nr. 960 - Daily League Sudoku - In order Sudoku

I found this sudoku variation somewhere, unfortunately I don't remember the exact place now.

Rules for In order Sudoku:

Standard Sudoku rules apply. There are clues around the grid. These mean the order of 28 3-digit numbers that can create if we read the first 3 digit from the side of the grid. 1 sign the smallest number, and 28 the largers. (All numbers are different.)

For instance if the filled row is 123456789 then the number from the left side is 123 and the number from the right side is 987.