Query runs fast, but runs slow in stored procedure

Question

I am doing some tests using the SQL 2005 profiler.

I have a stored procedure which simply runs one SQL query.

When I run the stored procedure, it takes a lon

Answer 1

The issue of why a batch takes forever to run inside a SQL stored procedure yet runs instantaneously in SSMS has to do with SQL parameter sniffing, especially with datetime parameters.

There are several excellent articles on parameter sniffing out there.

Here's one of them ( I didn't write it, just passing it on).

http://www.sommarskog.se/query-plan-mysteries.html