资讯
A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...
It is important to take time to design any queries that may need to be implemented later. Query design does not need to include specific SQL (Structured Query Language) commands. SQL will only be used ...
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