Learn about the core concepts of database transactions that control how data is stored in your Oracle database, how to make DML changes persistent using the COMMIT command and when changes can be rolled back using the ROLLBACK command.
- [Instructor] In our previous video,…we saw how we can use the Oracle commit and rollback…commands to control the end state of transactions.…Either make the changes persistent, using commit,…or rollback the changes, undo the changes,…using the rollback command.…As we've mentioned, commit and rollback…control the end states of transactions.…Let's explore transactions in greater details.…A transaction is an autonomous unit of work in Oracle,…where data is modified.…
For example, when you run insert,…update, or delete commands,…that is, DML commands,…you run them inside a transaction.…When you connect to the Oracle database,…and run your first DML command,…a transaction will be implicitly created,…and the transaction will be closed…when you either issue a commit, or rollback, command.…So for example, typing:…insert into test_table1…values ('hello',1)…and running this insert command will essentially…open a new transaction in the database.…
Any subsequent insert commands that we will issue,…will all be part of the same transaction.…
Note: This training course is appropriate for beginning database developers with no prior experience with SQL or Oracle.
- Using Oracle SQL*Developer, the free development environment
- Selecting data from tables
- Filtering data
- Using functions to manipulate data
- Joining data from tables
- Creating tables
- Updating values
- Truncating data
- Grouping and ordering result sets
- Working with primary keys
- Checking constraints
Skill Level Beginner
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1. Introduction to SQL
2. Preparing the Course Environment
Downloading the course VM2m 16s
3. Using Oracle SQL Developer
4. Basic SELECT Queries
5. String, Number, and Date Functions
6. Joining Table Data
7. Manipulating Data
8. Grouping Data
9. Advanced Topics
Next steps1m 33s
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