SQL Server Cursor with Billy Thomas from ALLJOY data

Web Reference: Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind..Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind..[Order Details] od WHERE p. SQL是一种用于处理数据的语言，就像我们说的汉语、英语一样，有特定的语法结构，让我们灵活地处理数据。 SQL并不难学，首先得理解 S Q L 三个字母分别代表什么。 Structured Query Language，简写为SQL，意思是结构化查询语言。也就是说SQL是用来查询数据用的，通过代码指令来实现个性化的数据抽取 ... 了解SQL的大致情况后，我们再来看看如何学？ SQL是所有数据库查询的语言，sql由于本身结构化的特点，非常容易入手。 针对不同的数据库，如hivesql、mysql、sqlserver、oracle等，sql语法会有所不同，但是总体上大同小异，只是细微处的差别。

YouTube Excerpt: As a data analyst, there will be times that you can't get the job done with a SELECT statement; sometimes you will need to use a CURSOR. In this video, I will walk you through a real-world example of why you need a cursor and then I will walk you through an example in SQL Server using SSMS. Cursor Example Link: https://github.com/billythomasalljoydata/yt_examples/tree/915e886cc2db62d2226ee9bd8747c816b7557765/cursor

As a data analyst, there will be times that you can't get the job done with a SELECT statement; sometimes you will need to use a CURSOR. In this...

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