Обсуждение: [GENERAL] GENERAL - [How to check if the array contains the element.]

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[GENERAL] GENERAL - [How to check if the array contains the element.]

От
VENKTESH GUTTEDAR
Дата:
Hello All,

    How do i check if any one element of one array exists in another array.
    Eg:
        array1 = [1,2,3,4]
        array2 = [1,4,5,7]
    Now i expect the result as true even if any one element matches from array2 in array1.

    Any help would be appreciated.

    Thank you.

--
Regards :
Venktesh Guttedar.

Re: [GENERAL] GENERAL - [How to check if the array contains theelement.]

От
Andreas Kretschmer
Дата:

Am 26.04.2017 um 13:24 schrieb VENKTESH GUTTEDAR:
> Hello All,
>
>     How do i check if any one element of one array exists in another
> array.
>     Eg:
>         array1 = [1,2,3,4]
>         array2 = [1,4,5,7]
>     Now i expect the result as true even if any one element matches
> from array2 in array1.

You can use the overlap - operator:

test=*# select array[1,2,3,4] && array[1,4,5,7];
  ?column?
----------
  t
(1 Zeile)

test=*# select array[1,2,3,4] && array[10,40,50,70];
  ?column?
----------
  f
(1 Zeile)


Regards, Andreas

--
2ndQuadrant - The PostgreSQL Support Company.
www.2ndQuadrant.com

Re: [GENERAL] GENERAL - [How to check if the array contains the element.]

От
Pavel Stehule
Дата:
Hi

2017-04-26 13:33 GMT+02:00 Andreas Kretschmer <andreas@a-kretschmer.de>:


Am 26.04.2017 um 13:24 schrieb VENKTESH GUTTEDAR:
Hello All,

    How do i check if any one element of one array exists in another array.
    Eg:
        array1 = [1,2,3,4]
        array2 = [1,4,5,7]
    Now i expect the result as true even if any one element matches from array2 in array1.

 You can use the overlap - operator:

test=*# select array[1,2,3,4] && array[1,4,5,7];
 ?column?
----------
 t
(1 Zeile)

test=*# select array[1,2,3,4] && array[10,40,50,70];
 ?column?
----------
 f
(1 Zeile)


or subset

postgres=# select array[1,2,3,4] @> array[1,3,2,4];
┌──────────┐
│ ?column? │
╞══════════╡
│ t        │
└──────────┘
(1 row)



Regards, Andreas

--
2ndQuadrant - The PostgreSQL Support Company.
www.2ndQuadrant.com



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