(word)外企SQL Server面试题.docVIP

外企SQL Server面试题 Question 1：Can you use a batch SQL or store procedure to calculating the Number of Days in a Month　　Answer 1：找出当月的天数select datepart(dd,dateadd(dd,-1,dateadd(mm,1,cast(cast(year(getdate()) as varchar)+-+cast(month(getdate()) as varchar)+-01 as datetime))))　　Question2：Can you use a SQL statement to calculating it!How can I print 10 to 20 for books that sell for between $10 and $20，unknown for books whose price is null, and other for all other prices?　　Answer 2：　　select bookid,bookname,price=case when price is null then 　　unknown when price between 10 and 20 then 10 to 20 else price endfrom books　　Question3：Can you use a SQL statement to finding duplicate 　　values!　　How can I find authors with the same last name?You can use the table authors in datatabase pubs. I want to get the result as below:Output:au_lname number_dups---------------------------------------- -----------Ringer 2(1 row(s) affected)　　Answer 3　　select au_lname,number_dups=count(1) from authors group by au_lname　　Question4：Can you create a cross-tab report in my SQL Server!　　How can I get the report about sale quality for each store and each quarter and the total sale quality for each quarter at year 1993?　　You can use the table sales and stores in datatabase pubs.Table Sales record all sale detail item for each store. Column store_id is the id of each store, ord_date is the order date of each sale item, and column qty is the sale qulity. Table stores record all store information.I want to get the result look like as below:Output:stor_name Total Qtr1 Qtr2 Qtr3 Qtr4 ---------------------------------------- ----------- ----------- ----------- ----------- -----------Barnums 50 0 50 0 0Bookbeat 55 25 30