In database testing, the primary purpose of test scripting is to automate the execution of tests. Test scripts are written to perform specific actions on the database and verify the expected outcomes. Automating tests helps in improving efficiency, reducing human errors, and ensuring consistency in testing processes.

Parameterization involves using parameterized queries to separate SQL code from user input. This technique helps prevent SQL injection attacks by automatically escaping special characters.

Transformation is the stage in ETL (Extract, Transform, Load) process where data is converted or modified according to business rules and requirements before loading it into the target system.