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select emp_no,emp_name,dept,isnull(convert(char(10),birthday,120),'ÈÕÆÚ²»Ïê') birthday
from employee
order by dept
--2¡¢²éÕÒÓëÓ÷×ÔÇ¿ÔÚͬһ¸öµ¥Î»µÄÔ±¹¤ÐÕÃû¡¢ÐԱ𡢲¿ÃźÍÖ°³Æ
select emp_no,emp_name,dept,title
from employee
where emp_name'Ó÷×ÔÇ¿' and dept in
(select dept from employee
where emp_name='Ó÷×ÔÇ¿')
--3¡¢°´²¿ÃŽøÐлã×Ü£¬Í³¼ÆÃ¿¸ö²¿ÃŵÄ×ܹ¤×Ê
select dept,sum(salary)
from employee
group by dept
--4¡¢²éÕÒÉÌÆ·Ãû³ÆÎª14´çÏÔʾÆ÷ÉÌÆ·µÄÏúÊÛÇé¿ö£¬ÏÔʾ¸ÃÉÌÆ·µÄ±àºÅ¡¢ÏúÊÛÊýÁ¿¡¢µ¥¼ÛºÍ½ð¶î
select a.prod_id,qty,unit_price,unit_price*qty totprice
from sale_item a,product b
where a.prod_id=b.prod_id and prod_name='14´çÏÔʾÆ÷'
--5¡¢ÔÚÏúÊÛÃ÷ϸ±íÖа´²úÆ·±àºÅ½øÐлã×Ü£¬Í³¼ÆÃ¿ÖÖ²úÆ·µÄÏúÊÛÊýÁ¿ºÍ½ð¶î
select prod_id,sum(qty) totqty,sum(qty*unit_price) totprice
from sale_item
group by prod_id
--6¡¢Ê¹ÓÃconvertº¯Êý°´¿Í»§±àºÅͳ¼ÆÃ¿¸ö¿Í»§1996ÄêµÄ¶©µ¥×ܽð¶î
select cust_id,sum(tot_amt) totprice
from sales
where convert(char(4),order_date,120)='1996'
group by cust_id
--7¡¢²éÕÒÓÐÏúÊۼǼµÄ¿Í»§±àºÅ¡¢Ãû³ÆºÍ¶©µ¥×ܶî
select a.cust_id,cust_name,sum(tot_amt) totprice
from customer a,sales b
where a.cust_id=b.cust_id
group by a.cust_id,cust_name
--8¡¢²éÕÒÔÚ1997ÄêÖÐÓÐÏúÊۼǼµÄ¿Í»§±àºÅ¡¢Ãû³ÆºÍ¶©µ¥×ܶî
select a.cust_id,cust_name,sum(tot_amt) totprice
from customer a,sales b
where a.cust_id=b.cust_id and convert(char(4),order_date,120)='1997'
group by a.cust_id,cust_name
--9¡¢²éÕÒÒ»´ÎÏúÊÛ×î´óµÄÏúÊۼǼ
select order_no,cust_id,sale_id,tot_amt
from sales
where tot_amt=
(select max(tot_amt)
from sales)
--10¡¢²éÕÒÖÁÉÙÓÐ3´ÎÏúÊÛµÄÒµÎñÔ±Ãûµ¥ºÍÏúÊÛÈÕÆÚ
select emp_name,order_date
from employee a,sales b
where emp_no=sale_id and a.emp_no in
(select sale_id
from sales
group by sale_id
having count(*)>=3)
order by emp_name
--11¡¢ÓôæÔÚÁ¿´Ê²éÕÒûÓж©»õ¼Ç¼µÄ¿Í»§Ãû³Æ
select cust_name
from customer a
where not exists
(select *
from sales b
where a.


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