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Analytics & BI

Data Analytics,Big Data,Data Storage and Business Intelligence.

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teradata

Teradata Tutorial – DateTime Related Functions and Examples

1349 views   0 comments last modified about 12 months ago

This post summarize the common functions that are used when dealing with DateTime datatypes in Teradata.

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Create ETL Project with Teradata through SSIS

8769 views   2 comments last modified about 4 years ago

Infosphere DataStage is adopted as ETL (Extract, Transform, Load) tool in many Teradata based data warehousing projects. With the Teradata ODBC and .NET data providers, you can also use the BI tools from Microsoft, i.e. SSIS. In my previous post, I demonstrated how to install Teradata Tool...

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Querying Teradata and SQL Server - Tutorial 1: The SELECT Statement

30172 views   7 comments last modified about 4 years ago

SELECT is one of the most commonly used statements. In this tutorial, I will cover the following items: Two of the principal query clauses—FROM and SELECT Data Types Built-in functions CASE expressions and variations like ISNULL and COALESCE. * The functio...

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[C#] Connect to Teradata Database via .NET Data Provider

4511 views   2 comments last modified about 4 years ago

In this post, I will demonstrate how to connect to Teradata database via .NET Data Provider for Teradata using C#. Prerequisites Install the .NET Data Provider for Teradata from the following link: ...

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Connect to Teradata Virtual Machine Guest from Windows Host

5850 views   16 comments last modified about 4 years ago

In my previous posts about Querying Teradata and SQL Server, I logged into the virtual machine graphic interface to manage the database. However, I constantly found it is resource intensive as there is only 4GB memory in my laptop. Instead, I will use text mode to start the virtual machine and co...

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Querying Teradata and SQL Server - Tutorial 2 Filtering and Sorting

3109 views   2 comments last modified about 4 years ago

Tutorial –1 For Teradata developers, if you have no SQL Server installed, please go to the following link to download the SQL Server 2014 Expression Edition. ...

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Querying Teradata and SQL Server - Tutorial 0: Preparation

2821 views   0 comments last modified about 4 years ago

In this serial, I will compare Teradata SQL with T-SQL with samples provided. This is mainly prepared for SQL Server DBAs, Developers and other users to help them quickly master the common used SQLs in Teradata platform. Similar to T-SQL, Teradata SQL implements most part of the ANSI SQL with ext...

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sql server

SQL Server中的联合主键、聚集索引、非聚集索引

637 views   0 comments last modified about 9 years ago

我们都知道在一个表中当需要2列以上才能确定记录的唯一性的时候,就需要用到联合主键,当建立联合主键以后,在查询数据的时候性能就会有很大的提升,不过并不是对联合主键的任何列单独查询的时候性能都会提升,但我们依然可以通过对联合主键中的首列除外的其他列建立非聚集索引来提高性能。关于索引,可以参考我的这篇文章:http://hi.baidu.com/1987raymond/blog/item/a0f7b11062e1330a213f2e26.html

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sql server

sql 分页存储过程

244 views   0 comments last modified about 10 years ago

个人感觉这个存储过程写得比较的好:转载自:http://www.cnblogs.com/eme/archive/2006/12/19/597275.html

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SQLite Abort due to constraint violation

478 views   0 comments last modified about 10 years ago

今天自己使用SQlite数据库的时候创建了一个表 大致是:Create TABLE [Logs](
[LogID] int PRIMARY KEY NOT NULL
,[LogTitle] varchar(100)
,[LogContent] text
,[LogType] int NOT NULL DEFAULT 0
,[LogAddTime] datetime
);

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