Specify Data Types Available In System. A data type is an attribute that specifies the type of data that the object can hold. DT_WSTR Unicode string ProdName.
SQL Server supplies a set of system data types that define all the types of data that can be used with SQL Server. DT_I2 two-byte signed integer ReorderPoint. A specific category of information eg student records personally identifiable information protected health information financial records etc.
Variables can store data of different types and different types can do different things.
Subsequent chapters will show you how to use different data types in different situations. In programming data type is an important concept. Integer character money date and time binary and so on. Subsequent chapters will show you how to use different data types in different situations.
