In Microsoft SQL Server and PostgresSQL PostGIS, each column, local variable, expression, and parameter has a related data type, which is an attribute that specifies the type of data (integer, character, money, and so on) that the object can hold.
SQL Server supplies a set of system data types that define all of the types of data that can be used with SQL Server. The set of system-supplied data types is shown in this section along with information for PostgresSQL / PostGIS.