Getting results between two dates in PostgreSQL
SELECT * FROM mytable WHERE (start_date, end_date) OVERLAPS (‘2012-01-01’::DATE, ‘2012-04-12’::DATE); Datetime functions is the relevant section in the docs.
overlap
Overlapping/overlaying multiple inline images
You can use flex and reverse order then no need z-index: .avatars { display: inline-flex; flex-direction: row-reverse; } .avatar { position: relative; border: 4px solid #fff; border-radius: 50%; overflow: hidden; width: 100px; } .avatar:not(:last-child) { margin-left: -60px; } .avatar img { width: 100%; display: block; } <div class=”avatars”> <span class=”avatar”> <img src=”https://picsum.photos/70″> </span> <span class=”avatar”> … Read more
How would you make two s overlap?
Just use negative margins, in the second div say: <div style=”margin-top: -25px;”> And make sure to set the z-index property to get the layering you want.
Checking a table for time overlap?
This is a query pattern for which I found the answer many years ago: SELECT * FROM mytable a JOIN mytable b on a.starttime <= b.endtime and a.endtime >= b.starttime and a.name != b.name; — ideally, this would compare a “key” column, eg id To find “any overlap”, you compare the opposite ends of the … Read more
Collapse rows with overlapping ranges
You can try this: library(dplyr) ranges %>% arrange(start) %>% group_by(g = cumsum(cummax(lag(stop, default = first(stop))) < start)) %>% summarise(start = first(start), stop = max(stop)) # A tibble: 2 × 3 # g start stop # <int> <dbl> <dbl> #1 0 65.72000 87.75625 #2 1 89.61625 104.94062
Find overlapping date ranges in PostgreSQL
The currently accepted answer does not answer the question. And it is wrong in principle. a BETWEEN x AND y translates to: a >= x AND a <= y Including the upper bound, while people typically need to exclude it: a >= x AND a < y With dates you can easily adjust. For the … Read more
Is it a bad practice to use negative margins in Android?
In 2010, @RomainGuy (core Android engineer) stated that negative margins had unspecified behavior. In 2011, @RomainGuy stated that you can use negative margins on LinearLayout and RelativeLayout. In 2016, @RomainGuy stated that they have never been officially supported and won’t be supported by ConstraintLayout. It is easy to work around this limitation though. Add a … Read more
Why the content is not covered by the background of an overlapping element?
WARNING: Reading the following information can affect your mental health. The painting order for the descendants of an element generating a stacking context (see the z-index property) is: If the element is a root element: background color of element over the entire canvas. background image of element, over the entire canvas, anchored at the origin … Read more