普通硅酸盐水泥使用于（）。 反复冻融的工程。 高强度混凝土。 受海水浸蚀的工程。 大体积混凝土。
You want to be notified when the space usage of an existing critical tablespace has reached 75% of the allocated space. Which option would you use to achieve this？（） run a procedure to check the tablespace space usage。 define the warning threshold for the tablespace at 75% in Database Control。 create a trigger to be executed when tablespace space usage reaches 75%。 submit a job by using DBMS_JOB package to check the free space in the tablespace at regular intervals。 define the warning threshold to be 75% for the tablespace by ALTER TABLESPACE .. ADD THRESHOLD command。
申请人对驳回申请不服或者被申请人对人身安全保护令不服的，可以自裁定生效之日起（）日内向作出裁定的人民法院申请复议一次。人民法院依法作出人身安全保护令的，复议期间不停止人身安全保护令的执行。 五。 十。 十五。
衡量计算机及网络安全的主要指标是（） 保密性、及需性、完整性。 保密性、完整性、不可否认性。 完整性、保密性、可用性。 完整性、保密性、辨识性。
Examine the data in the EMPLOYEES and DEPARTMENTS tables: Also examine the SQL statements that create the EMPLOYEES and DEPARTMENTS tables: On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. DEPT_ID is foreign key to DEPARTMENT_ID column of the DEPARTMENTS table. On the DEPARTMENTS table, DEPARTMENT_ID is the primary key. Examine this DELETE statement: What happens when you execute the DELETE statement?（） Only the row with department ID 40 is deleted in the DEPARTMENTS table.。 The statement fails because there are child records in the EMPLOYEES table with department ID 40.。 The row with department ID 40 is deleted in the DEPARTMENTS table. Also the rows with employee IDs 110 and 106 are deleted from the EMPLOYEES table.。 The row with department ID 40 is deleted in the DEPARTMENTS table. Also the rows with employee IDs 106 and 110 and the employees working under employee 110 are deleted from the EMPLOYEES table.。 The row with department ID 40 is deleted in the DEPARTMENTS table. Also all the rows in the EMPLOYEES table are deleted.。 The statement fails because there are no columns specifies in the DELETE clause of the DELETE statement.。
You have not configured Oracle Managed Files （OMF） in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature.
Which statement should you use to enable the block change tracking feature？（）
