多項(xiàng)選擇題

Which two statements are true regarding single row functions?（）

A.They accept only a single argument
B.They can be nested only to two levels
C.Arguments can only be column values or constants
D.They always return a single result row for every row of a queried table
E.They can return a data type value different from the one that is referenced

你可能感興趣的試題

多項(xiàng)選擇題

You need to generate a list of all customer last names with their credit limits from the CUSTOMERS table. Those customers who do not have a credit limit should appear last in the list. Which two queries would achieve the required result?（）

A.SELECT cust_last_name, cust_credit_limit FROM customers ORDER BY cust_credit_limit DESC
B.SELECT cust_last_name, cust_credit_limit FROM customers ORDER BY cust_credit_limit
C.SELECT cust_last_name, cust_credit_limit FROM customers ORDER BY cust_credit_limit NULLS LAST
D.SELECT cust_last_name, cust_credit_limit FROM customers ORDER BY cust_last_name, cust_credit_limit NULLSLAST

多項(xiàng)選擇題

Where can subqueries be used?（）

A.field names in the SELECT statement
B.the FROM clause in the SELECT statement
C.the HAVING clause in the SELECT statement
D.the GROUP BY clause in the SELECT statement
E.the WHERE clause in only the SELECT statement
F.the WHERE clause in SELECT as well as all DML statements

99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

Which two statements are true regarding single row functions?（）

你可能感興趣的試題

You need to generate a list of all customer last names with their credit limits from the CUSTOMERS table. Those customers who do not have a credit limit should appear last in the list. Which two queries would achieve the required result?（）

Where can subqueries be used?（）

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精