**索引是把双刃剑,用得好是屠龙刀,用不好就是自残剑。** 建索引之前,先用 EXPLAIN 看执行计划;建完之后,定期通过监控系统清理无效索引。 前言 不管你是面试还是日常调优,只要聊到数据库性能,“索引”几乎一定是绕不开的话题。 很多小伙伴 ...
Oracle is undervalued at $150, with a fair value estimate between $173 and $180 per share on a 12-month view. Despite negative free cash flow and $162B in debt, ORCL's $553B RPO and accelerating ...
Open Distro for Elasticsearch enables you to extract insights out of Elasticsearch using the familiar SQL query syntax. Use aggregations, group by, and where clauses to investigate your data. Read ...
1 Faculty of Science, Ontario Tech University, Oshawa, Canada. 2 Faculty of Business and IT, Ontario Tech University, Oshawa, Canada. 3 Legion Development Group, Oshawa, Canada. This study presents a ...
A Technical Project Manager with expertise in agile methodologies, project planning, quality assurance, and more. SQL (Structured Query Language) is the universal language for managing and interacting ...
pre-commit is a nice development tool to automatize the binding of pre-commit hooks. After installation and configuration pre-commit will run your hooks before you commit any change. CREATE OR REPLACE ...