Recent questions and answers in Oracle

Recent questions and answers in Oracle

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You want to create a list of managers and the number of employees reporting to them

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Consider a scenario where the company plans to give a salary raise to employees

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Imagine you want to identify employees who are eligible for promotions based on their years

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Say you’re preparing a report for the management to identify employees who have shown consistently high performance.

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Imagine you’re an HR manager and want to get an overview of the average performance rating for each department

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Case Study: Sales Analysis System. The dataset contains information about sales transactions in a company.

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Imagine you have an Inventory table with product_id and quantity columns

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In a database containing information about books and authors

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Imagine that you have a students table with the columns student_id, student_name

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You have an Employees table with columns for employee names and their respective managers

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Write an Oracle SQL query to ensure only users with the manager role can insert rows into the performance_reviews table.

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Write an Oracle SQL query to find the five most common names in the Employee table.

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Write an Oracle SQL query to find the names of employees not assigned to any project.

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Calculate the percentage of total sales each product contributes to the overall revenue.

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Calculate the total revenue generated by each customer in the last three months.

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Retrieve the top five highest-rated products based on customer

answered Jan 21, 2024 in Oracle by

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Write an Oracle SQL query to get the date and time of the last 10 logins for a specific user.

answered Jan 21, 2024 in Oracle by

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How would you update the status column of the orders table to set all orders

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Write an Oracle SQL query to find employees who earn more than their managers.

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Write an Oracle SQL query to find the average salary of employees within each department.

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How would you explain database roles and privileges in Oracle SQL security?

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How will you differentiate between Varchar & Varchar2?

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What are some advantages of using bind variables in Oracle SQL?

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What do the COMMIT and ROLLBACK statements in Oracle SQL do?

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What is the key difference between ROW-level and STATEMENT-level triggers in Oracle?

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How does the Oracle Query Optimizer determine an execution plan for a query?

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Differentiate between the WHERE clause and the HAVING clause in Oracle SQL.

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Name one advantage of using indexes in a database.

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What is the purpose of the UNION operator in Oracle SQL?

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Explain the difference between RANK and DENSE_RANK functions in Oracle SQL.

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