This repository contains study notes and the best practices of SQL or SQL like language
The code should run in the relational database or big data environment. Each fold contains the details of the environment. For example, impala fold means all scripts within should run in the impala environment. The file name of query follows env-function.filetype. For example, impala-window-aggregation.hql. The results of the query file follows: env-function.md with the same file name as the query.