date-range

问题 I'm using PostgreSQL 9.4 I have column in a table named timerange and want to write a SELECT query which will return time range in two separate columns time_start and time_end . I tried to handle this like an array but it doesn't work: select *, timerange[0] as t_start from schedules; Current table: | id | timerange | |----|-----------------------------------------------------| | 1 | ["2017-05-05 19:00:00+02","2017-05-05 21:00:00+02") | | 2 | ["2017-05-05 19:00:00+02","2017-05-05 21:00:00+02"

问题 I'm using PostgreSQL 9.4 I have column in a table named timerange and want to write a SELECT query which will return time range in two separate columns time_start and time_end . I tried to handle this like an array but it doesn't work: select *, timerange[0] as t_start from schedules; Current table: | id | timerange | |----|-----------------------------------------------------| | 1 | ["2017-05-05 19:00:00+02","2017-05-05 21:00:00+02") | | 2 | ["2017-05-05 19:00:00+02","2017-05-05 21:00:00+02"

问题 I need to left join two tables with a where condition: time_table id rid start_date end_date 1 2 2017-07-01 00:00:00 2018-11-01 00:00:00 2 5 2017-01-01 00:00:00 2017-06-01 00:00:00 3 2 2018-07-01 00:00:00 2020-11-01 00:00:00 record_table id name date 1 record1 2017-10-01 00:00:00 2 record2 2017-02-01 00:00:00 3 record3 2017-10-01 00:00:00 I need to get all those records which are present under given date range. In the above example, I need those records that lie under range for rid = 2 only.

问题 In sheet 1, I have a list of dates in Column A in chronological order. There are values corresponding to this list in Column B. There is another list of dates in sheet 2 and I want to add values from sheet 1 to these dates. Sheet 1. **Column A Column B DATE Amount** 1. 10/01/2015 25,60,000 2. 10/02/2015 26,80,000 3. 01/03/2015 21,55,000 4. 30/03/2015 24,60,500 5. 30/04/2015 28,20,000 6. 30/06/2015 19,00,000 Sheet 2. Column A Column B 1. 21/02/2015 21,55,000 2. 15/01/2015 3. 20/05/2015 4. 25

问题 Set one: 2014-04-05 To 2014-06-27 2014-06-28 To 2014-10-19 Set two: 2014-04-05 To 2014-05-02 2014-05-03 To 2014-05-31 2014-06-01 To 2014-10-19 What I need this to output is: 2014-04-05 To 2014-05-02 2014-05-03 To 2014-05-31 2014-06-01 To 2014-06-27 2014-06-28 To 2014-10-19 I attempted to use a function to check for overlaps as such: !($lhs['RecordOnset'] > $rhs['RecordOffset'] || $lhs['RecordOffset'] < $rhs['RecordOnset']) And used a for loop to check for the overlap: for($i = 1; $i < sizeof(

问题 Background (Input) The Global Historical Climatology Network has flagged invalid or erroneous data in its collection of weather measurements. After removing these elements, there are swaths of data that no longer have contiguously dated sections. The data resembles: "2007-12-01";14 -- Start of December "2007-12-29";8 "2007-12-30";11 "2007-12-31";7 "2008-01-01";8 -- Start of January "2008-01-02";12 "2008-01-29";0 "2008-01-31";7 "2008-02-01";4 -- Start of February ... entire month is complete .

问题 I have Date() properties. startingAt and endingAt . And an array of Date(), which are alreadyRegistred . I have to create an array of strings with dates between startingAt and endingAt . StartingAt and endingAt are included and the last requirement is to exclude alreadyRegistred dates. Do you have some elegant idea, how to do it? Thanks for help! Edit: Maximum number of dates in final array will be about 7 days. 回答1: Dont forget that a Date is basically just a timestamp, and that you can have

问题 I have a simple table of date ranges each with an associated number of hours per week: CREATE TABLE tmp_ranges ( id SERIAL PRIMARY KEY, rng daterange, hrs_per_week INT ); And some values from which I would like to compute (ie aggregate) the sum of hours per week for the overlapping/intersecting date ranges: INSERT INTO tmp_ranges (rng, hrs_per_week) VALUES ('[2014-03-15, 2014-06-28]', 9), ('[2014-04-18, 2014-07-15]', 2), ('[2014-06-03, 2014-09-12]', 9), ('[2014-10-03, 2014-11-14]', 6);

问题 I am looking to build a date range picker that's values only consist of January-December of a single year at a time.It will look something like this: (This is taken from my existing kendo date range picker and poorly photoshopped) I have built one using the kendo date picker but it seems to require two calendars, one for start date and the other for end date. Being that my range can only span months in a single year, I just need one calendar like below where the user can either click and drag

问题 I am looking to build a date range picker that's values only consist of January-December of a single year at a time.It will look something like this: (This is taken from my existing kendo date range picker and poorly photoshopped) I have built one using the kendo date picker but it seems to require two calendars, one for start date and the other for end date. Being that my range can only span months in a single year, I just need one calendar like below where the user can either click and drag