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Technical Articles

Database

Mysql Tutorial

How do you choose appropriate data types for different columns?

Article discusses choosing appropriate data types for database columns, focusing on analysis, performance, and integrity. Incorrect choices can harm performance and data integrity.

Mar 19, 2025 pm 03:49 PM

How do you represent relationships using foreign keys?

Article discusses using foreign keys to represent relationships in databases, focusing on best practices, data integrity, and common pitfalls to avoid.

Mar 19, 2025 pm 03:48 PM

What are savepoints in MySQL transactions?

Savepoints in MySQL provide granular control over transactions, allowing partial rollbacks to manage complex operations effectively.

Mar 19, 2025 pm 03:44 PM

How do you start, commit, and rollback transactions?

The article discusses managing database transactions, focusing on starting, committing, and rolling back transactions using SQL commands like BEGIN, COMMIT, and ROLLBACK. It emphasizes ensuring data integrity through ACID compliance and best practice

Mar 19, 2025 pm 03:43 PM

What are ACID properties?

ACID properties ensure reliable database transactions through Atomicity, Consistency, Isolation, and Durability, maintaining data integrity and preventing errors.

Mar 19, 2025 pm 03:42 PM

How do you use transactions in MySQL to ensure data consistency?

The article discusses using MySQL transactions to ensure data consistency, detailing steps for managing transaction failures and concurrent transactions.

Mar 19, 2025 pm 03:41 PM

How do you use the REPLACE statement in MySQL?

The article discusses the REPLACE statement in MySQL, its syntax, and usage for inserting or updating rows. It highlights common mistakes to avoid, benefits for data management, and performance implications.

Mar 19, 2025 pm 03:40 PM

How do you use the TRUNCATE statement? What is the difference between TRUNCATE and DELETE?

The article discusses the use of the TRUNCATE statement in SQL for efficiently removing all records from a table. It compares TRUNCATE with DELETE, detailing performance differences and usage scenarios, and explains rollback possibilities and data re

Mar 19, 2025 pm 03:39 PM

How do you delete data from a table using the DELETE statement?

The article explains the SQL DELETE statement for removing records from a table, emphasizing the importance of the WHERE clause to target specific rows. It discusses precautions to prevent data loss, such as backing up data and using transactions, an

Mar 19, 2025 pm 03:38 PM

How do you update data in a table using the UPDATE statement?

The article discusses the use of the UPDATE statement in SQL to modify table records, detailing syntax, clauses like WHERE, JOIN, IN, EXISTS, and data integrity precautions.Character count: 159

Mar 19, 2025 pm 03:37 PM

How do you insert data into a table using the INSERT statement?

The article discusses using the INSERT statement in SQL to add data into tables, detailing syntax, methods for specifying values, and precautions for data integrity.

Mar 19, 2025 pm 03:36 PM

What is the difference between UNION and UNION ALL?

The article discusses UNION and UNION ALL in SQL, focusing on their differences in handling duplicates, performance, and usage with multiple tables.

Mar 19, 2025 pm 01:28 PM

How do you join tables using the JOIN clause? What are the different types of joins (INNER, LEFT, RIGHT, FULL)?

The article discusses using the JOIN clause in SQL to combine data from multiple tables, detailing INNER, LEFT, RIGHT, and FULL JOIN types. It explains their syntax and practical differences, guiding on choosing the appropriate JOIN for specific data

Mar 19, 2025 pm 01:27 PM

How do you filter grouped data using the HAVING clause?

The article explains how to use the HAVING clause in SQL to filter grouped data based on aggregate functions, contrasting it with the WHERE clause, and discusses using HAVING without GROUP BY and combining multiple conditions in HAVING.Word count: 15

Mar 19, 2025 pm 01:26 PM