Center workstation tests and controls field equipments, dynamically display technical process, field data and alarm, production information for statisticalquery.
中心工作站检测和控制现场设备，动态显示工艺流程和现场数据并报警，统计查询生产信息等。
2
Query drill down allows you to gather statistical information about each SQL statement executed on the system and analyze statement history.
可以通过查询钻取特性收集关于系统上执行的每个sql语句的统计信息并分析语句历史。
3
Using the same sample data just discussed above, the following illustrates the difference in cardinality estimates with and without the use of statistical view for the query.