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select
emp_no,emp_name,dept,isnull(convert(char(10),birthday,120),'ÈÕÆÚ²»Ïê') birthday
from employee
order by dept
 
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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¿') 
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3¡¢°´²¿ÃŽøÐлã×Ü£¬Í³¼Æÿ¸ö²¿ÃŵÄ×ܹ¤×Ê
select dept,sum(salary)
from employee
group by dept
 
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4¡¢²éÕÒÉÌÆ·Ãû³ÆΪ14´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÷' 
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5¡¢ÔÚÏúÊÛÃ÷ϸ±íÖа´²úÆ·±àºÅ½øÐлã×Ü£¬Í³¼ÆÿÖÖ²úÆ·µÄÏúÊÛÊýÁ¿ºÍ½ð¶î
select prod_id,sum(qty) totqty,sum(qty*unit_price) totprice
from sale_item
group by prod_id
 
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6¡¢Ê¹ÓÃconvertº¯Êý°´¿Í»§±àºÅͳ¼Æÿ¸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 
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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 
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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 
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select order_no,cust_id,sale_id,tot_amt
from sales
where tot_amt=
(select max(tot_amt)
from sales) 
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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 
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