Using Transactions in SQL
Transactions allow you to group multiple operations into a single unit of work. This ensures that all operations complete successfully before committing the changes to the database.
Syntax
The basic syntax for using transactions in SQL is:
BEGIN
INSERT INTO Students (NAME, YEAR) VALUES (‘E’,40);
END
Transactions are important for maintaining data integrity.
In this example, we insert a value into the Students table, but you can add any operation.
Purpose
Transactions are essential to ensure data consistency. For example, they allow:
- Reverting changes in case of an error.
- Grouping related operations to ensure all of them complete.
- Maintaining referential integrity in the database.
Exercises
Interactive Test 1: Drag and Drop
Arrange the transaction statements in the correct order. Drag the items to the corresponding spaces.
Drag in the corresponding order.
Drag the options:
BEGIN
INSERT INTO Students (NAME, YEAR) VALUES (JOHN,40);
END
Completa el código:
______
______
______
Interactive Test 2: Fill in the Blanks
Complete the following SQL code using the appropriate terms.
Fill the Blanks.
BEGIN; INSERT Students (NAME, YEAR) (‘JOHN’,40); END