SQL Server、MySQL、PostgreSQL：主流数据库SQL语法异同比较在当今的数据库管理领域，SQL Server、MySQL和PostgreSQL是三个最流行的关系型数据库管理系统。它们都使用SQL作为查询语言，但在语法和功能实现上存在差异。理解这些差异对于开发者来说是至关重要的，特别是在多数据库环境下开发和迁移应用时。本...

文章 2023-07-03 来自：开发者社区

kingbaseES（人大金仓）数据库语法和常用函数以及踩坑记录

前言最近公司弄了个新项目，数据库指定使用kingbase数据库刚开始一看这名字都不知道这是啥数据库，后来百度一搜，看到中文名字就知道了。虽然没用过，但那几个国产数据库也听说过这不，刚开始用，语法都不熟悉，有的百度找，有的自己试，用过的语法和函数在这里记录一下空值替换函数nullif(替换值，原始值）意思是如果原始值为null，则输出替换值（跟其他数据库的函数正好反过来了，其他ifnull、nvl....

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更新时间 2024-09-02 09:13:01

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