面试题与答案

ACID stands for Atomicity, Consistency, Isolation, and Durability. These properties ensure the reliability and integrity of database transactions.

The COMMIT statement is used to permanently save changes made during the current transaction, while ROLLBACK is used to undo the changes.

A transaction in SQLite is a series of one or more SQL statements that are executed as a single unit. Transactions ensure the atomicity, consistency, isolation, and durability of database operations.

The PRAGMA statement in SQLite is used to query or change the operational parameters of the SQLite database engine.

The VACUUM command in SQLite is used to rebuild the database file, optimizing storage and improving performance by cleaning up free space.

You can perform a transaction rollback in SQLite using the ROLLBACK statement: `ROLLBACK;`.

To perform a bulk insert in SQLite efficiently, you can use the INSERT INTO...SELECT statement or the multi-row VALUES syntax to insert multiple rows in a single query.

The ANALYZE command in SQLite is used to gather statistics about the distribution of keys in the tables, which can help the query planner make better optimization decisions.

Normalization in database design is the process of organizing data to reduce redundancy and improve data integrity by dividing large tables into smaller, related tables.

The PRAGMA foreign_key_check command in SQLite is used to check the integrity of foreign key constraints in the database.

You can handle errors and exceptions in SQLite by using the TRY...EXCEPT block in conjunction with the RAISE function to raise a customized error message.

The ANALYZE command in SQLite is used to update the statistics about the distribution of keys in the database, helping the query planner make better optimization decisions.

The EXPLAIN keyword in SQLite is used to obtain information about the execution plan of a SELECT statement, helping to analyze and optimize queries.

The PRAGMA integrity_check command in SQLite is used to check the integrity of the entire database, identifying and reporting any issues with the database structure.

The SAVEPOINT statement in SQLite is used to create a savepoint within a transaction, allowing you to roll back to that point without affecting the entire transaction.