统计不连续卡号问题

问题

/*
问题：***统计不连续卡号问题****
数据库中有一批卡，怎样统计出每种卡的起止卡号，比如
卡种类   面值      卡号
 ===========================
 电费卡    50       00111111
 电费卡    50       00111112
 电费卡    50       00111113
 电费卡    50       00111114
 电费卡    50       00111119
 电费卡    50       00111120
 电费卡    50       00111121
 电费卡    50       00111122
 移动卡    50       10111110
 移动卡    50       10111111
 移动卡    50       10111112
 移动卡    50       10111113
 电费卡    100      0110111112
 电费卡    100      0110111113
 电费卡    100      0110111114

期望得到的结果：
 卡种类   面值    张数  开始卡号      结束卡号
 ===========================================
 电费卡    50      4     00111111       00111114
 电费卡    50      4     00111119       00111122
 电费卡    100     3     0110111113     0110111114
 移动卡    50      4     10111110       10111113
*/

SQL

--sql
create table #card (cardtype varchar(20),cardvalue int,cardno varchar(20))
insert into #card
select '电费卡','50','00111111'
union all select '电费卡','50','00111112'
union all select '电费卡','50','00111113'
union all select '电费卡','50','00111114'
union all select '电费卡','50','00111119'
union all select '电费卡','50','00111120'
union all select '电费卡','50','00111121'
union all select '电费卡','50','00111122'
union all select '移动卡','50','10111110'
union all select '移动卡','50','10111111'
union all select '移动卡','50','10111112'
union all select '移动卡','50','10111113'
union all select '电费卡','100','0110111112'
union all select '电费卡','100','0110111113'
union all select '电费卡','100','0110111114'

select ROW_NUMBER() over (order by t1.cardno),t1.* from #card t1

select convert(bigint,t.cardno)-no as type,t.* from (
select ROW_NUMBER() over (order by t1.cardno) as no,t1.* from #card t1 ) t

select type,cardtype,cardvalue,COUNT(*),MIN(cardno),MAX(cardno)
from (
select convert(bigint,t.cardno)-no as type,t.* from (
select ROW_NUMBER() over (order by t1.cardno) as no,t1.* from #card t1 ) t
) tt
group by type,cardtype,cardvalue
--最终sql
select cardtype,cardvalue,cnt,mincardno,maxcardno from (
select type,cardtype,cardvalue,COUNT(*) as cnt,MIN(cardno) as mincardno,MAX(cardno) as maxcardno
from (
select convert(bigint,t.cardno)-no as type,t.* from (
select ROW_NUMBER() over (order by t1.cardno) as no,t1.* from #card t1 ) t
) tt
group by type,cardtype,cardvalue
) ttt

结果

 

/* 结果
cardtype             cardvalue   cnt         mincardno            maxcardno
-------------------- ----------- ----------- -------------------- --------------------
电费卡                  50          4           00111111             00111114
电费卡                  50          4           00111119             00111122
移动卡                  50          4           10111110             10111113
电费卡                  100         3           0110111112           0110111114

(4 行受影响)
*/

清理sql

 

drop table #card