Question

I have a table (SQL 2000) with over 10,000,000 records. Records get added at a rate of approximately 80,000-100,000 per week. Once a week a few reports get generated from the data. The reports are typically fairly slow to run because there are few indexes (presumably to speed up the INSERTs). One new report could really benefit from an additional index on a particular ‘char(3)’ column.

I’ve added the index using Enterprise Manager (Manage Indexes -> New -> select column, OK), and even rebuilt the indexes on the table, but the SELECT query has not sped up at all. Any ideas?

Update:

Table definition:

ID, int, PK Source, char(3)  <--- column I want indexed ... About 20 different varchar fields ... CreatedDate, datetime Status, tinyint ExternalID, uniqueidentifier 

My test query is just:

select top 10000 [field list] where Source = 'abc' 

Answer 1

You need to look at the query plan and see if it is using that new index – if it isnt there are a couple things. One – it could have a cached query plan that it is using that has not been invalidated since the new index was created. If that is not the case you can also trying index hints [ With (Index (yourindexname)) ].

10,000,000 rows is not unheard of, it should read that out pretty fast.