UltraLite User's Guide
The Embedded SQL Interface
The SQL Communication Area
Using multiple SQLCAs
You do not need to use multiple SQLCAs to have more than one connection to a single database.
Each SQLCA can have one unnamed connection. Each SQLCA has an active or current connection. All operations on a given database connection must use the same SQLCA that was used when the connection was established.
For more information, see SET CONNECTION statement [Interactive SQL] [ESQL].