Learn how dates and times are a vital part of many database applications. While SQL does have a standard format, date and time functions vary widely from system to system.
- [Narrator] Dates and times have specific properties…that are important to understand in database systems.…They can be used for chronological…and durational values as well as for time stamps…or other meta data within a system or application.…Dates are typically represented in the SQL standard format…with the most significant parts of the date…to the left and the least significant to the right.…This lends itself well to database…sorting and searching operations.…Dates and times are usually represented internally as UTC.…
UTC is technically equivalent to Greenwich Mean Time…or the current date and time at Greenwich, England…without adjusting for summertime.…This standardization allows unambiguous…relative date and time calculations…across local and international boundaries.…UTC is easily converted to and from local time zones…for reporting and display purposes.…The SQL standard does not specify types for dates and times.…Most database systems have special types…set aside for dates and times.…
These types are generally represented…
- Understanding SQL terminology and syntax
- Creating new tables
- Inserting and updating data
- Writing basic SQL queries
- Sorting and filtering
- Accessing related tables with JOIN
- Working with strings
- Understanding numeric types
- Using aggregate functions and transactions
- Automating data with triggers
- Creating views
- Defining functions in PHP
Skill Level Beginner
2. SQL Overview
3. Fundamental Concepts
7. Dates and Times
Dates and times1m 52s
11. Views and Subselects
12. Defined Functions
13. A Simple CRUD Application
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