This tutorial explains how to integrate Spring AI's Model Context Protocol (MCP) with Chat2DB to enable secure, natural‑language queries against a PostgreSQL database, covering configuration, core Java code, execution flow, and sample SQL queries.
When processing massive MySQL result sets, loading all rows into JVM memory can cause OOM and slow performance, so this guide compares three approaches—regular pagination, streaming queries using server-side cursors, and cursor‑based fetchSize control—detailing their implementations, MyBatis configurations, and trade‑offs.
This article examines why encrypted data is unfriendly to fuzzy search, categorises three implementation strategies—naïve, conventional, and advanced—analyses their advantages and disadvantages, and provides practical guidance and reference links for securely enabling fuzzy queries on encrypted fields.
This article explains how to retrieve the names of students who have selected both course 1 and course 2 in a MySQL table by using a GROUP BY clause together with a HAVING condition that counts distinct course IDs, avoiding incorrect results from a simple IN filter.
This article explains how to design a MySQL table for product sales statistics and compares several query strategies—including loop queries, OR concatenation, mixed filtering, and the SQL‑92 row‑by‑row comparison—to efficiently retrieve sales data for dynamic sets of business institutions and their products in a single indexed query.
This article explains how to retrieve sales statistics for multiple business units and their associated products from a MySQL table, compares several implementation approaches—including loop queries, OR concatenation, mixed filtering, and row‑comparison using MyBatis dynamic SQL—evaluates index usage, and provides the final recommended solution.
This article explains how to leverage PostgreSQL's unnest and string_to_array functions to split a comma‑separated 'arrive' column and efficiently query for popular island destinations such as Maldives, Phuket, Bali, and others without writing complex regular expressions.
