It was great that you explained in detail concepts I only had a rough understanding of, allowing me to learn the accurate concepts once more before moving on.

saichoi0424

Not only developers, but also planners and data analysts learn databases step-by-step, starting from SQL basics.

Kim Younghan's Practical Database Introduction - SQL First Steps for All IT Professionals (Step by Step from SQL)

데이터베이스

데이터베이스 관리 시스템

DBMS/RDBMS

mysql

sqld

SQLD

입문

초급

중급이상

MySQL

SQL 개발자 자격시험

Course Introduction and Class Materials

Database Introduction

Database startup

SQL - Data Management

SQL - Query and Sorting

SQL - Data Processing

SQL - Aggregation and Grouping