Introduction - If you have any usage issues, please Google them yourself
Take any sequence of records to be sorted in a record (for example, take the first record) as a reference (pivot), in accordance with the size of the record key, the whole record sequence is divided into two sub-sequences about: the left sub-sequences all keyword record less than or equal to the reference sequence record key on the right side of all the records of the keywords are greater than the reference record of keyword