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MySQL Pertanyaan dan Jawaban Wawancara

Test your skills through the online practice test: MySQL Quiz Online Practice Test

Ques 16. What Is Row?

A row is a unit of data with related data items stored as one item in one column in a table.

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Ques 17. What Is Primary Key?

A primary key is a single column or multiple columns defined to have unique values that can be used as row identifications.

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Ques 18. What Is Foreign Key?

A foreign key is a single column or multiple columns defined to have values that can be mapped to a primary key in another table.

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Ques 19. What Is Index?

An index is a single column or multiple columns defined to have values pre-sorted to speed up data retrieval speed.

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Ques 20. What Is View?

A view is a logical table defined by a query statement.

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