Which two changes and their effect on the system can be tested by using the Database Replay feature？（） multiplexing of the control file。 adding the redo log member to the database。 database and operating system upgrades。 changing the database storage to ASM-managed storage。
充装民用液化石油气的气瓶字样为（）。 液化气；。 液化石油气；。 液化混合气；。
Examine the data in the EMPLOYEES table. EMPLOYEES EMP_NAME DEPT_ID MGR_ID JOB_ID SALARY EMPLOYEE_ID 101 Smith 20 120 SA_REP 4000 102 Martin 10 105 CLERK 2500 103 Chris 20 120 IT_ADMIN 4200 104 John 30 108 HR_CLERK 2500 105 Diana 30 108 IT_ADMIN 5000 106 Smith 40 110 AD.ASST 3000 108 Jennifer 30 110 HR_DIR 6500 110 Bob 40 EK_DIR 8000 120 Revi 20 110 SA_DIR 6500 On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. The JOB_ID column is a NOT NULL column. Evaluate this DELETE statement: DELETE employee_id, salary, job_id FROM employees WHERE dept_id = 90; Why does the DELETE statement fail when you execute it?（） There is no row with dept_id 90 in the EMPLOYEES table.。 You cannot delete the JOB_ID column because it is a NOT NULL column.。 You cannot specify column names in the DELETE clause of the DELETE statement.。 You cannot delete the EMPLOYEE_ID column because it is the primary key of the table.。
What is the result？（） 7。 49。 343。 Compilation fails.。 An exception is thrown at runtime.。
开孔机中心钻钻杆的作用是（） 取鞍型板。 定位。 切削。 支撑刀具。
Identify four features of WebLogic that provide value above and beyond a simple Java EE container.（）
