ARRAY_POSITION function in PostgreSQL is used to return the position of the first occurrence of an array element. Here is the basic syntax of using array_position function. SELECT array_position(your_array_column, int)) AS position FROM your_table ; Example of using array_position function: SELECT array_position(array(20, 10, 10, 30), 10) AS position; The output would be 2 ; as…

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 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…