PostgreSQL – ARRAY_POSITION Function

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_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…

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 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 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…