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
selectdatepart(dd,dateadd(dd,-1,dateadd(mm,1,cast(cast(year(getdate()) asvarchar)+'-'+cast(month(getdate()) as varchar)+'-01' as datetime))))
Question2：Can you use a SQL statement to calculating it!
Howcan 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 otherprices?
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 end
from 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!
Howcan I get the report about sale quality for each store and each quarterand the total sale quality for each quarter at year 1993?
You can use the table sales and stores in datatabase pubs.
TableSales record all sale detail item for each store. Column store_id isthe id of each store, ord_date is the order date of each sale item, andcolumn qty is the sale qulity. Table stores record all storeinformation.
I want to get the result look like as below:
Output:
stor_name Total Qtr1 Qtr2 Qtr3 Qtr4
---------------------------------------- ----------- ----------- ----------- ----------- -----------
Barnum's 50 0 50 0 0
Bookbeat 55 25 30 0 0
Doc-U-Mat: Quality Laundry and Books 85 0
