gs gs117 SQL: Queries, Constraints and Triggers - Null Values Operations - Quiz No.1
gs gs117 Database Management System Quiz
This quiz belongs to book/course code gs gs117 Database Management System of gs organization. We have 92 quizzes available related to the book/course Database Management System. This quiz has a total of 10 multiple choice questions (MCQs) to prepare and belongs to topic SQL: Queries, Constraints and Triggers. NVAEducation wants its users to help them learn in an easy way. For that purpose, you are free to prepare online MCQs and quizzes.
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Select name from instructor where salary is not null; Selects Create table employee (id integer,name varchar(20),salary not null); Insert into employee values (1005,Rach,0); Insert into employee values (1007,Ross, ); Insert into employee values (1002,Joey,335);Some of these insert statements will produce an error. Identify the statement.
select nvl (100 / quantity, none) from inventory;Why does this statement cause an error when QUANTITY values are null?
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