VARCHAR is variable-length. CHAR is fixed length. If your content is a fixed size, you'll get better performance with CHAR. See the MySQL page on CHAR and VARCHAR Types for a detailed explanation (be sure to also read the comments).
27 The main difference between Varchar(n) and nvarchar(n) is: Varchar ( Variable-length, non-Unicode character data) size is upto 8000. It is a variable length data type Used to store non-Unicode characters Occupies 1 byte of space for each character Nvarchar: Variable-length Unicode character data. It is a variable-length data type
1 char and varchar actually becomes irrelevant if you have just 1 variable length field in your table, like a varchar or text. Mysql will automatically change all char to varchar. The fixed length/size record can give you extra performance, but you can't use any variable length field types.
What is meant by nvarchar? What is the difference between char, nchar, varchar, and nvarchar in SQL Server?
What is the difference between char, nchar, varchar, and nvarchar in ...
Qual a diferença entre usar os tipos de dados varchar e nvarchar? nvarchar existe em todo banco de dados SQL? Existe alguma diferença significante de performance entre ambos? Existe um critério ...
What is the meaning of varchar(-1) in SQL Server 2008? Is it an alternative for varchar(max)?
VARCHAR is reserved by Oracle to support distinction between NULL and an empty string in the future, as ANSI standard prescribes. VARCHAR2 does not distinguish between a NULL and an empty string, and never will.
I have variable length character data and want to store in SQL Server (2005) database. I want to learn some best practices about how to choose TEXT SQL type or choose VARCHAR SQL type, pros and con...