创建包含MySQL和SQL Server数据库所有字段类型的表需要细致的规划和执行。MySQL和SQL Server是两个不同的数据库管理系统，每个系统都有其特定的数据类型集合。本指南旨在提供一种方法，通过比较和匹配两个数据库系统的数据类型，实现创建一个包含所有这些数据类型的表。 MySQL 数据类型概览 MySQL数据库支持多种数据类型，...

文章 2024-03-06 来自：开发者社区

【MySQL】— —熟练掌握用SQL语句实现数据库和基本表的创建。熟练掌握MySQL的安装、客户端登录方法；熟练掌握MySQL的编码、数据类型等基础知识；掌握实体完整性的定义和维护方法、掌握参照完整性

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文章 2023-11-09 来自：开发者社区

MySQL防止重复插入（数据库层where方法解决）

直接贴出解决的SQL：INSERT INTO tablename (属性1,属性2) SELECT '值1', '值2' FROM dual WHERE EXISTS ( SELECT 1 FROM tablename WHERE );参考博客：https://blog.csdn.net/weixin_40805079/articl...

文章 2023-10-23 来自：开发者社区

MySQL索引原理与实践：优化数据库性能的有效方法3.0

MYSQL索引全文索引，主键索引，唯一索引，覆盖索引，组合索引，普通索引，外键索引，空间索引，前缀索引，哈希索引等在接下来MySQL索引原理与实践3.0中我会重点介绍mysql索引优化等一些方面相关的理论与实践，有小伙伴是从3.0开始看的，可以优先看一下1.0/2.0 http://t.csdnimg.cn/hHn9A一，MySQL深度优化建议1. 索引优化： - 确保选择合适的索....

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