[The Oracle] Data Type

• Four Basic Types

  • Character
  • Numeric
  • Date type
  • Large Object Type

• Character

  • char fixed maximum 2000 characters
  • varchar2 variable length character, up to 4000
  • nchar / nvarchar2 national character set
  • raw 2-band maximum 2G
  • The variable length string of up to 2G LONG

• Numeric

  • number (p, s) inside accuracy up to 38
  • int integer

• Date type

  • Common forms of seconds date Date
  • extended precision timestamp date of decimal 9
  • timestamp with timezone with time zone
  • timestamp with local timezone time zone conversion costs to date

• char and nchar