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হোম›একাদশ-দ্বাদশ শ্রেণি›English Version›Information and Communication Technology›C-06 — Database Management System›C-06-Q028

C-06-Q028mediumsingle_mcq

What is a primary key?

aA column that can uniquely identify each record of the table
bA column that stores only text data
cThe first row of every table
dA column borrowed from another table

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এই অধ্যায়ের আরও প্রশ্ন

C-06-Q029When multiple columns are combined to create a primary key, it is called a —
C-06-Q030Why can a student's name NOT serve as a primary key?
C-06-Q031Which attribute makes an 'id' column automatically increase its value by 1 each time a new row is added?
C-06-Q032Consider the following statements about the student table: Which of the following is correct?
C-06-Q033Why is an 'id' column with auto increment commonly added when no suitable primary key exists?
C-06-Q034According to the chapter, what is true about a primary key in a relational database?
C-06-Q035Why can using class + section + roll number as a composite key cause a problem when keeping records of passed-
C-06-Q036Every adult in Bangladesh has a unique National Identification (NID) number. Why can the NID be used as a prim
C-06-Q037Database relation refers to the relation between —
C-06-Q038How many types of database relations are mentioned in the chapter?

C-06 — Database Management System — সব প্রশ্ন দেখুন (143টি) →