[SQL] char vs varchar vs varchar2

char The char data type is used to store the character values. It is a fixed-length data type i.e once initialized we cannot change the size at execution time. Hence, it is also called a Static datatype. char는 고정된 길이만큼 사용하는 정적 데이터 타입 varchar The VarChar data type is used to store the character values. It is a variable-length data type i.e we can change the size of the character at the time of th..