Apriso Developer

Apriso Developer Interview Questions and Answers

Updated 7 Jul 2025

Asked in ITC Infotech

5d ago

Q. The PRIMARY KEY constraint uniquely identifies each row in a table. It must contain UNIQUE values and has an implicit NOT NULL constraint. A table in SQL is strictly restricted to have one and only one primary...

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Ans.

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

Asked in TCS

2d ago

Q. What is a Primary Key?

Ans.

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.

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L&T Technology Services Limited (LTTS) logo
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