SQL数据库的相关内容

文章 2018-03-07 来自：开发者社区

从零学springboot——使用jdbcTemplate的方式自定义sql进行数据库操作

引入jdbcTemplate依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> 编写一个类，...

问答 2018-03-04 来自：开发者社区

使用PL/SQL Developer连接oracle数据库

第一步，工具准备需要PL/SQL Developer工具和oracle客户端第二步，配置plsql 将下载的oracle客户端zip文件解压到E:\Program Files\instantclient\，接着打开PLSQL工具，弹出登陆界面后点击cancel进入PL/SQL主界面，然后依次操作Tools–>preferences–>Connection，找到Oracle &nb...

问答 2018-02-19 来自：开发者社区

ApsaraDB For SQL Server Multi-AZ 高可用版数据库使用介绍

ApsaraDB For SQL Server Multi-AZ 高可用版数据库使用介绍引言 RDS SQL Server Multi-AZ 高可用版涵盖了SQL Server 2008 R2标准版和企业版、SQL Server 2012 标准版和企业版、SQL Server 2014 标准版和企业版、SQL Server 2016 标准版和企业版。目前能够购买的是SQL Server 20....

文章 2018-02-12 来自：开发者社区

ApsaraDB For SQL Server Multi-AZ 高可用版数据库常用功能使用介绍

文章 2018-02-12 来自：开发者社区

DC学院学习笔记（六）：数据库和SQL语言简述

数据获取告一段落了，下面接触到了数据存储与预处理。OK，先学习了数据库和SQL语言。数据存储方式 1、文本文件存储特点简单，可以直接阅读大文件不好处理数据都是字符串操作时需要把整个文件读入内存 2、数据库存储特点可进行结构化的数据存储快速地进行数据检索数据库（主要是看的哔哩哔哩的这个视频，讲得很好：https://www.bilibili.com/video/av963...

文章 2018-02-11 来自：开发者社区

阿里云数据库 SQL Server 2016 双机高可用版给您拜年了

在2018年狗年春节来临之际，阿里云数据库推出 SQL Server 2016 双机高可用版和 2012 双机高可用版，全面涵盖官方企业版和标准版，预祝大家新年事业旺旺旺。新版本底层基础架构作了颠覆性的改进，扩展性和安全性都得到了前所未有的提升，新架构下的高级特性总结如下： - 更稳定：异常宕机秒级切换，稳定性较单机版得到了前所未有的提升； - 更安全：RDS实例置于用户自己指定的私...

文章 2018-02-09 来自：开发者社区

游标遍历所有数据库循环执行修改数据库的sql命令

原文:游标遍历所有数据库循环执行修改数据库的sql命令 MSSQL数据库服务器上有很多类似的数据库，需要将这些数据库统一修改其中的某些表或者某些命令，那么就会想到用游标来遍历。先来说思路： 1，首先需要查询出所有的数据库；　　select [name] from [master].[dbo].[sysdatabases] order by [name]; --查询MSSQL中所有数据库名称 ....

文章 2018-02-09 来自：开发者社区

百万级数据库SQL优化大总结

原文:百万级数据库SQL优化大总结网上关于SQL优化的教程很多，但是比较杂乱。近日有空整理了一下，写出来跟大家分享一下，其中有错误和不足的地方，还请大家纠正补充。这篇文章我花费了大量的时间查找资料、修改、排版，希望大家阅读之后，感觉好的话推荐给更多的人，让更多的人看到、纠正及补充。 1.对查询进行优化，要尽量避免全表扫描，首先应考虑在 where 及 order by 涉及的列上...

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云数据库SQL Server，具有企业许可授权，权限更为开放，引擎功能更为强大。能完美支持Windows平台的.NET架构，支持复杂SQL查询，性能优秀，并有强大的可视化管理工具，帮助您轻松管理数据。

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