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Check if date colum is in some period which depends on another date column

By : saman.m
Date : October 14 2020, 02:15 PM
Hope this helps You can calculate start and end of the date range with help INTERVAL statement. For example:
code :
  t1.installend - INTERVAL 5 DAY, /*start date*/
  t1.installend + INTERVAL 5 DAY  /*end date*/
FROM <your table name>
t1.insend BETWEEN t1.installend - INTERVAL 5 DAY AND t1.installend + INTERVAL 5 DAY

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How to check in TSQL if grouped column contains value and depends of result create colum with value true or false

By : user3073619
Date : March 29 2020, 07:55 AM
I hope this helps you . I have 3 tables. Check screenshots. , You need to use Conditional Aggregate
code :
SELECT i.id,
       Count(CASE WHEN ui.userid = @userid THEN 1 END)
FROM   Inquiry I
       LEFT JOIN UserInquiry ui
              ON ui.userid = i.id
GROUP  BY i.id,i.title 

Check if date/period is inside another date(s)/period - is more elegant solution possible?

By : Krishan
Date : March 29 2020, 07:55 AM
will help you You usually can use functions to shorten the code. However i'd think a class is more suitable for this:
code :
class DateRange{
  public $from, $to;

  public function inBetween($outer){
    return $this->from >= $outer->from && $this->to <= $outer->to;

  function __construct($from, $to){
    if($a = $from->getTimestamp() == $b = $to->getTimestamp()){
      throw new \Exception('A period cannot be the same time');
    } else {
      if($a < $b){
        $this->from = $a;
        $this->to = $b;
      } else {
        $this->from = b;
        $this->to = $a;

$today    = new Datetime();
$lastyear = (new Datetime())->modify('-1 year');
$from     = (new Datetime())->modify('-9 month');

$outer    = new DateRange($lastyear, $today);
$inner    = new DateRange($from, $today);

  echo 'it is';
} else {
  echo 'it isnt';

Check if current date is between date period interval and export the result for each date on separate excel sheet

By : Alkaid.Starworld
Date : March 29 2020, 07:55 AM
Any of those help I have a date frame (four variables) with two date columns, start_holiday and end_holiday.I am trying to check if a specific dates within the holiday date range and if it is then export the outcome for that specific date as a one excel sheet. , Here you will receive one .xlsx file with sheet for each date:
code :

df <- 
  df %>%
  mutate_at(3:4, ymd)

dates <-
    df$Start.Holiday %>% min(),
    df$End.Holiday %>% max(),
  ) %>%

wb <- createWorkbook()

for (d in dates) {
  temp <-
    df %>%
    filter(Start.Holiday <= ymd(d) & End.Holiday >= ymd(d))
    addWorksheet(wb, sheetName = d)
    writeData(wb, d, temp)

saveWorkbook(wb, 'holidays.xlsx')

How to check if a date period is embraced by another date period in python?

By : Dave Robison
Date : March 29 2020, 07:55 AM
Hope that helps What is the most pythonic way to check if a date period is embraced by another date period in python? , You can do that using a pip module:

How to check if one date period overlapping another date period

By : Tim
Date : October 10 2020, 10:00 AM
will be helpful for those in need The easiest way to understand this is two consider the 4 possibilities:
the second interval contains the first interval: s2 < s1 < e1 < e2 The second interval contains the start of the first interval: s2 < s1 < e2 < e1 The second interval contains the end of the first interval: s1 < s2 < e1 < e2 The second interval is contained in the first interval: s1 < s2 < e2 < e1
code :
        1.                  2.                    3.               4.

|---------------|       |-------|                |------|        |----|     Second Interval
     |-----|                 |------|        |-------|       |-----------|  First Interval
s2   s1    e1   e2      s2   s1 e2  e1      s1  s2   e1 e2   s1  s2  e2  e1
public boolean isDateOverlapping(LocalDate start1, LocalDate end1, LocalDate start2, LocalDate end2) {
    return start2.isBefore(end1) && end2.isAfter(start1); 
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