Introduction
Top 10:- Questions and Answers for improving and understanding MySQL Database. Learn and Understand MySQL Database like Pro.
1. Question: What is MySQL?
Answer: MySQL is an open-source relational database management system (RDBMS) that is commonly used for managing and storing structured data.
2. Question: What is the purpose of SQL in MySQL?
Answer: SQL (Structured Query Language) is used in MySQL to interact with databases, perform data manipulation, and retrieve information.
3. Question: How do you create a new database in MySQL?
Answer: You can create a new database in MySQL using the CREATE DATABASE SQL statement, like this: CREATE DATABASE mydatabase;
4. Question: What is a primary key in a MySQL table?
Answer: A primary key is a unique identifier for each record in a MySQL table. It ensures that each row in the table is unique.
5. Question: How do you retrieve all records from a MySQL table?
Answer: To retrieve all records from a table, you can use the SELECT * FROM tablename; SQL query.
6. Question: What is the purpose of the "WHERE" clause in a MySQL query?
Answer: The "WHERE" clause is used to filter records in a MySQL query based on specified conditions.
7. Question: How do you insert data into a MySQL table?
Answer: Data can be inserted into a MySQL table using the INSERT INTO SQL statement, followed by the table name and values to insert.
8. Question: What is a foreign key in MySQL?
Answer: A foreign key is a field in a MySQL table that is used to establish a link between two tables, enforcing referential integrity.
9. Question: How do you update records in a MySQL table?
Answer: To update records in a MySQL table, you can use the UPDATE SQL statement with the SET clause to specify new values and the WHERE clause to specify which records to update.
10. Question: What is the purpose of indexing in MySQL?
kotlin**Answer:** Indexing in MySQL improves the speed of data retrieval operations by creating a data structure that allows for faster searching and sorting of data.
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