Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Post an Article
Welcome To Ask or Share your Answers For Others

Categories

订单表如何设计

0 votes
252 views
in Technique[技术] by (71.8m points)

订单表如何设计

订单有数量，单价，总价
我想问一下总价计算后要不要存库。啥时计算


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

这类字段一般最好存库，因为单价有可能是会调整的 如果单价发生变化了，总价也会变，这样订单表就比较明了。并且做查询的时候可以直接查总价字段了，不用任何表达式。
在保存当前订单时 计算总价 并一起保存库中


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界，一个免费开放的程序员编程交流平台！开放，进步，分享！让技术改变生活，让极客改变未来！ Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

Just Browsing Browsing

1.4m articles

1.4m replys

5 comments

57.0k users

Most popular tags

Snow Theme by Q2A Market
Powered by Question2Answer
...