Alternative SQL Data type Oracle Equivalent Data type
CHARACTER ( size ) CHAR ( size )
CHAR ( size ) CHAR ( size )
CHARACTER VARYING ( size ) VARCHAR ( size )
CHAR VARYING ( size ) VARCHAR ( size )
NATIONAL CHARACTER ( size ) NCHAR ( size )
NATIONAL CHAR ( size ) NCHAR ( size )
NCHAR ( size ) NCHAR ( size )
NATIONAL CHARACTER VARYING ( size ) NVARCHAR2 ( size )
NATIONAL CHAR VARYING ( size ) NVARCHAR2 ( size )
NCHAR VARYING ( size ) NVARCHAR2 ( size )