I read the derived tables have better performance than temporary tables, but anyway many SQL Server developers prefer the second ones. Why? I must do queries with large data (millions records) and I ...
Today I implemented a monitoring solution on our SQL server using Cacti and the first thing i noticed is the growth in the number of temporary tables, in just 3 hours on our test system we had an ...
I was recently working in a very slow stored procedure (took 5 minutes to run). I made a very small tweak from doing this: declare @tempTable table ( ... ) insert into @tempTable select ..... to ...
In the following example the performance of the first version using only one SQL query is very bad. The problem is the last join. When I store the result of the left side into a temporary table and ...