Thehive.ai Data Analyst Interview Questions and Answers

SQL query for XYZ scenario

• Use SELECT statement to retrieve data from the table

• Use WHERE clause to filter data based on the XYZ scenario

• Consider using JOIN if data from multiple tables is needed

A temporary table is a table that is created and exists only for the duration of a database session.

• Temporary tables are typically used to store intermediate results during a complex query or to isolate data for a specific task.

• They are automatically dropped when the session ends or when the table is explicitly dropped.

• Temporary tables are often prefixed with a '#' or '##' to differentiate them from permanent tabl...read more

A trigger function in SQL is a stored procedure that is automatically executed in response to certain events on a particular table.

• Triggers can be set to execute before or after INSERT, UPDATE, or DELETE operations on a table.

• They are useful for enforcing business rules, auditing changes, and maintaining data integrity.

• Example: CREATE TRIGGER audit_trigger AFTER INSERT ON employees FOR EACH ROW EXECUTE PROCEDURE a...read more

A primary key is a unique identifier for each record in a database table.

• A primary key must contain unique values for each record in the table.

• It cannot contain null values.

• It can consist of one or multiple columns.

• Example: In a table of students, the student ID can be a primary key.

A Database Management System (DBMS) is a software that allows users to create, retrieve, update, and manage data in a database.

• DBMS helps in organizing and structuring data efficiently

• It provides tools for data manipulation, querying, and security

• Examples include MySQL, Oracle, SQL Server