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Participants should have good SQL knowledge else, the first course should be suggested. All certifications in order are mandatory. Oracle course duration and fees PL/SQL Tutorial - PL/SQL is a combination of SQL along with the procedural features of programming languages. It was developed by Oracle Corporation in the... PL/SQL tutorial provides basic and advanced concepts of SQL. Our PL/SQL tutorial is designed for beginners and professionals. PL/SQL is a block structured.