SQL数据库数据的相关内容

文章 2017-07-03 来自：开发者社区

SQL数据库性能测试，插入数据

SQL Server中，测试插入大量数据，执行时间。 declare @begin_date datetime declare @end_date datetime select @begin_date = getdate() declare @counter int set @counter=0 while(@counter < 1000000) begin INSERT INTO te....

问答 2016-07-01 来自：开发者社区

SQL如何查找数据库多栏位重复数据？

首先，我有一个电影数据库，这是其中的一部分：[rel] movie_id, star_id, time一般是一个电影，对应多个演出明星。本来相同的movie_id 和 star_id 在数据库中只能出现一次。可是之前系统设计漏洞，导致重复插入了多项数据：譬如：功夫，周星驰功夫，黄圣依功夫，周星驰等于是我们数据库中出现了两个功夫, 周星驰。请问各位朋友，有没有可以设计一个sql语句，帮我快....

问答 2016-06-14 来自：开发者社区

SQL数据库一对多关系如何取出多条数据

现在有两张表,表一是users(用户表)表二是works(作品表)一个用户可以有多个作品,查询后显示结果如下,请问怎么查询?

问答 2016-06-14 来自：开发者社区

sql语句怎么查询数据库最新两天的数据

我不知道我的数据库最新数据是哪天的，我要查询最新两天的所有数据，sql语句改怎么写，怎么写后面的

文章 2014-11-24 来自：开发者社区

使用SQL语句清空数据库所有表的数据

原文:使用SQL语句清空数据库所有表的数据近来发现数据库过大,空间不足,因此打算将数据库的数据进行全面的清理,但表非常多,一张一张的清空,实在麻烦,因此就想利用SQL语句一次清空所有数据.找到了三种方法进行清空.使用的数据库为MS SQL SERVER. 1.搜索出所有表名,构造为一条SQL语句 declare @trun_name varchar(8000)set ...

文章 2014-10-23 来自：开发者社区

C#同步SQL Server数据库中的数据--数据库同步工具[同步已有的有变化的数据]

C#同步SQL Server数据库中的数据--数据库同步工具[同步已有的有变化的数据] 1. C#同步SQL Server数据库Schema 2. C#同步SQL Server数据库中的数据--数据库同步工具[同步新数据] 3. 分析下自己写的SQL Server同步工具的性能和缺陷接着写数据同步，这次可以把有变化的数据进行更新了： 1.SQL批量更新函数： //...

文章 2014-10-22 来自：开发者社区

C#同步SQL Server数据库中的数据--数据库同步工具[同步新数据]

C#同步SQL Server数据库中的数据 1. 先写个sql处理类： using System; using System.Collections.Generic; using System.Data; using System.Data.SqlClient; using System.Text; namespace PinkDatabaseSync { class DBUtil...

文章 2013-04-26 来自：开发者社区

sql语句操作数据库重复数据

1.示例表 Create Table TableA ( id int, NameA varchar(10) ) 2.判断NameA列是否有重复数...

文章 2011-12-17 来自：开发者社区

SQL Server跨数据库复制数据

相同结构表不同数据库拷贝数据: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->insert into 目标数据库名.dbo.表名 select * from 源数据库名.dbo.表名 ...

文章 2008-08-28 来自：开发者社区

如何在SQL Server数据库中加密数据

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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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