Which of the following statements is true?Group of answer choicesAn alternate key is a super key with redundant attributes.Every candidate key is a super key.Every super key is a candidate key.A composite key cannot be a primary key

What is a candidate key?Group of answer choicesA super key with no redundant attributes.A key that can have duplicate values.A key that is always used as a primary key.A key that contains a composite of two or more foreign keys.

Which of the following statements are TRUE?All superkeys are candidate keysAll candidate keys are superkeysA foreign key can be a primary keyAll superkeys are primary key

Which of the following is true about a primary key?Group of answer choicesIt is not necessary for a primary key to be unique.It must be unique for each record in the table.It can contain NULL values.A table can have multiple primary keys.

Question: How many of the following statements are true? 1)It is possible to have two candidate keys with different numbers of attributes. 2) A composite key has more than 1 attribute. 3) The computer picks the primary key used in the design. 4) A relationship has a primary key. 5) An attribute has a primary key. A) 0 B) 1 C) 2 D) 3 E) 4

Which of the statement(S) are incorrect w.r.t primary key in SQL. A. A primary key can contain duplicate values to ensure redundancy.B. A primary key can be a composite key, consisting of multiple columns.C. A primary key must be an auto-increment field.D. A primary key cannot be null