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This blog covers the latest technologies in Microsoft .Net. In 2020, I will be talking about Uno Platform frequently. http://youtube.com/FutureOfDotNet kaki104

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What is LINQ
- Language Integrated Query
- 다른 소스 및 Type에서 데이터를 검색하고 활용하기 위한 표현식
- 컬렉션, Ado.NET, DataSet, XML Docs, 웹 서비스 및 MS SQL Server 및 기타 데이터베이스등 다양한 데이터 소스에서 검색 및 활용이 가능
- 101 LINQ samples

LINQ Basic


LINQ Basic Keywords
- from : 쿼리 표현식은 from으로 시작해야함
- in : 4가지 경우에 사용되며 일반적으로 from과 함께 사용
- let : 쿼리식에서 하위절의 결과를 저장하여 후속절에서 사용하는 것이 유용한 경우에 let 키워드를 사용하여 새로운 로컬 변수를 만들어서 다양하게 활용이 가능
- into : group, join or select 절의 결과를 저장하는 임시 식별자를 만들수 있음
- on : join 절에서 결합 조건을 지정하는데 사용
- equals : join 절에서 두 시쿼스의 요소를 비교하는데 사용

Restrictions 제한
- Where


https://youtu.be/ci2U1cG6TvI

 

LINQ part1.pdf
0.22MB

Posted by kaki104

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