What is the reason not to use select *?

Question

I\'ve seen a number of people claim that you should specifically name each column you want in your select query.

Assuming I\'m going to use all of the columns anyway

Answer 1

Selecting only the columns you need keeps the dataset in memory smaller and therefor keeps your application faster.

Also, a lot of tools (e.g. stored procedures) cache query execution plans too. If you later add or remove a column (particularly easy if you're selecting off a view), the tool will often error when it doesn't get back results that it expects.