SQL Multiple choices

Total available count: 51
Subject - Databases
Subsubject - SQL

The NOT NULL constraint enforces a column to not accept null values.







SQL NOT NULL Constraint

By default, a column can hold NULL values. The NOT NULL constraint enforces a column to NOT accept NULL values. This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding a value to the particular field.

The following SQL ensures that the "ID", "SubCourseName", and "CourseName" columns will NOT accept NULL values when the "Slightbook" table is created:


CREATE TABLE Slightbook (ID int NOT NULL, CourseName varchar(255) NOT NULL, SubCourseName varchar(255) NOT NULL, Duration int);


Next 5 multiple choice(s)


Which operator is used to select values within a range?


What is the most common type of join?


With SQL, how can you return the number of records in the "Persons" table?


With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table?


How can you change "Hansen" into "Nilsen" in the "LastName" column in the Persons table?