OCE_Practice_Questions(80)分析和总结最新分析和总结.docx

PAGE PAGE 10 10gSQL I, II 英文考題.doc You You need to load information about new customers from the NEW_CUST table into the tables CUST and CUST_SPECIAL. If a new customer has a credit limit greater than 10,000, then the details have to be inserted into CUST_SPECIAL. All new customer details have to be inserted into the CUST table. Which technique should be used to load the data most efficiently? external table the MERGE command the multitable INSERT command INSERT using WITH CHECK OPTION Answer: C Question: 2 You want to add a constraint on the CUST_FIRST_NAME column of the CUSTOMERS table so that the value inserted in the column does not have numbers. Which SQL statement would you use to accomplish the task? ALTER TABLE CUSTOMERS ADD CONSTRAINT cust_f_name CHECK(REGEXP_LIKE(cust_first_name,'^A-Z')) NOVALIDATE ; ALTER TABLE CUSTOMERS ADD CONSTRAINT cust_f_name CHECK(REGEXP_LIKE(cust_first_name,'^[0-9]')) NOVALIDATE ; ALTER TABLE CUSTOMERS ADD CONSTRAINT cust_f_name CHECK(REGEXP_LIKE(cust_first_name,'[[:alpha:]]')) NOVALIDATE ; ALTER TABLE CUSTOMERS ADD CONSTRAINT cust_f_name CHECK(REGEXP_LIKE(cust_first_name,'[[:digit:]]')) NOVALIDATE ; Answer: C Question: 3 Which three tasks can be performed using regular expression support in Oracle Database 10g? (Choose three.) It can be used to concatenate two strings. It can be used to find out the total length of the string. It can be used for string manipulation and searching operations. It can be used to format the output for a column or expression having string data. It can be used to find and replace operations for a column or expression having string data. Answer: CDE Question: 4 View the Exhibit and examine the structure of the EMP table which is not partitioned and not an index-organized table. Evaluate the following SQL statement: ALTER TABLE emp DROP COLUMN first_name; Which two statements are true regarding the above command? (Choose two.) The FIRST_NAME column would be dropped provided it does not contain any data