employee (person_name, street, city) works (person_nате, соmpanyлaте, salary) cоmpany (compaпy лате, сity) тапages (personлате, тапаgerлате) Figure 8.8 Relational database for Exercise 8.6.

employee (person_name, street, city) works (person_nате, соmpanyлaте, salary) cоmpany (compaпy лате, сity) тапages (personлате, тапаgerлате) Figure 8.8 Relational database for Exercise 8.6.

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter3: Data Representation

Section: Chapter Questions

Problem 3RP

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Concept explainers

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.

Question

Consider the relational schema shown in Figure 8.8. Write each of the following queries on the schema, using SQL.
i. Find the company with the most employees. ii. Find the company with the smallest payroll.
iii. Find those companies whose employees earn a higher salary, on average, than the average salary at First Bank Corporation.

employee (person_name, street, city)
works (person_nате, соmpanyлaте, salary)
cоmpany (compaпy лате, сity)
тапages (personлате, тапаgerлате)
Figure 8.8 Relational database for Exercise 8.6.

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