suddenly query executing slowly - sql

Question

I have very typical situation where I'm doing wrong. I have query which have executed fast initially but later on it taking loads of time to execute ..
My query :
Declare
#fromdate varchar(20) = '01/01/2014',
#todate varchar(20)= '27/05/2015',
#SERVICE_ID CHAR(5) = '123'
DECLARE #FDATE DATETIME ,
#TDATE DATETIME
SET #FDATE = (CONVERT(DATETIME,#fromdate,103))
SET #TDATE = (CONVERT(DATETIME,#todate,103))
IF OBJECT_ID('tempdb..#RUID') IS NOT NULL
DROP TABLE #RUID
CREATE TABLE #RUID(
OFFICEID INT,
OFFICE_TITTLE INT,
MAIN_OFFICE_TITTLE VARCHAR(50),
RLB_NAME VARCHAR(20),
DIST_NAME INT,
district_description VARCHAR(30))
CREATE CLUSTERED INDEX IDX_C_RUID_ID ON #RUID(OFFICEID)
CREATE NONCLUSTERED INDEX IDX_RUID_Name ON #RUID(OFFICE_TITTLE,DIST_NAME)INCLUDE(district_description)
INSERT INTO #RUID
SELECT OFFICEID,
OFFICE_TITTLE,
MAIN_OFFICE_TITTLE,
RLB_NAME,
DIST_NAME,
D.district_description
FROM APSDC..DISTRICT D
INNER JOIN cdma..Unified_RUID_WARD_MSTR I WITH(NOLOCK)
ON D.CDMA_DistrictID = I.DIST_NAME
WHERE RLB_NAME in(3) AND I.STATEID ='01'
select C.MAIN_OFFICE_TITTLE AS 'OFFICE_TITTLE',C.officeid, C.DIST_NAME AS DistrictName, C.district_description,
ISNULL(count(I.ApplicationNumber),0) 'Total_Trans',
isnull(sum(case when Data_Available='Y' AND DataTampered = 'N' then 1 else 0 end),0) 'CategoryA'
from #RUID c with(nolock)
LEFT JOIN Unified_BirthDeathAppDetails I WITH(NOLOCK) ON
(C.OFFICE_TITTLE=I.RUID AND C.DIST_NAME=I.DistrictName)
AND I.Service_Type= '01' AND
(DATEADD(DD,0,DATEDIFF(DD,0,I.Created_Date))) BETWEEN #FDATE AND #TDATE
AND NOT EXISTS(select application_number from reversal_details WITH(NOLOCK) WHERE ApplicationNumber <> i.ApplicationNumber AND service_id='123' )
group by C.MAIN_OFFICE_TITTLE,C.officeid, C.DIST_NAME,C.district_description
order by C.district_description ,C.MAIN_OFFICE_TITTLE
I have tried with #temp table and table variable but it is not even showing any result set. But the same query executed in 2 secs now it is taking lot of time. I have tried UPDATE Statstics on this tables and I have checked with locking also. What I need to do I have followed every other peformance optimized techinique.

Answer 1

Try:
Declare
#FDate Date = '01/01/2014',
#TDate Date= '27/05/2015',
#SERVICE_ID CHAR(5) = '123'
;WITH RUID
AS
(
SELECT OFFICEID,
OFFICE_TITTLE,
MAIN_OFFICE_TITTLE,
RLB_NAME,
DIST_NAME,
D.district_description
FROM APSDC..DISTRICT D
INNER JOIN cdma..Unified_RUID_WARD_MSTR I
ON D.CDMA_DistrictID = I.DIST_NAME
WHERE RLB_NAME in(3) AND I.STATEID ='01'
),
AppDetails
AS
(
SELECT ApplicationNumber,
CASE WHEN Data_Available='Y' AND DataTampered = 'N'
THEN 1
ELSE 0
END CategoryA
FROM Unified_BirthDeathAppDetails I
WHERE I.CreateDate >= #FDate AND I.CreatedDate < #TDate AND
NOT EXISTS
( select application_number
FROM reversal_details
WHERE I.Service_Type= '01' AND
ApplicationNumber <> i.ApplicationNumber AND
service_id= #Service_iD
)
)
SELECT C.MAIN_OFFICE_TITTLE AS OFFICE_TITTLE
,C.officeid, C.DIST_NAME AS DistrictName
, C.district_description
,ISNULL(count(I.ApplicationNumber),0) Total_Trans
,isnull(sum(CategoryA),0) CategoryA
FROM RUID c
LEFT JOIN AppDetails I
ON C.OFFICE_TITTLE=I.RUID AND C.DIST_NAME=I.DistrictName
GROUP BY C.MAIN_OFFICE_TITTLE
,C.officeid
,C.DIST_NAME
,C.district_description
ORDER BU C.district_description
,C.MAIN_OFFICE_TITTLE
Make sure you have decent indexes on RLB_name, StateId, CDMA_DistrictId, Dist_Name, CreatedDate etc.