https://nlqueries.com/blog/ Notes from the NLQueries maintainers on natural language to SQL, the knowledge base, connectors and the MCP server. en Mon, 19 Oct 2026 00:00:00 +0000 https://nlqueries.com/blog/text-to-sql-explained https://nlqueries.com/blog/text-to-sql-explained How text-to-SQL works end to end: schema extraction, the knowledge base, generation, validation, execution and the one correction after a database error. Mon, 19 Oct 2026 00:00:00 +0000 text-to-sql knowledge-base validation https://nlqueries.com/blog/query-history-knowledge-base https://nlqueries.com/blog/query-history-knowledge-base Query history shows an LLM the joins and filters your team actually uses. How process-history and export-kb build it into the text-to-SQL knowledge base. Mon, 19 Oct 2026 00:00:00 +0000 knowledge-base query-history postgresql snowflake bigquery https://nlqueries.com/blog/llm-database-security https://nlqueries.com/blog/llm-database-security LLM database security is defence in depth: a read-only identity, a SQL statement policy, timeouts and result caps, and an authenticated MCP server. Mon, 19 Oct 2026 00:00:00 +0000 security postgresql mcp https://nlqueries.com/blog/text-to-sql-is-not-the-hard-part https://nlqueries.com/blog/text-to-sql-is-not-the-hard-part Getting a language model to emit SQL is close to solved. Getting an organisation to trust the answer is not, and that needs different solutions. Tue, 01 Sep 2026 00:00:00 +0000 text-to-sql trust validation https://nlqueries.com/blog/why-we-validate-sql-before-it-runs https://nlqueries.com/blog/why-we-validate-sql-before-it-runs The difference between a query that parses, a query that executes, and a query that answers the question. Three separate checks, and only one of them is free. Tue, 11 Aug 2026 00:00:00 +0000 validation text-to-sql cli https://nlqueries.com/blog/your-query-history-knows-what-your-schema-does-not https://nlqueries.com/blog/your-query-history-knows-what-your-schema-does-not Schema introspection tells you a column is called status and holds a varchar. Years of queries tell you which joins and filters anyone actually uses. Tue, 14 Jul 2026 00:00:00 +0000 query-history knowledge-base text-to-sql https://nlqueries.com/blog/the-join-problem https://nlqueries.com/blog/the-join-problem Single-table questions are easy. Most real questions are not, and when a join goes wrong the result is a plausible number rather than an error. Tue, 16 Jun 2026 00:00:00 +0000 joins text-to-sql knowledge-base https://nlqueries.com/blog/evaluating-text-to-sql-on-your-own-data https://nlqueries.com/blog/evaluating-text-to-sql-on-your-own-data Public leaderboard scores do not predict how a system will do on your warehouse. Here is the evaluation we would build if we were buying rather than selling. Tue, 19 May 2026 00:00:00 +0000 evaluation text-to-sql