Learn how transactions can improve reliability and performance in complex operations by combining a group of operations into one unit of work.
- [Instructor] In database terminology,…a transaction is a group of operations…that are handled as one unit of work.…In practice, this means that you may have…many operations and if any of these operations fails…the entire group of operations is treated as failed…and the database is restored to its state…before the group of operations was started.…For example, imagine a financial application…where several tables need to be updated…for a given transaction.…If any of these operations fail,…the corresponding data in the other tables…would be out of sync and invalid.…
By combining all these actions into a single transaction,…the state of the database will automatically…be rolled back to a valid state…if any of the individual operations fails.…Transactions are also used to ensure…that concurrent operations result in a state…as if they were handled sequentially.…In other words, if your database is used…by many clients at the same time…and they are all conducting similar complex operations…grouped into transactions,…those transactions will affect the database…
- 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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