sql data type

SQL Server CHAR

SQL Server CHAR data type is used to store non-Unicode string data of fixed-length.

SQL SERVER VARCHAR

SQL Server VARCHAR Data Type is used to store non-unicode string data of varaible length.

SQL Server VARCHAR VS NVARCHAR

What is the difference Between VARCHAR and NVARCHAR data types?

SQL sp_help

SQL Sp_help is part of database engine stored procedures ,which returns information about a database object or a data type.