I want to have at least 5 comments in result anyway.
So if there are less then 5 comments is sql : SELECT * FROM comments WHERE id >= :comment_id, I have to make another select SELECT * FROM comments LIMIT 5.
Is it possible to get the same logic in one request?
with c as (
select count(*) as c
from comments
where id >= :comment_id
)
select *
from comments
where id >= :comment_id
union all
(
select *
from comments
where id < :comment_id
order by id desc
limit greatest(5 - (select c from c), 0)
)
;
Try:
WITH x AS {
SELECT * FROM comments WHERE id >= :comment_id
),
y AS (
SELECT * FROM comments
LIMIT 5
)
SELECT * FROM x
WHERE 5 <= ( SELECT count(*) FROM x )
UNION ALL
SELECT * FROM y
WHERE 5 > ( SELECT count(*) FROM x )
I have t-sql as follows:
SELECT (COUNT(Intakes.fk_ClientID) * 100) / (
SELECT count(*)
FROM INTAKES
WHERE Intakes.AdmissionDate >= #StartDate
)
FROM Intakes
WHERE Intakes.fk_ReleasedFromID = '1'
AND Intakes.AdmissionDate >= #StartDate;
I'm trying to get the percentage of clients who have releasedfromID = 1 out of a subset of clients who have a certain range of admission dates. But I get rows of 1's and 0's instead. Now, I can get the percentage if I take out the where clauses, it works:
SELECT (COUNT(Intakes.fk_ClientID) * 100) / (
SELECT count(*)
FROM INTAKES
)
FROM Intakes
WHERE Intakes.fk_ReleasedFromID = '1';
works fine. It selects ClientIDs where ReleasedFromID =1, multiplies it by 100 and divides by total rows in Intakes. But how do you run percentage with WHERE clauses as above?
After reading comment from #Anssssss
SELECT (COUNT(Intakes.fk_ClientID) * 100.0) / (
SELECT count(*)
FROM INTAKES
) 'percentage'
FROM Intakes
WHERE Intakes.fk_ReleasedFromID = '1';
I have written sql statement :
select * from (
select count(*) as NumberofSignals,signals.transmitter_account,signals.class,signals.type,signals.signal_mode,
signals.area_id,signals.sector_id,signals.region_info_id,signals.zone_info_id,signals.user_id,signals.device_id,
signals.panel_name,signals.panel_id,signals.sector_name,signals.region_code,signals.area_name,signals.zone_code,
signals.description,signals.transmitter_name,signals.transmitter_id,signals.color,'event' as Event,get_name(signals.id,'event') as event_value,
'packetnumber' as packetnumber,get_name(signals.id,'packetnumber') as packetnumber_value,wm_concat(distinct get_name(signals.id,'repeater')) as repeater,
round(avg(get_name(signals.id,'signallevel'))) as avg_signallevel,min(to_char(signals.signal_forming_time, 'yyyy/mm/dd hh24:mi:ss')) as formingtime,
get_name(signals.id,'address') as address,get_name(signals.id,'username') as username,get_name(signals.id,'chaneltype') as channeltype,
get_name(signals.id,'code') as code,get_name(signals.id,'account') as account
from signals,signal_custom_fields where signals.id = signal_custom_fields.signal_id and
signals.id in (select id from (select id,rownum num from((select signals.id
from signals,signal_custom_fields where signal_custom_fields.field_name = 'event'
and signal_custom_fields.field_value is not null and signals.id = signal_custom_fields.signal_id
and signals.signal_forming_time >= to_date('2011/5/10 14:34:44', 'yyyy/mm/dd hh24:mi:ss')
AND signals.signal_forming_time <= to_date('2011/5/10 15:34:44', 'yyyy/mm/dd hh24:mi:ss'))
intersect (select distinct signals.id from signals,signal_custom_fields
where signal_custom_fields.field_name = 'packetnumber' and signal_custom_fields.field_value is not null
and signals.id = signal_custom_fields.signal_id
and signals.signal_forming_time >= to_date('2011/5/10 14:34:44', 'yyyy/mm/dd hh24:mi:ss')
AND signals.signal_forming_time <= to_date('2011/5/10 15:34:44', 'yyyy/mm/dd hh24:mi:ss')))
order by id desc)) group by 'event',signals.transmitter_account,signals.class,
signals.type,signals.signal_mode,signals.area_id,signals.sector_id,signals.region_info_id,signals.zone_info_id,
signals.user_id,signals.device_id,signals.panel_name,signals.panel_id,signals.sector_name,signals.region_code,
signals.area_name,signals.zone_code,signals.description,signals.transmitter_name,signals.transmitter_id,
signals.color, get_name(signals.id,'event'), 'packetnumber',get_name(signals.id,'username'),
get_name(signals.id,'chaneltype'),
get_name(signals.id,'code'),
get_name(signals.id,'account'), get_name(signals.id,'packetnumber'),get_name(signals.id,'address'),
TO_CHAR(signals.signal_forming_time ,'dd/mm/yyyy hh24'),
TRUNC(to_number(to_char(signals.signal_forming_time ,'mi'))/(30))
order by event)where rownum < 300
and here i get the first 300 rows, but how i need to rewright this statment to retrieve second 300 rows ???
Your query doesn't have the rownum listed in the first nested table. Add a rownum column in the first nested table then you can do a between function in the where clause at the top level:
--create a demo table
DROP TABLE paging_test;
CREATE TABLE paging_test AS
(SELECT rownum x FROM user_tables
);
--count how many records exist (in my case there is 821)
SELECT COUNT(*)
FROM paging_test;
--get the first 300 rows
SELECT *
FROM
(SELECT rownum rn, x FROM paging_test ORDER BY x
) pt
WHERE pt.rn BETWEEN 1 AND 300 ;
--get the next 300 rows
SELECT *
FROM
(SELECT rownum rn, x FROM paging_test ORDER BY x
) pt
WHERE pt.rn BETWEEN 300 AND 600 ;
You might also be interested in my reference:
References:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:948366252775