Propose a mean of batchnig queries when a lot of results is needed

[GabrielRevelli]

Propose a mean of batchnig queries when a lot of results is needed by using parallel SQL queries.

[martinrech4806]

When a large number of results are required, the user must configure the number of threads he can authorize and the size at which the library must use Thread(). The goal of this problem is to create a function with a semaphore that manages threads with multiple SQL queries.