The Mysql2 gem is meant to serve the extremely common use-case of connecting, querying and iterating on results. Some database libraries out there serve as direct 1:1 mappings of the already complex C ...
--windows functions are really powerful and are somewhat like a group by - except they don't roll everything up into 1 row when grouping. --windows functions allow us to look at a partition or a group ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果