Don’t Use Select *

Kevin Feasel

2016-03-29

T-SQL

Kenneth Fisher warns against using SELECT * in queries:

Typing a * sounds a lot easier than actually listing all of the columns you need. However is that really a good idea? You’ll hear lots of people saying it isn’t, but why?

Well there are several reasons.

Read on for his reasons.

Related Posts

Considerations when Deleting Lots of Data

Ed Elliott takes us through things to think about before deleting a few million rows from a table: FragmentationFragmentation occurs when we delete from pages, and there is still data surrounding our data. If we have 100 rows and delete every odd row, we would have perfect fragmentation in that we have doubled the size […]

Read More

Puzzling Through Older Problems

Kenneth Fisher shares a couple of interview puzzles: The year is 2004. You’re taking a tech test as an interview for a SQL development job. They have a page in their application that displays up to 20 rows of information. They need a piece of code that will return the rows from a given page. […]

Read More

Categories

March 2016
MTWTFSS
« Feb Apr »
 123456
78910111213
14151617181920
21222324252627
28293031