Why databases over files in SQL - Quick Recap

Recall & Review

beginner

What is one main advantage of using databases instead of plain files for storing data?

Databases allow easy searching, sorting, and filtering of data, which is difficult and slow with plain files.

beginner

How do databases help with multiple users accessing data compared to files?

Databases manage multiple users safely at the same time, preventing data conflicts, while files can get corrupted if many users write at once.

intermediate

Why is data consistency easier to maintain in databases than in files?

Databases use transactions to ensure data changes are complete and correct, avoiding partial updates that can happen with files.

intermediate

What feature of databases helps recover data after a crash that files usually lack?

Databases have backup and recovery tools that can restore data to a consistent state after failures, unlike simple files.

beginner

How do databases improve data organization compared to files?

Databases store data in structured tables with relationships, making it easier to organize and connect data than flat files.

Which of the following is a key reason to use a database over a file for data storage?

A Databases allow multiple users to access data safely at the same time.

B Files are faster to search than databases.

C Files automatically prevent data corruption.

D Databases cannot handle large amounts of data.

Databases are designed to handle multiple users safely, while files can get corrupted if accessed by many users simultaneously.

What does a database use to ensure data changes are complete and correct?

A File locks

B Transactions

C Manual editing

D Backup copies

Transactions in databases ensure that data changes happen fully or not at all, maintaining consistency.

Which feature helps databases recover data after a crash?

A Manual file copying

B File compression

C Backup and recovery tools

D Simple text format

Databases include backup and recovery tools to restore data after failures.

How is data organized in a database compared to files?

A As plain text only

B Without any structure

C In random order

D In structured tables with relationships

Databases organize data in tables with defined relationships, making data easier to manage.

Why might searching data be faster in a database than in a file?

A Databases use indexes to speed up searches.

B Files are always encrypted.

C Files have built-in search engines.

D Databases store data as plain text.

Databases create indexes that allow quick searching, unlike plain files.

Explain why databases are preferred over files for managing data in applications.

Think about how many people use the data and how the data stays correct and safe.

Describe how data organization differs between databases and files.

Consider how data is stored and connected.