Nowcom Interview Questions and Answers

Joins in SQL combine rows from two or more tables based on related columns.

• INNER JOIN: Returns records with matching values in both tables. Example: SELECT * FROM A INNER JOIN B ON A.id = B.id;

• LEFT JOIN: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM A LEFT JOIN B ON A.id = B.id;

• RIGHT JOIN: Returns all records from the right table and matched records from the le...read more

SSIS containers are structures that manage tasks, control flow, and data flow in SQL Server Integration Services packages.

• Task Containers: Group tasks for better organization, e.g., Sequence Container.

• Loop Containers: Execute tasks repeatedly, e.g., For Loop Container.

• Transaction Containers: Manage transactions, ensuring all tasks succeed or fail together.

• Event Handlers: Respond to events like errors or warnings during...read more