Optimize the following SQL Query by using Query Tree and Heuristic Rules: SELECT C.Fname, E.Fname FROM Employee AS E, Customer AS C, Order AS O WHERE E.EMP_ID=O.E_ID AND C.City=’Jeddah’ AND C.Customer_ID=O.C_ID AND E.EMP_ID=’12943’   You should show the Initial Query Tree and add a screenshot of the Query Tree after applying each rule

Q: You have to write a soQL Query on Opportunity oject in which we have to find out the Sum of amount…

A: Introduction: Salesforce Object Query Language (SOQL) to search your Salesforce data for specific…

Q: A)  Write a query which shows the employee IDs that are unique to the employee table. Order the…

A: Solution A) -  In the first part, we need to write a query to employee Ids and the employee should…

Q: Mongodb query to find the most common name in each state. "root":{ "user_id":"XdI7w" "name":…

A: Solution for the above question is solved in step 2:-

Q: syntax to

A: Gender equality is when people of all genders have liberty, fair treatment, responsibilities and…

Q: Write and execute a SQL query to list all patient numbers and encounter ids which do not have any…

A: Actually, SQL stands for Structured Query Language.

Single Table

In a database management system, a single table is designed to obtain data of heterogeneous items. A single-table design with DynamoDB resolves the issue of raising multiple requests for the relevant data of an entity.