SQL Tutorial #13 - SQL EXISTS and NOT EXISTS Operator

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: Get all my courses for USD 5.99/Month - https://bit.ly/all-courses-subscription In this SQL Tutorial, we will learn about SQL Exists and Not Exists Operators. EXISTS operator is used to test the existence of any record on SUBQUERY, if the SUBQUERY returns TRUE then the main query is evaluated. 👉 FULL PLAYLIST - SQL Tutorial: https://bit.ly/Sql-Tutorial 👉 More Training's at: https://training.rcvacademy.com 🌟 Please hit LIKE ❤️, SHARE, and SUBSCRIBE for more AMAZING courses: 🔔 SUBSCRIBE to CHANNEL | Click the link to Subscribe: https://bit.ly/2YGU6JM 🌟 TEST AUTOMATION COURSES 🌟 👉 Selenium with Java: https://bit.ly/selenium-webdriver-tutorial-with-java 👉 Selenium with Python: https://bit.ly/SeleniumPythonTutorial 👉 Robot Framework Automation: https://bit.ly/robot-framework-tutorial 👉 TestNG Tutorial: https://bit.ly/testng-tutorial 👉 PyTest Tutorial: https://bit.ly/PyTest-Tutorial 👉 Jenkins Tutorial: https://bit.ly/jenkins-tutorials 👉 Git and GitHub Tutorial: https://bit.ly/git-and-github-tutorial 👉 Python Logging Tutorial: https://bit.ly/python-logging-tutorial 👉 Selenium XPATH Tutorial: https://bit.ly/selenium-xpath-tutorial 👉 CSS Selectors Tutorial: https://bit.ly/css-selectors-tutorial 👉 JSONPath Tutorial: http://bit.ly/2sIZIFG 👉 Python Behave Tutorial: http://bit.ly/python-behave-tutorial 👉 Cucumber Selenium Tutorial: http://bit.ly/cucumber-selenium-tutorial 🌟 MANUAL TESTING AND ISTQB COURSES 🌟 👉 Manual Testing Full Course: https://bit.ly/SoftwareTestingTutorial 👉 ISTQB Agile Tester Course: http://bit.ly/istqb-agile-tester-certification 👉 ISTQB Foundation Level Course: http://bit.ly/istqb-foundation-level-training 🌟 SOFTWARE TESTING MOCK INTERVIEWS 🌟 👉 https://bit.ly/software-testing-mock-interviews 🌟 SOFTWARE TESTING INTERVIEW QUESTIONS AND ANSWERS 🌟 👉 https://bit.ly/software-testing-interview-questions-and-answers 🌟 RESUME AND CAREER TIPS 🌟 👉 Interview Prep Tips: https://bit.ly/interview-and-resume-tips 👉 Career Tips: https://bit.ly/software-testing-career-tips 🌟 API TESTING COURSES 🌟 👉 SoapUI Tutorial: http://bit.ly/Sopui-tutorial 👉 Postman Tutorial: http://bit.ly/2PBbhI7 👉 Katalon API Testing: https://bit.ly/Katalon-API-Testing-Tutorial 🌟 PROGRAMMING COURSES 🌟 👉 Java for Testers: http://bit.ly/2F1iL1B 👉 Python for testers: https://bit.ly/python-for-testers 👉 Python Basics: http://bit.ly/python-programming-tutorials 🌟 TEST MANAGEMENT TOOLS 🌟 👉 TestLink Tutorial: https://bit.ly/TestLink-Tutorial 👉 TestRail Tutorial: http://bit.ly/testrail-tutorial 👉 PractiTest Tutorial: http://bit.ly/practitest-tutorial 👉 TestLodge Tutorial: https://bit.ly/testlodge-tutorial 🌟 AGILE TESTING TOOLS 🌟 👉 Zephyr for Jira: http://bit.ly/zephyr-for-jira-tutorials 👉 Zephyr for Jira: https://bit.ly/learn-zephyr-for-jira 🌟 ATLASSIAN JIRA COURSES 🌟 👉 Jira Beginner Tutorial: http://bit.ly/jira-beginner-tutorial 👉 Jira Workflow Tutorial: http://bit.ly/2EzKOEB 👉 Jira Cloud Tutorial: https://bit.ly/Jira-Cloud-Tutorial-for-Software-Teams 👉 Jira Administration Tutorial: http://bit.ly/36MPPFR 👉 Jira Intermediate Tutorial: http://bit.ly/Atlassian-JIRA-tutorials 👉 Jira Essentials Training: http://bit.ly/jira-tutorials 🌟 AGILE PROJECT MANAGEMENT COURSES 🌟 👉 Confluence Tutorial: https://bit.ly/Confluence-Tutorial 👉 Jira Work Management: https://bit.ly/jira-work-management 👉 Jira Roadmap Tutorial: https://bit.ly/jira-roadmaps-tutorial 🌟 AGILE BASICS COURSE 🌟 👉 Agile Tutorials: http://bit.ly/agile-tutorials 👉 All Playlists of SoftwareTestingMentor Channel: https://www.youtube.com/SoftwareTestingMentor 👉 All Playlists of RCV Academy Channel: https://www.youtube.com/channel/UCddUDR_BxsWJRwPinmBcZ8g 🌟 FOLLOW US ON TWITTER 🌟 https://twitter.com/rcvacademy https://twitter.com/swtmentor https://twitter.com/mrmverma 🌟 LIKE US ON FACEBOOK 🌟 https://www.facebook.com/softwaretestingmentor https://www.facebook.com/rcvacademy47/ 🌟 OUR TUTORIAL WEBSITES 🌟 https://www.softwaretestingmentor.com https://www.rcvacademy.com 🌟 GET MY TRAININGS ON UDEMY 🌟 https://www.udemy.com/user/manish68/ ✨ Tags ✨ sql exists and not exists operator,sql exists,sql not exists,where exists and not exists in sql?,not exists,sql tutorial,exists and not exists in sql,sql tutorial for beginners,what is if not exists in sql?,sql tutorial advanced,software testing mentor sql,sql course,sql tutorial youtube,exists operator in sql,not exists operator in sql ✨ Hashtags ✨ #SqlTutorial #SQL #SqlCourse #SqlBaiscs #MySQL #MySQLTutorial #LearnSql #RcvAcademy #SoftwareTestingMentor 🌟 Join this channel to support my work 🌟 https://www.youtube.com/channel/UCzOMBStlSDfyai6rWdK3hWw/join

Get all my courses for USD 5.99/Month - https://bit.ly/all-courses-subscription In this SQL Tutorial, we will learn about SQL Exists and Not Exists...

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