Question: I'm looking for a service that can help me explain complex SQL queries in plain English.

If you need a service to translate SQL queries into plain English, TEXT2SQL is a top pick. This AI-based SQL query builder translates natural language text into SQL and back again, supporting several SQL dialects like MySQL, PostgreSQL and Snowflake. It can generate and explain SQL queries, fix errors and handle custom database schema. With its API access and priority support, it's good for both learning SQL and automating your work, and costs $7 per month or $29 per year.

Another strong option is SQLAI.ai, which offers a broader range of features for generating, editing, explaining and optimizing SQL and NoSQL queries. It supports a variety of databases and offers inline comments to explain what queries are doing, making complex query operations a lot easier. It's geared for people who want to boost productivity and speed up their workflow, including developers, data analysts and anyone who wants to get more out of SQL.

If you're on a tighter budget, AI2SQL offers a range of features including text-to-SQL conversion, intelligent SQL optimization and query explanation. It supports a variety of databases, including SQL, MySQL and PostgreSQL, and offers different pricing tiers depending on your needs. It's good for both beginners learning SQL and pros looking to get more done, and offers a 7-day free trial.

Last, AI Query uses AI models like OpenAI GPT and Google PaLM 2 to convert natural language prompts into SQL queries. It supports multiple database engines and lets you define database schema easily. It's good for any level of SQL expertise, with regular support on its Pro plan and priority support on its Pro+ plan for $100 per year.