Which is the best query in these?

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Table " Ledger" is having huge number of records.
Account ID is FK (not indexed),
ID is PK

which one is the best way to get faster result?
Its taking 00:00:01 seconds for both query

SQL

SELECT TOP 1 OpeningBal FROM Ledger
WHERE AccountID=123456 
ORDER BY ID DESC

OR

SQL

SELECT OpeningBal FROM Ledger
 WHERE ID = (SELECT MAX(ID) FROM Ledger WHERE AccountID=123456 );

What I have tried:

SQL

SELECT TOP 1 OpeningBal FROM Ledger
WHERE AccountID=123456 
ORDER BY ID DESC

AND

SQL

SELECT OpeningBal FROM Ledger
 WHERE ID = (SELECT MAX(ID) FROM Ledger WHERE AccountID=123456 );

Posted 8-Nov-17 18:45pm

Sadique KT

Updated 23-Nov-17 23:50pm

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Comments

Santosh kumar Pithani 9-Nov-17 1:14am

"SET STATISTICS IO ON ;SET STATISTICS TIME ON " which were help you to find out which query is taking less time CPU time and elapsed time.

Sadique KT 9-Nov-17 1:47am

Thanks... that's given the idea..

Santosh kumar Pithani 9-Nov-17 2:05am

Welcome

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RDBurmon · Accepted Answer · 2017-11-23T23:50:00

Solution 1

actually first one is the best

SELECT TOP 1 OpeningBal FROM Ledger
WHERE AccountID=123456 
ORDER BY ID DESC

and yes I would also suggest to

"SET STATISTICS IO ON ;SET STATISTICS TIME ON

Posted 23-Nov-17 23:50pm

RDBurmon

Comments

Sadique KT 24-Nov-17 12:07pm

Thank you...