This is the default command. It should be used when it is possible that given id may be one of the other command keywords. A datasource may be added to the system, reconfigured, or removed. Driver argument specifies the driver to be used and the attributes argument a list of driver specific attribute name and value pairs. This form of database command does not create a connection to the database, even if one is added.
Connection is created with some of the commands described above.
Database Object Interface Database object is a dynamically allocated object, created by the database command. The object provides the following methods. The methods are called as commands after the database object identifier. Almost all necessary functionality can be provided through this simple syntax. The given SQL-clause is executed in the DBMS, and the result, if any, is returned in a tcl list.