CHAR Datatype

The CHAR datatype stores fixed-length character strings. When you create a table with a CHAR column, you must specify a string length (in bytes or characters) between 1 and 2000 bytes for the CHAR column width. The default is 1 byte. Oracle then guarantees that:

·         When you insert or update a row in the table, the value for the CHAR column has the fixed length.

·         If you give a shorter value, then the value is blank-padded to the fixed length.

·         If a value is too large, Oracle Database returns an error.

Oracle Database compares CHAR values using blank-padded comparison semantics.