Netezza

Netezza DBFit Connection File and Setup

For Data Warehouse developer, DBFit is a neat unit – testing tool for database objects and stored procedures. This tool allows you to write the test cases in a tabular, relational form, without requiring you to learn or use an object oriented language. In this article, we will discuss about the Netezza DBFit connection and setup. Please comment if you need anything to be added or missing. Read: Netezza Aginity Setup and Configurations Netezza ODBC setup Create Netezza DBFit Connection File The DB conn file will contain all the necessary…

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February 11, 2017
Netezza

Netezza Update Join Syntax – Update using other Table

Every application that require the data; data storage is very much important. In the digital world, we use databases (in fact tables) to store information. Data is collected over the time and it may or may not be accurate. In some cases you may want to update the table based on the data available in other table over same or other database on same server. In this article, we have explained the Netezza Update Join Syntax and example on how to update using Data in other Table. Read: How Netezza…

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February 9, 2017
Netezza

Netezza Organize On Syntax and Examples

The Netezza Organize on is one of important feature introduced in the Netezza data warehouse appliance. With the help of Organize on keys, you can create the clustered base tables (CBT). You can specify up to four columns in organize on key. Read: Cluster Based Tables - CBT Netezza TwinFin Architecture IBM Netezza nzsql Command and its Usage Netezza ALTER TABLE Command Netezza Organize On Keys IBM Netezza Organizing keys are useful for the more frequently used columns that you specify as keys are used in query predicates, alone or in…

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February 9, 2017
Netezza

Netezza nzstats Command and Usage

The Netezza nzstats command allows you to view sets of related operational information that is, statistics on the tables. These sets are organised as groups of related statistics or tables that contain rows of related statistics. The statics are very much important in Netezza appliances. System uses the up-to-date stat information to plan and execute the queries. Netezza appliance works better if the system catalog tables have up-to-date stats. Displaying System Statistics using Netezza nzstats Command The Netezza nzstats command displays operational statistics about system capacity, system faults, and system…

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January 24, 2017
Netezza

Netezza nzsql Windows System Exit Codes

In this article, Netezza nzsql Windows system exit codes are discussed. These exit codes are very much important when you are building ETL/ELT operation or executing nzsql commands on windows systems. From a Windows system command prompt, the exit codes from the nzsql command provide information about the execution status of the SQL commands. Read: Netezza nzsql exit codes for Unix/Linux Systems Netezza nzsql commands and is Usage Netezza SET ON_ERROR_STOP and Examples Netezza nzsql Windows System Exit Codes When you are running queries interactively at the nzsql prompt or…

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December 30, 2016
Netezza

Netezza nzsql Exit Codes for UNIX/Linux Systems

In this article, Netezza nzsql exit codes are discussed. These exit codes are very much important when you are building ETL/ELT operation using shell scripts. On UNIX/Linux systems such as the NPS, the Netezza nzsql exit codes provide information about the execution status of the SQL commands. Read: Netezza nzsql Command and its Usage Netezza SET ON_ERROR_STOP and Examples Netezza nzsql Exit Codes When you are running queries interactively at the nzsql prompt or by using a script (nzsql -f), the command returns one of the following exit codes: 0:…

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December 30, 2016
BigData

Hadoop HDFS Architecture Introduction and Design

In this post you will learn about the Hadoop HDFS architecture introduction and its design. The Hadoop Distributed File System (HDFS) is a Java based distributed file system, designed to run on commodity hardwares. It has many similarities with existing available distributed file systems. Hadoop HDFS Architecture Introduction HDFS is highly fault-tolerant and is designed to be deployed on low-cost hardware. Hadoop HDFS provides high throughput access to application data and is suitable for applications that have large volume of data sets. HDFS has demonstrated production scalability of up to…

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December 3, 2016
Data Warehouse

Data Warehouse Fact Constellation Schema and Design

Basically, Data warehouse fact constellation schema is viewed as a collection of many star schemas. For each star schema or snowflake schema it is possible to create Fact Constellation schema. This schema is one of the widely used data warehouse design methodology and is also called Galaxy schema. Sophisticated application required the Fact constellation schemas. Read: Star Schema model in Data Warehouse Snowflake Schem Model in Data Warehouse Step by Step Guide to Dimensional Data Modeling Slowly Changing Dimensions (SCD) in Data Warehouse Rapidly Changing Dimension in Data Warehouse Representation…

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December 3, 2016
Netezza

Different types of Netezza Trim Functions and Examples

The Netezza TRIM functions which are available in Netezza NZSQL are used to remove specified prefix or suffix from a string. The most common pattern being removed is white spaces. Netezza support different trim function that you can be used to trim or remove the particular character or white spaces. A Netezza trim functions includes TRIM, LTRIM, and RTRIM. Read: Netezza String Functions and Examples Netezza LEFT and RIGHT Functions and Examples IBM Netezza Analytical Functions How to use Netezza Replace Function and Examples Netezza Array Functions and Examples Netezza…

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December 2, 2016
Netezza

Netezza Dual Table Alternative

If you have come from the Oracle database background then you will be confusing and frustrating to find there is no Netezza dual table. In Netezza you do not need one; believe me when I am saying you do not need dual in Netezza. When you are working on MPP appliance like Netezza, you can run your SQL queries or calculations without any dummy table i.e. dual table oracle. Read: Netezza Alter Table Commands and Examples Netezza LIKE Statement and Pattern matching Examples IBM Netezza Split Delimited Fields into Table…

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December 1, 2016