Get a shorter way to go (Al)

These two days have been plagued by a function implementation method. At first, the idea was very simple. It was a big deal to achieve a two-loop solution, but the performance was indeed a problem, although there are not many iterations in each loop, a database is required in one iteration. In the case of 6 out of 5, 30 times is required. We can imagine the database overhead. however, when I got off work today, I suddenly found that this complicated problem could be solved through the construction of the view, although the pressure on the Database End was reached, however, this solution is more efficient than multiple operations on database objects, andCodeYou don't have to write that much.