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_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_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 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 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_length function is used to determine the length (number of elements) of a one-dimensional array in PostgreSQL. This function takes two arguments – the array and the dimension for which you want to find the length. Here’s the syntax of the array_length function: array_length(array_expression, dimension) Where: array_expression is the array for which you want…
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…