sql Select 开始时间和结束时间组合内的最大值
sql Select the max value within a combination of starting time and ending time
我有一个数据库作为下面的数据table。它是一个标准的 Open High Low Close 数据库。我想要 select 日期、开始时间、结束时间、max([high] over ***The period of time) 和 Close
数据Table
date
time
high
20100104
94000
21850
20100104
94500
21903
20100104
95000
21875
20100104
95500
21855
20100104
100000
21904
20100104
100500
21922
20100104
101000
21935
20100104
101500
21949
20100104
102000
21954
20100104
102500
21987
20100104
103000
22017
20100104
103500
22049
20100104
104000
22024
20100104
104500
22015
20100104
105000
21988
20100104
105500
21996
20100104
110000
21966
20100104
110500
21989
20100104
111000
21983
20100104
111500
21942
20100104
112000
21937
20100104
112500
21925
20100104
113000
21927
20100104
113500
21956
20100104
114000
21950
20100104
114500
21904
20100104
115000
21898
20100104
115500
21896
20100104
120000
21915
20100104
120500
21900
20100104
121000
21850
20100104
121500
21845
20100104
122000
21856
20100104
122500
22000
20100104
142500
21855
20100104
143000
21900
20100104
143500
21839
20100104
144000
21758
20100104
144500
21751
20100104
145000
21763
20100104
145500
21786
20100104
150000
21804
20100104
150500
21794
20100104
151000
21803
20100104
151500
21814
20100104
152000
21850
20100104
152500
21835
20100104
153000
21853
20100104
153500
21874
20100104
154000
21900
20100104
154500
21842
20100104
155000
21833
20100104
155500
21819
20100104
160000
21861
20100104
160500
22000
20100104
161000
22000
20100105
94000
22079
20100105
94500
22095
20100105
95000
22095
20100105
95500
22098
20100105
100000
22109
20100105
100500
22089
20100105
101000
22061
20100105
101500
22033
20100105
102000
22045
20100105
102500
22103
20100105
103000
22071
20100105
103500
22092
20100105
104000
22093
20100105
104500
22184
结果
date
start-time
end-time
high among the period
20100104
94000
94000
21850
20100104
94000
94500
21903
20100104
94000
95000
21903
20100104
94000
95500
21903
20100104
94000
100000
21904
20100104
94000
100500
21922
20100104
94000
101000
21935
20100104
94000
101500
21949
20100104
94000
102000
21954
…
…
…
…
…
…
…
…
20100104
94500
94500
21903
20100104
94500
95000
21903
20100104
94500
95500
21903
20100104
94500
100000
21904
20100104
94500
100500
21922
20100104
94500
101000
21935
20100104
94500
101500
21949
20100104
94500
102000
21954
…
…
…
…
…
…
…
…
20100105
94000
94000
22079
20100105
94000
94500
22095
20100105
94000
95000
22095
20100105
94000
95500
22098
20100105
94000
100000
22109
20100105
94000
100500
22109
20100105
94000
101000
22109
20100105
94000
101500
22109
20100105
94000
102000
22109
…
…
…
…
…
…
…
…
20100105
94500
94500
22095
20100105
94500
95000
22095
20100105
94500
95500
22098
20100105
94500
100000
22109
20100105
94500
100500
22109
20100105
94500
101000
22109
20100105
94500
101500
22109
20100105
94500
102000
22109
…
…
…
…
…
…
…
…
…
…
…
…
…
…
…
…
这个应该怎么写？
自行加入 table 以获取所有开始和结束时间。然后 select 子查询中 select 子句中的最大高点。
select
s.date, s.time as start_time, e.time as end_time,
(
select max(high)
from mytable t
where t.date = s.date
and t.time between s.time and e.time
) as max_high
from mytable s
join mytable e on e.date = s.date and e.time >= s.time
order by s.date, s.time, e.time;
我有一个数据库作为下面的数据table。它是一个标准的 Open High Low Close 数据库。我想要 select 日期、开始时间、结束时间、max([high] over ***The period of time) 和 Close
数据Table
| date | time | high |
|---|---|---|
| 20100104 | 94000 | 21850 |
| 20100104 | 94500 | 21903 |
| 20100104 | 95000 | 21875 |
| 20100104 | 95500 | 21855 |
| 20100104 | 100000 | 21904 |
| 20100104 | 100500 | 21922 |
| 20100104 | 101000 | 21935 |
| 20100104 | 101500 | 21949 |
| 20100104 | 102000 | 21954 |
| 20100104 | 102500 | 21987 |
