Popular Data Set

Spring is here. While many brands are already enjoying the summer and warmer months, retail is experiencing some important trends. They don’t appear overnight: one trend sometimes triggers another or evolves naturally to gradually become something completely different. But their development always ...

The key to a successful Valentine 's Day evening is the experience and the unique offer that you will propose to your customers. They have probably had hundreds of tête-à-tête dinners, if not more. How can you ensure that this evening will be up to par and, above all, different from the others? Make ...

Customer behavior has changed, and Lightspeed is working to help our merchants adapt. In addition to launching Mobile Tap to make payments easier and eWallet to reduce online transaction errors, we’ve been hard at work on a new part of our Analytics suite that merchants can use to ensure they’re ...

There’s no denying that retail has changed. The rise of online shopping has redefined the way customers interact with businesses. To adapt to the way customers shop today, retailers must evolve as well. This article will show you how to adapt your store to serve today’s customers.

In addition to ...

5 emailing tips to implement to prepare for the start of the school year
A milestone in many children's lives is school, which symbolizes independence, change and a new stage in life. It is also an exciting time for parents, full of emotions and memories that come to the surface... Full of things to ...

实体关系 (ER) 图是一种流程图，用于说明系统中的“实体”（例如人、对象或概念）如何相互关联。ER 图最常用于设计或调试软件工程、商业信息系统、教育和研究领域的关系数据库。它们也称为 ERD 或 ER 模型，使用一组定义的符号（例如矩形、菱形、椭圆形和连接线）来描述实体、关系及其属性的相互关联。它们反映了语法结构，实体为名词，关系为动词。

实体关系图模板
ER图模板（点击图片可在线修改）
ER 图与数据结构图 (DSD) 相关，后者侧重于实体内元素的关系，而不是实体本身之间的关系。ER 图也经常与数据流图(DFD) 结合使用，后者绘制流程或系统的信息流。

数据流图模板
数据流图模板 ...