Triggering criteria are formulae that allow additional conditions to be defined on the main and linked tables. Freely named variables will receive calculated values each time the trigger is called.

• 你可以自己给变量命名,这个变量在每次触发器被调用时会被重新计算。这个变量也是在后面统计参数窗口的字段卡片页中变量行定义中将被用到,通过右键可以选择这些变量。