You can use the IS NULL or IS NOT NULL operators to filter or select records based on their NULL status. For example, if you want to find all the customers who have not provided their email ...

Not operator:the sql not operator is used to reverse a condition in a sql query. it is used with select, delete, update, or insert statement. it can be used with other operators like between, in , ...

Null values:null values denotes missing data in a table or a database. if a column does not have any not null constraint then for that column there can be null values. by default a column can have ...