Oracle PL/SQL Online Test

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About the test

The Oracle PL/SQL online test assesses knowledge of PL/SQL with live coding tasks that require writing SQL queries and using features specific to the Oracle SQL Engine.

The assessment includes work-sample tasks such as:

  • Writing stored procedures and functions, handling exceptions, and using transactions.
  • Using procedural language features of Oracle PL/SQL to optimize and refine queries at the database layer.
  • Writing queries and subqueries that join, group, filter, and aggregate data.

A good database admin or back-end developer working with an Oracle SQL Server database needs to be able to use Oracle's PL/SQL to create custom procedures and objects to interface with the database efficiently.

Sample public questions

Easy
7 min
code
Public
SQL
Aggregation
Group by
Select

App usage data are kept in the following table:

TABLE sessions
  id INTEGER PRIMARY KEY,
  userId INTEGER NOT NULL,
  duration DECIMAL NOT NULL

Write a query that selects userId and average session duration for each user who has more than one session.

See the example case for more details.

Hard
3 min
mca
Public
Oracle PL/SQL
Transactions

Consider the following code:

CREATE OR REPLACE PROCEDURE log_transaction(log_message VARCHAR2, log_level NUMBER) AS
  PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
  INSERT INTO logs(log_text, log_level) VALUES(log_message, log_level);

  IF log_level = 0 THEN
    ROLLBACK;
  ELSE
    COMMIT;
  END IF;
END;
/

Select the statements that are correct when calling this function within another transaction.

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59 more premium Oracle PL/SQL questions

Bind Variables, Insert Employee, Query Performance, Savepoint, Lap Times, Remove Element, Merge Lists, Employee Salary, Index Performance, Movies, Users and Accounts, Matching Clothes, River Discharge, User Statistics, Computer Hardware Providers, Coworking Spaces, Manager Sales, Agents, New Wages, Research Funding, Guest List, Student Management, Product Data, Projects, Authors, Autocomplete, Bank Branches, Cheapest Product, Countries, Developers, Hospital Patients, Menu Items, Rectangles, Restaurant Menu, Poll, Sales, Employee Manager, Auto Show, Welfare Organization, Tasks, Student Rankings, Student Activities, Youngest Child, Movies Live, Average Salary, Movie Genres, ATM Locations, Transactions, Merge Stock Index, Ban Users, Delete Orders, Department Report, SMS Messages, Ingredients, Roads, Karting Leaderboard, Player Division, Popular Category, Retirees.

Skills and topics tested

  • Oracle PL/SQL
  • Bind Variables
  • Exceptions
  • Indexes
  • Performance Tuning
  • Transactions
  • Built-In Functions
  • Tables
  • Set
  • Union
  • Cursors
  • SQL
  • Aggregation
  • Select
  • Subqueries
  • Alter Table
  • Constraints
  • Database Schema
  • Conditions
  • Joins
  • Database Normalization
  • Collections
  • CTE
  • Recursion
  • Left Join
  • Right Join
  • Update
  • SQL CASE
  • Create Index
  • Create Table
  • Ordering
  • Bug Fixing
  • Group by
  • Delete
  • Insert
  • Views

For job roles

  • Data Analyst
  • Oracle Database Administrator
  • PL/SQL Developer

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