The array_fill function in PostgreSQL is used to create an array of a specified dimension and fill it with a specified value. This function is useful when you want to generate arrays with a specific structure and initialize all elements to a common value. Below is the syntax for the array_fill function: array_fill(value, dimensions) value…

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 string_to_array function is used to split a string into an array of substrings based on a specified delimiter. It takes a string as input and returns an array of text elements as output. Below is the syntax for the string_to_array function: string_to_array(input_string, delimiter) where input_string is the string that you want to split into…

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_prepend function is used to prepend an element to the beginning of an array. It takes two arguments: the element you want to prepend, and the array to which you want to prepend the element. Below is the syntax of the array_prepend function: array_prepend(element, array) Where: element is the element you want to prepend…

The array_cat function is used to concatenate two arrays together in PostgreSQL database. It takes two array arguments and returns a new array that contains all the elements from both input arrays. The order of elements in the resulting array is determined by the order in which the input arrays are passed. Below is the…

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 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…

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.