推荐回答(3个)
关系型数据库是以一行来表示一条数据的,而不是一列。你要得出的那个表格,一行没有任何意义。
代码仅作参考:
declare @count0 int;
declare @count1 int;
declare @count2 int;
declare @count3 int;
if(object_id('TableA') is not null) drop table TableA
select getdate() as createTime, 产品名称 into TableA from [表名] where 销售金额 >=200 and 销售金额 <= 599;
if(object_id('TableB') is not null) drop table TableB
select getdate() as createTime, 产品名称 into TableB from [表名] where 销售金额 >=600 and 销售金额 <= 899;
if(object_id('TableC') is not null) drop table TableC
select getdate() as createTime, 产品名称 into TableC from [表名] where 销售金额 >=900 ;
select @count1 = count(1) from TableA;
select @count2= count(1) from TableB;
select @count3= count(1) from TableC;
set @count0 = @count1;
if @count0<@count2
begin
set @count0 = @count2;
end
if @count0<@count3
begin
set @count0 = @count3;
end
declare @i int;
set @i = 0;
while(@count1+@i)<@count0
begin
insert into TableA values(getdate(),'');
set @i = @i+1;
end
SET @i=0;
while(@count2+@i)<@count0
begin
insert into TableB values(getdate(),'');
set @i = @i+1;
end
SET @i=0;
while(@count3+@i)<@count0
begin
insert into TableC values(getdate(),'');
set @i = @i+1;
end
select a.产品名称 as '200到599',b.产品名称 as '600到899',c.产品名称 as '900以上'
from (select row_number() over(order by createTime) as rownum, 产品名称 from TableA) a
left join
(select row_number() over(order by createTime) as rownum, 产品名称 from TableB) b on a.rownum = b.rownum
left join
(select row_number() over(order by createTime) as rownum, 产品名称 from TableC) c on c.rownum = b.rownum
select max(case when 销售金额 between 200 and 599 then 产品名称 else null end) 价格200到599,
max(case when 销售金额 between 600 and 899 then 产品名称 else null end) 价格600到899,
max(case when 销售金额 > 900 then 产品名称 else null end) 价格900以上
from 表名 ;
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