What is cardinality in Databases? - Stack Overflow
May 16, 2012 · Could somebody explain to me, with the help of examples, what is cardinality in databases?
cardinality究竟是什么？ - 知乎
就可以得到任何集合 \left ( a,b \right) 和R都有相同的cardinality。 所以不能单一的定义cardinality为count。 纯手打修改了几次稍微完善了一点 才发现原来知乎像latex一样可以直接写公式form 阅读全 …
What is the definition of cardinality in SQL - Stack Overflow
Aug 28, 2014 · High-cardinality - many tuples, low-cardinality - few tuples. While the Wikipedia article on Cardinality (SQL statements), defines it as follows: Cardinality refers to the uniqueness of data …
database - Multiplicity vs Cardinality - Stack Overflow
May 7, 2022 · When talking about data models and databases, the term Cardinality is often used to describe the number of allowed elements in a given set. UML often refers to the same property as …
database - What is the difference between Max Cardinality and Min ...
Feb 24, 2011 · I am having a hard time understanding what is the difference between the Max and Min cardinalities when trying to design a database.
relationship type,degree, cardinality, optionality terms confusion
Dec 2, 2014 · Cardinality is minimum and maximun number of entity occurrence associated with one occurrence of the related entity cardinality types as 1 to 1 , 1 to many , many to many. or min and …
How much cardinality can I have in my prometheus metrics?
Nov 18, 2024 · In my experience a prometheus server can easily handle in the order of 1000 servers sending 1000 metrics. That's about a million active time series. A prometheus server can get to 10 …
How does cardinality work in an ER diagram when considering the ...
Feb 24, 2019 · I will going to explain my question using the fragment of a problem in which there are two entities: 🔸 Airplane 🔸 Location And a relationship to link these entities: 🔸 Send Logic 1: An airplane send …
Meaning of "n:m" and "1:n" in database design - Stack Overflow
Aug 3, 2010 · In database design what do n:m and 1:n mean? Does it have anything to do with keys or relationships?
sql server - Unable to fix "may affect ... - Stack Overflow
Jan 25, 2023 · Hi My task for a project is to remove this warning "Type conversion in expression (CONVERT (varchar (10), [Expr1017],0)) may affect "CardinalityEstimate" in query plan choice". I'v...