Category: IT/Computer Science Review: As an aspiring database administrator, I have been looking for resources to help me prepare for the OCA Oracle Database 12c Administrator certification exam. After reviewing several products in this category, I have found that the Advanced Oracle PL/SQL Developer's Guide - Second Edition and the OCA Oracle Database 12c Installation and Administration Exam Guide (Exam 1Z0-062) are particularly useful for my needs. The Advanced Oracle PL/SQL Developer's Guide is a comprehensive resource that covers all aspects of Oracle PL/SQL development, including syntax, data types, functions, procedures, and more. The guide includes numerous examples and exercises to help you practice your skills and reinforce your knowledge. Additionally, the second edition has been updated with new features and improvements in Oracle Database 12c, making it a valuable resource for anyone looking to work with this version of the database. The OCA Oracle Database 12c Installation and Administration Exam Guide is specifically designed to help you prepare for the OCA Oracle Database 12c Administrator certification exam. The guide covers all aspects of installing, configuring, and managing an Oracle Database 12c environment, including database security, backup and recovery, performance tuning, and more. It also includes practice questions and review materials to help you assess your progress and identify areas where you need to focus your studies. Overall, I found both of these products to be highly useful for my needs as a database administrator in training. The Advanced Oracle PL/SQL Developer's Guide provided me with the knowledge and skills I needed to work effectively with Oracle databases, while the OCA Oracle Database 12c Installation and Administration Exam Guide helped me prepare for the certification exam that would validate my expertise in this area. If you are looking for resources to help you learn about Oracle PL/SQL development or prepare for an Oracle database administration certification exam, I highly recommend these products.