EXECUTE IMMEDIATE — dynamically prepare and execute a statement
EXECUTE IMMEDIATE string
     EXECUTE IMMEDIATE immediately prepares and
     executes a dynamically specified SQL statement, without
     retrieving result rows.
    
stringA literal C string or a host variable containing the SQL statement to be executed.
     Here is an example that executes an INSERT
     statement using EXECUTE IMMEDIATE and a host
     variable named command:
sprintf(command, "INSERT INTO test (name, amount, letter) VALUES ('db: ''r1''', 1, 'f')");
EXEC SQL EXECUTE IMMEDIATE :command;
     EXECUTE IMMEDIATE is specified in the SQL standard.