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🖥️ IBM Relational Database Administration Capstone Project\n\n\u003cp float=\"left\"\u003e\n    \u003cimg src=\"https://images.credly.com/size/340x340/images/9a51c3c8-a871-4931-9933-98d38ec98b16/Coursera_20Relational_20DB_20Administrator_20Capstone.png\" width=\"300\" /\u003e\n    \u003cimg src=\"https://i.postimg.cc/VkjN94rY/phpmyadmin.jpg\" width=\"300\" /\u003e\n\u003c/p\u003e\n\nThis capstone project highlights the hands-on application of core relational database administration skills by simulating a real-world enterprise environment.  \nI played the role of a **Database Administrator (DBA)** responsible for designing, managing, and securing both OLTP and OLAP systems using MySQL and PostgreSQL, with automation and performance tuning included.\n\n---\n\n## 🚀 Project Overview\n\nAs a final project in the [IBM Relational Database Administrator Professional Certificate](https://www.coursera.org/professional-certificates/ibm-database-administrator), this capstone involved:\n\n- Designing transactional and analytical databases  \n- Implementing ETL workflows using Apache Airflow  \n- Performing backups and automating restore procedures  \n- Securing data with encryption and granular access control  \n- Optimizing SQL queries and database memory usage  \n\n---\n\n## 🧠 What I Learned\n\n✅ OLTP and Data Warehouse schema design and deployment  \n✅ Data encryption, column-level access control, and secure user management  \n✅ Backup, restore, and cron job automation  \n✅ Performance tuning with indexing and query optimization  \n✅ End-to-end ETL pipeline development using Apache Airflow\n\n---\n\n## 🧰 Skills \u0026 Tools Used\n\n- 🐬 MySQL \u0026 🐘 PostgreSQL  \n- ⚙️ Apache Airflow  \n- 🔐 SQL Grants \u0026 Data Encryption  \n- 💾 Backup \u0026 Restore Scripting (cron, `.sh`)  \n- 📊 OLTP \u0026 OLAP Systems  \n- 🧱 Schema Design \u0026 Indexing  \n- 🐧 Linux Terminal, Shell Scripting  \n\n---\n\n## 📦 Capstone Modules Breakdown\n\n| Module | Description |\n|--------|-------------|\n| 🔧 **1. OLTP Database \u0026 Platform Architecture** | Created MySQL-based OLTP schema with indexes and constraints |\n| 🏗️ **2. Data Warehouse Design** | Built dimensional models using PostgreSQL with star schema |\n| 🔁 **3. ETL \u0026 Pipelines** | Developed Apache Airflow DAGs to automate data ingestion and transformation |\n| 💾 **4. Backup \u0026 Restore Automation** | Scripted full backup and recovery pipelines using cron and shell |\n| 🔐 **5. Security \u0026 Optimization** | Encrypted sensitive data, configured user access roles, and optimized queries |\n| 📤 **6. Final Submission** | Submitted full database system with automation and documentation |\n\n---\n\n## 📂 Project Assets\n\n```\n\n📁 OLTP Schema \u0026 Sales Database (MySQL)\n📁 PostgreSQL Data Warehouse\n📁 Apache Airflow DAGs \u0026 ETL Scripts\n📁 Backup/Restore Scripts (cron, bash)\n📁 Security Scripts (GRANT, ENCRYPTION)\n📁 Optimization SQL (Indexes, EXPLAIN)\n\n```\n\n---\n\n## 🧪 Lab Highlights\n\n### 🔐 Access Management \u0026 Data Encryption  \n- Defined roles: `db_admin`, `db_analyst`, `db_reporter`, `db_external`  \n- Encrypted sales amount fields using `VARBINARY` and passphrases  \n- Column- and table-level GRANT statements\n\n### ♻️ Backup \u0026 Restore Automation  \n- Created cron jobs to back up the sales database every 3 minutes  \n- Wrote scripts to truncate tables, zip backups, and restore via terminal  \n- Maintained logs and `.tar.gz` backup archives\n\n### 🔁 ETL with Apache Airflow  \n- Parsed web logs and loaded structured data to databases  \n- Implemented DAGs for extract → transform → load  \n- Used custom Python scripts for ingestion and transformation\n\n### 🧱 Data Warehouse \u0026 Reporting  \n- Created dimensional tables: `DimDate`, `DimCategory`, `DimCountry`, `FactSales`  \n- Performed OLAP queries using `ROLLUP`, `CUBE`, and `GROUPING SETS`  \n- Generated Materialized Query Tables (MQTs)\n\n### ⚙️ Database Optimization  \n- Created indexes and tested pre/post-query performance  \n- Analyzed memory usage using MySQL EXPLAIN  \n- Improved query execution time by optimizing data types and schema\n\n---\n\n## 🧠 Summary\n\nThis project brought together all major elements of relational database administration, allowing me to:\n- Simulate enterprise-grade database systems  \n- Automate routine tasks using Linux tools  \n- Secure and manage data access at scale  \n- Apply performance tuning methods in real-world contexts\n\n---\n\n## 🏆 Outcome\n\n✅ **Confident in managing RDBMS systems (MySQL, PostgreSQL)**  \n✅ **Experienced with automation, security, and optimization workflows**  \n✅ **Ready for DBA or backend-focused roles involving data infrastructure**\n\n---\n\n## 💼 Ideal For\n\n- Recruiters seeking skilled DBAs or backend engineers  \n- Employers looking for automated, secure data systems  \n- Projects requiring optimized RDBMS solutions and ETL integration\n\n---\n\n## 🔗 Related Projects\n\n- [ETL Automation using Apache Airflow](#)\n- [Data Warehouse with PostgreSQL](#)\n- [SQL Query Optimization \u0026 Indexing](#)\n\n---\n\n## 🤝 Let’s Connect\n\nExplore more of my work and collaborations:  \n🌐 [My Portfolio](#) | 💼 [LinkedIn](#) | 📂 [GitHub Projects](#)\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwillie-conway%2Frelational-database-administration-capstone-project","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fwillie-conway%2Frelational-database-administration-capstone-project","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwillie-conway%2Frelational-database-administration-capstone-project/lists"}