Apriso Developer Interview Questions and Answers

The PRIMARY KEY constraint uniquely identifies each row in a table and must contain unique values.

• A primary key is a column or a combination of columns that uniquely identifies each row in a table.

• It ensures data integrity by preventing duplicate or null values in the primary key column(s).

• Primary keys are used to establish relationships between tables through foreign keys.

• Primary keys can be composed of a single column or multiple columns.

• Example: In a table of employees, th...read more

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

• Primary key ensures each record in a table is unique.

• It is used to establish relationships between tables.

• Primary key can be a single column or a combination of columns.

• It enforces data integrity and allows efficient data retrieval.

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