choose two
The CUSTOMERS table has a CUST_CREDT_LIMIT column of date type number.
Which two queries execute successtully?
A) SELECT TO_CHAR(NVL(cust_credit_limit * .15,\'Not Available\')) FROM customers;
B) SELECT NVL2(cust_credit_limit * .15,\'Not AvailabIe\') FROM customers;
C) SELECT NVL(cust_credit_limit * .15, \'Not Available\') FROM customers;
D) SLECT NVL(TO_CHAR(cust_credit_limit * .15),\'Not available\') from customers;
E) SELECT NVL2(cust_credit_limit,TO_CHAR(cust_credit_limit * .15),\'NOT Available\') FROM customers;
Answer:DE
(解析：注意 nvl 返回的数据类型要与原来列的数据类型一致。此题库以前出现过。)