What are the questions asked in interview for MySQL?

Intermediate MySQL Interview Questions

• What are MySQL “Views”?
• How do you create and execute views in MySQL?
• What are MySQL Triggers?
• How many Triggers are possible in MySQL?
• What is the MySQL server?
• What are the MySQL clients and utilities?
• What are the types of relationships used in MySQL?

How will you write an SQL query to fetch the count of the employee working in project Q1?

How will you write an SQL Query to fetch the count of the employee working in project “Q1”?

1. SELECT COUNT(*)
2. FROM Employee Salary.
3. WHERE Project = “Q1”;

What are MySQL queries?

MySQL query is any command that used to retrieve the data from a table. MySQL can be used for querying the data, filtering data, sorting data, joining the tables, grouping data, modifying the data.

What is trigger in MySQL?

A trigger in MySQL is a set of SQL statements that reside in a system catalog. It is a special type of stored procedure that is invoked automatically in response to an event. Each trigger is associated with a table, which is activated on any DML statement such as INSERT, UPDATE, or DELETE.

How increase MySQL speed?

MySQL Performance Tuning and Optimization Tips

1. Balance the Four Main Hardware Resources.
2. Use InnoDB, Not MyISAM.
3. Use the Latest Version of MySQL.
4. Consider Using an Automatic Performance Improvement Tool.
5. Optimize Queries.
6. Use Indexes Where Appropriate.
7. Functions in Predicates.
8. Avoid \% Wildcard in a Predicate.

What is the query to fetch first record from employee table in SQL Server?

To get the first and last record, use UNION. LIMIT is also used to get the number of records you want.

What is CLOB in MySQL?

CLOB stands for Character Large Object. in general, an SQL Clob is a built-in datatype which is used to store large amount of textual data. Using this datatype, you can store data up to 2,147,483,647 characters. MYSQL database provides support Clob datatype TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT.

What is MySQL Mediumtext?

MEDIUMTEXT: 16,777,215 – 16 MB The MEDIUMTEXT data object is useful for storing larger text strings like white papers, books, and code backup. These data objects can be as large as 16 MB (expressed as 2^24 -1) or 16,777,215 characters and require 3 bytes of overhead storage.