Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 173
  • Last Modified:

SQL Server Query Help

Hello,
I am running 1 query against SQL Server 2005 and Its taking too much time to return and Eating up all the CPU. The problem with the SQL is we have 2 different database on 1 server and doing a Join and query looks something like this...

and seems like A.TNId = B.NPA + B.DBB + B.RDV is causing all the trouble.

Can someone recommend any better approach to handle this without making changes to db structure? B is really big table with some million records in it.
Select Distinct TNid from db1.dbo.Table A ,  Db2.dbo.Table1 B where 
A.CreateDate > b.CreateDate
And A.TNId = B.NPA + B.DBB + B.RDV

Open in new window

0
Aanvik
Asked:
Aanvik
  • 2
  • 2
  • 2
  • +1
1 Solution
 
Bob HoffmanDeveloperCommented:
do you have indexes built on the fields in your where clause?
0
 
AanvikAuthor Commented:
yes, I have non clustered index on these columns.
0
 
Aneesh RetnakaranDatabase AdministratorCommented:
test it after creating an include index   createDate Include (NPA, DBB, RDV)

or else if you can alter the table, add a computed column for  B.NPA + B.DBB + B.RDV and index createdDate (newComputedColumn )
0
What Kind of Coding Program is Right for You?

There are many ways to learn to code these days. From coding bootcamps like Flatiron School to online courses to totally free beginner resources. The best way to learn to code depends on many factors, but the most important one is you. See what course is best for you.

 
TechSingerCommented:
It doesn't appear that you are using a Join statement.  This can really cause things to slow down.
Try the code in the attached snippet.
 

Select Distinct TNid from db1.dbo.Table A 
JOIN  Db2.dbo.Table1 B ON And A.TNId = B.NPA + B.DBB + B.RDV
where A.CreateDate > b.CreateDate

Open in new window

0
 
TechSingerCommented:
Oop, I left the And in.  Let's try that again.
 

Select Distinct TNid from db1.dbo.Table A 
JOIN  Db2.dbo.Table1 B ON A.TNId = B.NPA + B.DBB + B.RDV
where A.CreateDate > b.CreateDate

Open in new window

0
 
Bob HoffmanDeveloperCommented:
Does TNid appear more then once in table 'A'? If not get rid of the "Distinct". If it does can they have a different CreateDate?
0
 
AanvikAuthor Commented:
Thx
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Build your data science skills into a career

Are you ready to take your data science career to the next step, or break into data science? With Springboard’s Data Science Career Track, you’ll master data science topics, have personalized career guidance, weekly calls with a data science expert, and a job guarantee.

  • 2
  • 2
  • 2
  • +1
Tackle projects and never again get stuck behind a technical roadblock.
Join Now