It's okay for preparing for a qualification exam.

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It contains only the essentials required to obtain the SQLD certification. This is a learning process that will help you acquire the SQLD certification by solving various examples directly, starting from setting up the development environment and building your skills.

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인프런 10주년! 사랑주간 전체 할인

Getting SQL Developer (SQLD) Certification Part 1

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SQLD Certification Exam Guide and SQL Developer Installation and Use

Understanding Data Modeling

Data Model and Performance