December 2014
Intermediate to advanced
852 pages
17h 57m
English
Content preview from Joe Celko's SQL for Smarties, 5th Edition
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Chapter 35
Temporal Queries
Abstract
Temporal data is the hardest type of data for people to handle conceptually. Perhaps, time is difficult because it is dynamic and all other data types are static or perhaps because time allows multiple parallel events.
Keywords
DATE
Derek Dongray
EXTRACT()
Holidays
ISO-8601 Standard
ISO week
Julian date
Ordinal date
Report period
Rudy Limeback
TIME
TIMESTAMP
TIMEZONE_HOUR
TIMEZONE_MINUTE
Zeller's algorithm
Y2K (year 2000)
Temporal data is the hardest type of data for people to handle conceptually. Perhaps time is difficult because it is dynamic and all other data types are static or perhaps because time allows multiple parallel events. This is an old puzzle that still catches people.
If a hen and a half ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.