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Step-by-step articles on MCP servers, AI + database integrations, and more. — Page 2
Why Your AI's Search Misses Rows That Clearly Match
Asked for customers with status 'Active' and it missed rows spelled 'active'. Whether that filter matches depends on which database you're connected to — Postgres string comparison is case-sensitive by default, MySQL usually isn't, SQL Server depends on collation.
August 26, 2026
Why Your AI's Filter Silently Skips Rows With NULL Values
Asked for 'customers without a plan assigned' or 'orders that aren't cancelled' and got back fewer rows than you know exist. NULL doesn't behave like a normal value in SQL comparisons — != and NOT IN both silently drop rows they should include.
August 20, 2026
Why Your AI's SUM Comes Back NULL Instead of Zero
Asked for total revenue for a plan with no sales this month and got back NULL, or a follow-up calculation that turned every number into nothing. SUM (and AVG, MAX, MIN) return NULL when there are zero matching rows — not zero — and that NULL poisons anything built on top of it.
August 20, 2026
Why Your AI Gets a Different Answer to the Same Database Question
Asked the same question twice and got two different lists of 'top 10 customers' or 'recent signups' — with the same data, same filters, no error. Usually a LIMIT with no ORDER BY, which Postgres and MySQL don't guarantee stays consistent.
August 19, 2026
Why Your AI Database Tool Says 'Too Many Connections'
Your AI database connector worked fine, then started failing with 'too many connections' or 'remaining connection slots are reserved' — especially on Supabase or Neon. What's actually happening, and why the fix is usually the pooler endpoint, not a bigger plan.
August 19, 2026
Why Your AI's Numbers Are Too High: The JOIN Fan-Out Problem
The query ran fine, no errors, and the total revenue or order count came back way higher than you know it should be. Almost always a JOIN multiplying rows before the SUM or COUNT runs — here's how to spot it and how to ask AI to avoid it.
August 19, 2026
Why Your AI Database Connector Stopped Working Today
Your AI database connection worked all week and suddenly errors out. Before you assume it's broken: most managed MCP gateways enforce a daily request cap per plan, separate from any database or model provider limit.
August 15, 2026
Why Your AI Database Tool Only Shows You 500 Rows
Asked your AI for 'all cancellations' and got exactly 500 rows back with no explanation? That's a deliberate row cap on raw SQL results, not a bug — here's why gateways truncate, and how to ask the right way instead.
August 15, 2026
Why Your AI Database Query Times Out (and How to Fix It)
Your AI's query worked on a small table and times out on a big one. What's actually timing out — the database, the gateway, or the AI client — and how to fix each layer without giving the AI unlimited time on production.
August 11, 2026
Does the AI Write the SQL, or Does MCP?
When Claude or ChatGPT 'queries your database,' who actually writes the SQL? A clear breakdown of the four tools an MCP database gateway exposes — list_tables, describe_table, query_table, execute_sql — and which one is running when.
August 11, 2026