In the world of relational databases, VARCHAR is one of the most commonly used string data types, primarily used for storing variable-length character data. However, for many beginners, the ...

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 ...

サービスを作成する時に、 文字型を使わずに作成することはあまりないと思います。MySQLを使った場合でも、 サービスを作成しようとした時には、 やはり文字列型を使うことになります。その際に間違えやすいのがCHAR型とVARCHAR型です。2つの型は似た名前 ...

18 July, 2012. It was a Wednesday. Doing a deployment last night, I ran into an issue around indexing performance around SQL columns of type varchar. Varchar is the ANSI version of character data – ...

Your browser does not support the audio element. Quite often in my practice, I see people use varchar fields with a small and limited number of available options. Let ...