1. Familiar with various database management systems, such as Oracle, MySQL, Microsoft SQL Server, PostgreSQL, etc., and have the ability to configure, manage and optimize them.2. Possess the skills of database design and modeling, including the creation, normalization and denormalization of entity relationship diagrams (ER diagrams), etc.3. Proficiency in SQL (Structured Query Language) programming, able to write and optimize complex SQL queries, stored procedures, triggers and functions, etc.4. Understand the strategies and methods of data backup and recovery, and be able to formulate and implement appropriate backup and recovery plans.5. Ability to optimize database performance, including index design, query optimization, table partitioning, cache configuration, etc.6. Use database monitoring tools and performance analysis tools to monitor and analyze the running status of the database in real time, and take necessary measures to optimize performance.