| 20100104 | 103000 | 22017 |
| 20100104 | 103500 | 22049 |
| 20100104 | 104000 | 22024 |
| 20100104 | 104500 | 22015 |
| 20100104 | 105000 | 21988 |
| 20100104 | 105500 | 21996 |
| 20100104 | 110000 | 21966 |
| 20100104 | 110500 | 21989 |
| 20100104 | 111000 | 21983 |
| 20100104 | 111500 | 21942 |
| 20100104 | 112000 | 21937 |
| 20100104 | 112500 | 21925 |
| 20100104 | 113000 | 21927 |
| 20100104 | 113500 | 21956 |
| 20100104 | 114000 | 21950 |
| 20100104 | 114500 | 21904 |
| 20100104 | 115000 | 21898 |
| 20100104 | 115500 | 21896 |
| 20100104 | 120000 | 21915 |
| 20100104 | 120500 | 21900 |
| 20100104 | 121000 | 21850 |
| 20100104 | 121500 | 21845 |
| 20100104 | 122000 | 21856 |
| 20100104 | 122500 | 22000 |
| 20100104 | 142500 | 21855 |
| 20100104 | 143000 | 21900 |
| 20100104 | 143500 | 21839 |
| 20100104 | 144000 | 21758 |
| 20100104 | 144500 | 21751 |
| 20100104 | 145000 | 21763 |
| 20100104 | 145500 | 21786 |
| 20100104 | 150000 | 21804 |
| 20100104 | 150500 | 21794 |
| 20100104 | 151000 | 21803 |
| 20100104 | 151500 | 21814 |
| 20100104 | 152000 | 21850 |
| 20100104 | 152500 | 21835 |
| 20100104 | 153000 | 21853 |
| 20100104 | 153500 | 21874 |
| 20100104 | 154000 | 21900 |
| 20100104 | 154500 | 21842 |
| 20100104 | 155000 | 21833 |
| 20100104 | 155500 | 21819 |
| 20100104 | 160000 | 21861 |
| 20100104 | 160500 | 22000 |
| 20100104 | 161000 | 22000 |
| 20100105 | 94000 | 22079 |
| 20100105 | 94500 | 22095 |
| 20100105 | 95000 | 22095 |
| 20100105 | 95500 | 22098 |
| 20100105 | 100000 | 22109 |
| 20100105 | 100500 | 22089 |
| 20100105 | 101000 | 22061 |
| 20100105 | 101500 | 22033 |
| 20100105 | 102000 | 22045 |
| 20100105 | 102500 | 22103 |
| 20100105 | 103000 | 22071 |
| 20100105 | 103500 | 22092 |
| 20100105 | 104000 | 22093 |
| 20100105 | 104500 | 22184 |
结果
| date | start-time | end-time | high among the period |
|---|---|---|---|
| 20100104 | 94000 | 94000 | 21850 |
| 20100104 | 94000 | 94500 | 21903 |
| 20100104 | 94000 | 95000 | 21903 |
| 20100104 | 94000 | 95500 | 21903 |
| 20100104 | 94000 | 100000 | 21904 |
| 20100104 | 94000 | 100500 | 21922 |
| 20100104 | 94000 | 101000 | 21935 |
| 20100104 | 94000 | 101500 | 21949 |
| 20100104 | 94000 | 102000 | 21954 |
| … | … | … | … |
| … | … | … | … |
| 20100104 | 94500 | 94500 | 21903 |
| 20100104 | 94500 | 95000 | 21903 |
| 20100104 | 94500 | 95500 | 21903 |
| 20100104 | 94500 | 100000 | 21904 |
| 20100104 | 94500 | 100500 | 21922 |
| 20100104 | 94500 | 101000 | 21935 |
| 20100104 | 94500 | 101500 | 21949 |
| 20100104 | 94500 | 102000 | 21954 |
| … | … | … | … |
| … | … | … | … |
| 20100105 | 94000 | 94000 | 22079 |
| 20100105 | 94000 | 94500 | 22095 |
| 20100105 | 94000 | 95000 | 22095 |
| 20100105 | 94000 | 95500 | 22098 |
| 20100105 | 94000 | 100000 | 22109 |
| 20100105 | 94000 | 100500 | 22109 |
| 20100105 | 94000 | 101000 | 22109 |
| 20100105 | 94000 | 101500 | 22109 |
| 20100105 | 94000 | 102000 | 22109 |
| … | … | … | … |
| … | … | … | … |
| 20100105 | 94500 | 94500 | 22095 |
| 20100105 | 94500 | 95000 | 22095 |
| 20100105 | 94500 | 95500 | 22098 |
| 20100105 | 94500 | 100000 | 22109 |
| 20100105 | 94500 | 100500 | 22109 |
| 20100105 | 94500 | 101000 | 22109 |
| 20100105 | 94500 | 101500 | 22109 |
| 20100105 | 94500 | 102000 | 22109 |
| … | … | … | … |
| … | … | … | … |
| … | … | … | … |
| … | … | … | … |
这个应该怎么写？
自行加入 table 以获取所有开始和结束时间。然后 select 子查询中 select 子句中的最大高点。
select
s.date, s.time as start_time, e.time as end_time,
(
select max(high)
from mytable t
where t.date = s.date
and t.time between s.time and e.time
) as max_high
from mytable s
join mytable e on e.date = s.date and e.time >= s.time
order by s.date, s.time, e.time;