Secondary Navigation. 1  Active Duty Dental Care. 2  Guard/Reserve Dental Care. 3  TRICARE Dental Program. 4  TRICARE Retiree Dental Program. 5  Enrolling in the TRICARE Retiree Dental Program. Costs. 6  Dental Benefits for Survivors. 7  Find a Dentist.
â¢ Although char and varchar are character data fields, char is a fixed length data field and varchar is a variable size data field. â¢ Char can store only fixed size non-Unicode string characters, but varchar can store variable sizes of strings.
All replies. 1  Hi Anil, Answers to this questions are basic, and I will speak in SQL Server perspective because this is not C# question, although varchar, char, nvarchar and nchar are not resreved only for SQL Server (many RDBMS uses same or similar types - like for example MySQL).