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Write each of the following queries in SQL. 1. Find the colors of boats reserved by Albert. SELECT color FROM s, b, r WHERE r.sid=s.sid AND r.bid=b.bid AND sname=`Albert’ . 2. Find all sailor id’s of sailors who have a rating of at least 8 or reserved boat 103.
This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for those with less experience in SQL.
SQL Handwritten Notes Repository: A collection of PDF notes covering SQL concepts with concise definitions and examples. Explore fundamental commands, date/time functions, joins, and more. Contributions welcome! Happy studying and coding!
22 paź 2024 · SQL Exercises for Practice. Practice SQL questions to enhance our skills in database querying and manipulation. Each question covers a different aspect of SQL, providing a comprehensive learning experience. We have covered a wide range of topics in the sections beginner, intermediate and advanced.
SQL Practice Questions - Solution 1. For the following relation schema: employee(employee-name, street, city) works(employee-name, company-name, salary) company(company-name, city) manages(employee-name, manager-name) Give an expression in SQL for each of the following queries:
MOST IMPORTANT QUERIES (90% ASKED IN INTERVIEWS) 1.Query to find Second Highest Salary of Employee?(click for explaination) Answer:-Select distinct Salary from Employee e1 where 2=Select count(distinct Salary) from Employee e2 where e1.salary<=e2.salary; 2.Query to find duplicate rows in table?(click here for explaination) Answer :-
background of the SQL language, moving through the basics, and then progressing into some of the more advanced features that will allow you to really shine. Additionally, this book ends with a chapter showing how to query data in nonrelational databases, which is a topic rarely covered in introductory books. Structure of This Book
