Question

Based on the tables EMP and DEPT, do the following transaction and queries?

a. For all problems, you must image the data set is huge so that you cannot see an entire table. For example, if give emp name BLAKE, you cannot assume that you know his EMPNO = 7698?
b. Each query or transaction must be done by one SQL statement?

Answer 1

SQL queries are essential for managing large datasets in databases, with each query typically executed in a single statement for efficiency.

Step-by-step explanation:

To address the question involving SQL statements for the EMP and DEPT tables, it's essential to use the SQL language to manage and query large datasets effectively. These tables represent employee and department data, respectively, which are common in database management coursework.

Addressing the transaction and query requests requires constructing precise SQL queries. For instance, given an employee name such as BLAKE, to find the associated EMPNO without knowing it in advance, one would execute a query like SELECT EMPNO FROM EMP WHERE ENAME = 'BLAKE';.

Each query must be completed in a single SQL statement to ensure efficiency and accuracy when dealing with large amounts of data. Whether the question is about finding a percentage of data, comparing survey results, or interpreting data distributions, the principle remains the same: use SQL to extract and analyze the required information effectively.