Build off of the Python scripting for the ETL-CRUD pipeline, additional complex SQL queries will be performed, consisting of joins, aggregation, and sorting, for a MySQL database.

随手写的一些txt文件，如果发现有价值会拷贝到其他目录. Contribute to coderBi/temp-txt development by creating an account on GitHub.

In MySQL, the same query thrashes really hard. After some experimentation, it seems like the subquery itself is the problem. For instance: ...