A NOT NULL __________ is a rule that prevents certain fields in a database from being left blank.answerscalabilityschemaquery builderconstraint

What is the SQL keyword used to specify that a column can contain NULL values?OptionsWITH NULLSALLOW NULLNOT NULLNULL ABLE

Select the correct answerWhich SQL constraint do we use to set some value to a field whose value has not been added explicitly?OptionsNOT NULLUNIQUEDEFAULTCHECK

Not Null can not be used along other constraint in a column of a table

Which of the following is not Constraint in SQL? (amazon)Options: Pick one correct answer from belowPrimary KeyNot NullCheckUnion

Which of the following are considered as constraints?Select one or more:a.Checkb.NULLc.NOT NULLd.Unique