How to create fast database queries

Archive for November 11th, 2009

SQL Server: clustered index and ordering

with 2 comments

From Stack Overflow:

My table (SQL Server 2008) has more than 1 million records.

When I try to order records by datetime, it takes 1 second, but when I order by id (integer), it only takes about 0.1 second.

Is there any way to improve the efficiency?

The obvious answer would be create an index on datetime

However, everything's not so simple.

Let's create a sample table and see why:
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Written by Quassnoi

November 11th, 2009 at 11:00 pm

Posted in SQL Server