Ramco Systems Interview Questions, Process, and Tips

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

• INNER JOIN returns only the matching rows from both tables

• LEFT JOIN returns all rows from the left table and matching rows from the right table

• RIGHT JOIN returns all rows from the right table and matching rows from the left table

• FULL OUTER JOIN returns all rows from both tables, with NULL values in the columns where there is no match

• CR...read more

Normalization is the process of organizing data in a database to reduce redundancy and dependency.

• Normalization helps in improving data consistency and accuracy.

• It involves breaking down a large table into smaller tables and defining relationships between them.

• Normalization is achieved through a series of normal forms, such as First Normal Form (1NF), Second Normal Form (2NF), and so on.

• Each normal form has a set of ru...read more

Normalization is a process of organizing data in a database to reduce redundancy and dependency.

• First Normal Form (1NF)

• Second Normal Form (2NF)

• Third Normal Form (3NF)

• Boyce-Codd Normal Form (BCNF)

• Fourth Normal Form (4NF)

• Fifth Normal Form (5NF) or Project-Join Normal Form (PJNF)