多项选择题
Which three statements are true regarding the data types in Oracle Database 10g/11g?（）
A.Only one LONG column can be used per table
B.A TIMESTAMP data type column stores only time values with fractional seconds
C.The BLOB data type column is used to store binary data in an operating system file
D.The minimum column width that can be specified for a VARCHAR2 data type column is one
E.The value for a CHAR data type column is blank-padded to the maximum defined column width
相关考题
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多项选择题
Whichtwostatementsaretrueregardingsubqueries?（）
A.A subquery can retrieve zero or more rows
B.Only two subqueries can be placed atone level
C.A subquery can be used only in SQL query statements
D.A subquery can appear on either side of a comparison operator
E.There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement -
多项选择题
Whichtwostatementsaretrueregardingsinglerowfunctions?（）
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 -
多项选择题
YouneedtogeneratealistofallcustomerlastnameswiththeircreditlimitsfromtheCUSTOMERStable.Thosecustomerswhodonothaveacreditlimitshouldappearlastinthelist.Whichtwoquerieswouldachievetherequiredresult?（）
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
