CHAR vs VARCHAR

CHAR:

  1. It is a fixed length data type
  2. Used to store non-Unicode characters
  3. Occupiers 1 byte of space for each character

VARCHAR:

  1. It is a variable length data type
  2. Used to store non-Unicode characters
  3. Occupies 1 byte of space for each character

NCHAR vs NVARCHAR

NCHAR

  1. Is a fixed length data type
  2. Used to store Unicode characters (for example the languages Arabic, German and so on)
  3. Occupies 2 bytes of space for each character

NVARCHAR

  1. It is a variable-length data type
  2. Used to store Unicode characters
  3. Occupies 2 bytes of space for each character

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