June 2010
Intermediate to advanced
328 pages
7h 51m
English
Content preview from SQL Antipatterns
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Chapter 13Index Shotgun
Whenever any result is sought by its aid, the question will then arise—By what course of calculation can these results be arrived at by the machine in the shortest time?
Charles Babbage,
Passages from the Life of a Philosopher (1864)
“Hey! You got a minute? I could use your help,” the Oklahoman accent on the phone is shouting over the data center ventilation. It’s the lead database administrator for your company.
“Sure,” you answer, a little unsure what he could want.
“The thing is, you’ve got a database here that’s pretty much taken over the server,” the DBA continues. “I got in there to take a look, and I see the problem. You’ve got no indexes on some tables and every index in the world on some other tables. ...
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