Question:- How Can You Retrieve A Particular Number Of Records From A Table?
Answer:- A LIMIT clause is used with the SQL statement to retrieve a particular number of records from a table. From which record and how many records will be retrieved are defined by the LIMIT clause.
Question:- How Can You Count The Total Number Of Records Of Any Table?
Answer:- COUNT() function is used to count the total number of records of any table.
Question:- What Is A Storage Engine? What Are The Differences Between InnoDB And MyISAM Engines?
Answer:- One of the major components of MySQL server is the storage engine for doing different types of database operations. Each database table created is based on the specific storage engine MySQL supports two types of storage engine i.e. transactional and non-transactional. InnoDB is the default storage engine of MySQL which is a transactional storage engine. MyISAM storage engine is a non-transactional storage engine.
Question:- How Can You Display The Maximum Salary In SQL?
Answer:- To display the maximum salary in SQL, you can use the inbuilt function called MAX().
Question:- How To Display Nth Highest Salary From A Table In A MySQL Query?
Answer:- Query: SELECT DISTINCT(salary)FROM employee ORDER BY salary DESC LIMIT n-1,1 So if you want to find out the 2nd highest salary, consider the below query. SELECT DISTINCT(salary) FROM employee ORDER BY salary DESC LIMIT 1,1
Question:- What Is SQL Query To Find The Maximum Salary Of Each Department?
Answer:- SELECT dept_id, MAX(salary) FROM employee GROUP BY dept_id;
Question:- How Do You Find All Employees With Their Managers?(Consider There Is A Manager Id Also In Employee Table)
Answer:- SELECT m.emp_name as Employee, e.emp_name as Manager FROM employee e, employee m WHERE m.manager_id =e.id;
Question:- How To Find The Count Of Duplicate Rows?
Answer:- SELECT id, COUNT(id) from employee Group by id Having COUNT(id)>1 Order by COUNT (id) desc;
Question:- How To Remove Duplicate Rows From The Table?
Answer:- DELETE e FROM employee e INNER JOIN employee e2 WHERE e.id < e2.id AND e.emp_name = e2.emp_name AND e.dept_id = e2.dept_id;
Question:- In Which Language Is MySQL Written?
Answer:- MySQL is written in C and C++ programming and SQL parser written in yacc.
Question:- How Do You Start MySQL On Linux?
Answer:- /etc/init.d/mysql start command is used to start MySQL on Linux.
Question:- Explain The Difference Between MySQL And MySQL Interfaces In PHP.
Answer:- • Mysqli is the object-oriented version of mysql library functions used in PHP. • Mysql_connect() • Mysqli_connect()
Question:- What Does The Tee Command Do In MySQL?
Answer:- Tee followed by a filename turns on MySQL logging to a specified file. It can be stopped by a command note.
Question:- How Do You Change The Password For An Existing User In MySQLAdmin?
Answer:- Mysqladmin -u root -p password “newpassword”