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Questions and Answers
Which category of SQL commands allows you to modify data in a database?
Which category of SQL commands allows you to modify data in a database?
- DML (Data Manipulation Language) (correct)
- DDL (Data Definition Language)
- TCL (Transaction Control Language)
- DQL (Data Query Language)
What does the COMMIT command do?
What does the COMMIT command do?
- Permanently saves changes made by DML commands (correct)
- Retrieves data from a database table
- Defines a new savepoint in a transaction
- Rolls back changes to the last committed state
Which command allows you to undo changes made since the last COMMIT or SAVEPOINT?
Which command allows you to undo changes made since the last COMMIT or SAVEPOINT?
- SELECT
- SAVEPOINT
- COMMIT
- ROLLBACK (correct)
What does the SAVEPOINT command do?
What does the SAVEPOINT command do?
Which SQL statement is used to retrieve data from a database table?
Which SQL statement is used to retrieve data from a database table?
If you execute a DML command like UPDATE, and then realize the changes were not required, what command would you use to undo those changes?
If you execute a DML command like UPDATE, and then realize the changes were not required, what command would you use to undo those changes?
Which SQL command category allows you to define database structures like tables and indexes?
Which SQL command category allows you to define database structures like tables and indexes?
What is the purpose of the DCL (Data Control Language) category of SQL commands?
What is the purpose of the DCL (Data Control Language) category of SQL commands?
Which SQL command category allows you to manage transactions and control the permanence of changes?
Which SQL command category allows you to manage transactions and control the permanence of changes?
If you want to jump to a specific savepoint in an ongoing transaction, which command would you use?
If you want to jump to a specific savepoint in an ongoing transaction, which command would you use?
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