To define a string in a variable we are using CHAR and VARCHAR in SQL. CHAR: string(0-255), can store characters of fixed length. eg: CHAR(50) VARCHAR: string(0-255), can store characters up to given ...

If I declare a varchar(1000) for a field and someone enters "hi", I'm wondering how the memory is allocated for it. I was under the impression that varchar2(1000) in Oracle would only allocate space ...

In relational databases, VARCHAR is one of the most commonly used string data types for storing variable-length character data. For users who are unfamiliar, the differences in VARCHAR across ...