As an experienced web developer with a rich proficiency in WordPress, I understand the vital nature of your issue and the need for an immediate solution. I have 8+ years of focused expertise in WordPress management, SQL troubleshooting, and server optimization - all domains that will come into play when resolving your 'database connection' error and other migration-related issues. I've tackled intricate problems like these before, carrying out successful migrations swiftly and efficiently.
Throughout my career, I have consistently prioritized effective communication, mindful of how crucial it is during tight deadlines. By choosing me for this urgent task, expect transparent updates every step of the way. More than that, my work does not end at the 'fixing' stage; I diligently test to ensure optimal performance to guarantee a seamless transition and restore your website's full functionality.
Finally, I believe in building long-term relationships. So rather than just fixing issues, I'll accompany you beyond this project. You will receive my free technical support even after the completion of the task because your satisfaction is of utmost importance. Overall, with my range of expertise in web designing and development as well as server management per your mentioned requirements, I am best suited to swiftly address your urgent WordPress migration issue while being thorough and ensuring the effectiveness of the solution. Let's get your website back up-and-running!