SELECT field
FROM table
GROUP BY field
HAVING condition-expression
SELECT aggregatefunc(field %AFTERHAVING)
FROM table
[GROUP BY field]
HAVING condition-expression
InterSystems的产品包括Caché/Ensemble/Health Connect/IRIS/IRIS for Health,均基于进程,当它们及在它们之上开发的应用运行时,您能在操作系统上看到大量cache/irisdb进程。下面以InterSystems IRIS为例,来说明下InterSystems产品的内存使用。