mysql 练习题

with temp1 as (
select 1 as id ,111 as barCode,'A1' name  union 
select 2 as id ,112 as barCode,'A2' name union 
select 3 as id ,200 as barCode,'B1' name union 
select 4 as id ,230 as barCode,'B2' name union 
select 5 as id ,140 as barCode,'B3' name 
), temp2 as (
select 1 as id ,112 as barCode,10 as Amount,'2013-10-20' Dates  union 
select 2 as id ,112 as barCode,20 as Amount,'2013-12-20' Dates union 
select 3 as id ,200 as barCode,25 as Amount,'2014-01-08' Dates union 
select 4 as id ,230 as barCode,30 as Amount,'2014-03-15' Dates union 
select 5 as id ,112 as barCode,40 as Amount,'2014-08-7' Dates union
select 5 as id ,230 as barCode,70 as Amount,'2014-09-01' Dates 

)




/*
select t2.barCode,t1.name,t2.Amount,t2.dates
from temp2 t2 inner join temp1 t1 on t2.barCode=t1.barCode
where t1.name like 'B%' and DATES >'2014-01-01' ;
*/

/*
select  t2.barCode,t1.name,sum(t2.amount) cnt
from temp2 t2 left  join temp1 t1 on t2.barCode=t1.barCode
group by t2.barcode
*/

/*
select  t2.barCode,t1.name,count(1) cnt
from temp2 t2 left  join temp1 t1 on t2.barCode=t1.barCode
group by t2.barcode
having count(t2.barCode)>1
*/