SET CONNECTION
Name
SET CONNECTION -- select a database connection
Synopsis
SET CONNECTION [ TO | = ] connection_name
Description
SET CONNECTION sets the "current" database connection, which is the one that all commands use unless overridden. 
Parameters
- connection_name
  A database connection name established by the CONNECT command. 
- DEFAULT
  Set the connection to the default connection. 
Examples
EXEC SQL SET CONNECTION TO con2;
EXEC SQL SET CONNECTION = con1;
Compatibility
SET CONNECTION is specified in the SQL standard.