Sams Teach Yourself SQL in 24 Hours, Third Edition By Ronald R. Plew, Ryan K. Stephens
Table of Contents
Part III. Getting Effective Results from Queries
Hour 12. Understanding Dates and Times
In this hour, you will learn about the nature of dates and time in SQL. Not only does this hour discuss the DATETIME data type in more detail, but you will also see how some implementations use dates, some of the common rules, and how to extract the date and time in a desired format.
The highlights of this hour include
Understanding dates and time
How date and time are stored
Typical date and time formats
How to use date functions
How to use date conversions
As you know by now, there are many different SQL implementations. This book shows the ANSI standard and the most common nonstandard functions, commands, and operators. Oracle is used for the examples. Even in Oracle, the date can be stored in different formats. You must check your particular implementation for the date storage. No matter how it is stored, your implementation should have functions that convert date formats.
