You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schema. Examine the following steps: 1. Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS (‘SH’, ‘CUSTOMERS’) FROM dual statement. 2. Execute the DBMS_STATS.SEED_COL_USAGE (null, ‘SH’, 500) procedure. 3. Execute the required queries on the CUSTOMERS table. 4. Issue the SELECT DBMS_STATS.REPORT_COL_USAGE (‘SH’, ‘CUSTOMERS’) FROM dual statement. Identify the correct sequence of steps.（） 3，2，1，4。 2，3，4，1。 4，1，3，2。 3，2，4，1。
In a typical production environment， which server（s） hosts the application ？（） Node Server。 Administration Server。 Managed Server。 Configuration Server。
依据《气瓶安全监察规程》库存或停用时间超过一个检验周期的气瓶，启用前应（）。 进行检验。 直接使用。 请示领导后决定。
脱甲烷塔正常工作下的操作压力和温度为（） 1.0MPa，-19～-107度。 1.31MPa，67～129度。 0.945MPa，-19～-107度。
You are developing the Payroll application that contains the SALARY and COMMISSION forms. When a user invoked the COMMISSION form from the SALARY form, the SAL value should be passed to the COMMISSION form. In which data form and at what time should you define the parameter to accept the value?（） SALARY form at runtime. 。 SALARY form at design time. 。 COMMISSION form at runtime. 。 COMMISSION form at design time.&e。
影响消费者购买行为的内在条件有（）
