Operation Support Executive Interview Questions and Answers

A group by clause is used in SQL to group rows with the same values into summary rows.

• It is used with the SELECT statement.

• It is followed by one or more columns to group the result set by.

• It is often used with aggregate functions like COUNT, SUM, AVG, etc.

• It can be used to generate summary reports.

• Example: SELECT column1, COUNT(column2) FROM table_name GROUP BY column1;

Joins in SQL are used to combine data from two or more tables based on a related column.

• Joins are used to retrieve data from multiple tables in a single query.

• There are different types of joins such as inner join, left join, right join, and full outer join.

• The join condition is specified using the ON keyword and the related columns.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;

DDL and DML are SQL commands used to manipulate databases. DDL is used to create, modify, and delete database objects, while DML is used to manipulate data within those objects.

• DDL stands for Data Definition Language and includes commands like CREATE, ALTER, and DROP.

• DDL commands are used to create, modify, and delete database objects like tables, indexes, and views.

• DML stands for Data Manipulation Language and includes commands like SELECT, INSERT, UPDATE, and DELETE.

• DML com...read more

Yes, I am open to taking unplanned leaves if necessary.

• I understand the importance of work-life balance and the need for occasional time off.

• I will ensure that I communicate any unplanned leaves in advance and make necessary arrangements to minimize any impact on the team or operations.

• Examples: personal emergencies, sudden illness, family commitments, etc.