ARRAY_POSITIONS function returns the positions of all occurrences of an array element. Here is the basic syntax of using the ARRAY_POSITIONS function.
SELECT ARRAY_POSITIONS(array[2,1,3,1,2],1);
Above sql returns 2,4 as the output as element ‘1’ occurred in both 2nd and 4th position.
The array_append function in PostgreSQL is used to append an element to the end of an array. It takes two arguments: the array to which you want to append an element, and the element you want to append. Below is the syntax of the array_append function: array_append(array, element_to_append) Where: array is the array to which…
The array_replace function in PostgreSQL is used to replace all occurrences of a specified value from an array. It takes three arguments: the array from which you want to replace elements, the value that you want to replace and the value you want to replace with. Below is the syntax of the array_replace function: array_replace(array,…
The unnest function in PostgreSQL is used to transform an array or a set of values into a set of rows. This is particularly useful when you have a column that stores arrays or sets and you want to work with the individual elements within those arrays as separate rows. Below is the basic syntax…
The cardinality function in PostgreSQL is used to determine the number of elements in an array. It returns an integer value representing the size or length of the array. The cardinality function is particularly useful when you need to find out how many elements are in an array so that you can perform various calculations…
The array_to_string function is used to convert an array of elements into a single string in PostgreSQL database by concatenating the elements together with a specified delimiter. Here is the syntax for the array_to_string function: array_to_string(array_expression, delimiter) where array_expression is the array that you want to convert into a string. and delimiter is the delimiter…
The array_remove function in PostgreSQL is used to remove all occurrences of a specified value from an array. It takes two arguments: the array from which you want to remove elements and the value you want to remove. Below is the syntax of the array_remove function: array_remove(array, value_to_remove) Where: array is the array from which…