Tagged Questions
4
votes
2answers
176 views
Performance on SQL Join
I have a query which takes ages to run mainly due to a join between 2 tables on a PK and FK.
The Key is prefixed with 2 letters (which is always the same, RN) followed by 7 digits
So RN1234567 for ...
8
votes
1answer
316 views
Forcing an index spool
I know its something that should be avoided for performance reasons, but am trying to show a condition where it appears as a demo on how to make sure it does not appear.
However, I end up with a ...
2
votes
1answer
124 views
How are foreign keys resolved when creating tables in batch?
I am creating a database version management tool with the goal of being able to recreate a database from scratch using text/sql files contained in source control. As part of establishing a baseline ...
0
votes
1answer
222 views
Query performance and join hints, plan cost, and duration
Having some trouble identifying why a query's duration would decrease when using OPTION (HASH JOIN) or OPTION (MERGE JOIN), although plan cost increases.
Background
I have a reporting database using ...
2
votes
2answers
673 views
Why is query using Clustered Index when it shouldn't?
Let us presume I have a table named Category in a SQL Server 2005 database. Category has category_id (bigint, identity) as its primary key and name (nvarchar(50)). There is obviously a clustered ...
