Oracle OCP, MySQL OCP Certified expert, ITPUB columnist. oracle, mysql, sql server, oceanbase database expert. Worked in Hangzhou Meichuang Technology Co., LTD., as senior DBA, senior architect and project manager. More than 6 years of experience in large-scale database operation and maintenance field, mainly for oracle, good at troubleshooting, problem diagnosis, large volume (TB) migration, abnormal fault repair, bbed, etc. Rich experience in leading large-scale projects. Service industries include: communication operators, banks, finance, government units, medical care, manufacturing, universities and so on.