Netezza Archives - DWgeek.com

Sqoop Export Hive Tables into Netezza

Hadoop systems are mostly best suited for batch processing. Reporting is not recommended on Hadoop Hive or Impala. Sometimes to enable faster reporting, organizations transfer the processed data from Hadoop ecosystem to high performance relational databases such as Netezza. In this article, we will check Sqoop export Hive tables into Netezza with working examples. Sqoop Export Hive Tables into Netezza In some cases, data processed by Hadoop ecosystem may be needed in production systems hosted on relational databases to help run additional critical business functions and generate reports. The Sqoop can exports…

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March 8, 2019

BigData

How to Import Netezza Tables using Sqoop?

With growing data, organizations are moving computation part to Hadoop ecosystem. Apache Sqoop is an open source tool to import data from relational databases to Hadoop and vice versa. Apache Sqoop is one of the easiest tool to import relational database such as Netezza into Hadoop ecosystem. The Sqoop command allows you to import all tables, single table, execute query and store result in Hadoop HDFS. In this article, we will check how to import Netezza tables using Sqoop with some practical examples. Sqoop uses a connector based architecture which…

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March 7, 2019

Apache Spark

How to Connect Netezza Server from Spark? – Example

I was working on one of the Spark project where we had a requirement to connect Netezza server from Spark. Integrating Netezza and Apache Spark enable analytic capabilities using the Apache Spark for data resides in Netezza database. There are various ways you can use to connect Netezza server from Spark program. You can also connect to the Netezza server from Pyspark. So, Why to Connect Netezza Server from Spark? This is an interesting question. To answer this, let us check how Apache Spark works. Apache Spark works on data…

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March 4, 2019

Netezza

Netezza Query History details using nz_query_history Table

Sometimes you may need to verify the queries that are running for a long time on production servers. There are several ways that you can perform this task. For instance, you can use Netezza administrative tool to verify long running queries. In this post, we will check how to get Netezza query history details using nz_query_history table. Netezza query history configuration steps are simple. You can follow below steps to use Netezza query history views to collect Netezza queries historical data in separate history table in optional history database. Why…

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January 24, 2019

Netezza

Steps to Generate and Load TPC-DS Data into Netezza Server

The TPC-DS benchmark model decision support system of a retail product supplier. This includes various queries and data maintenance. Database schema, data population, queries, data maintenance model and implementation rules have been designed to be broadly representative of new or modern decision support systems. In this post, we will discuss steps to generate and load TPC-DS data into Netezza or puredata systems server. What is TPC-DS? The Transaction Processing Performance Council (TPC) is a benchmark model decision support system. Several major firms are member of TPC. You can get more…

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December 28, 2018

Netezza

Different Methods to Display Netezza Table Statistics

IBM Netezza or Puredata Systems uses the cost based optimizer to determine best methods determine redistribution, scan, join, join orders. Optimizer uses statistics to generate optimal execution plan. You need collect statistics on tables or databases regularly. In my other post, Netezza Generate Statistics: A Guide and Best Practices, we have discussed some of best practices to generate statistics on Netezza tables. In this post, we will discuss different methods to display Netezza table statistics with some examples. What Are Table Statistics? Tables statistics are nothing but information about each column…

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December 20, 2018

Netezza

How to Connect Netezza using JDBC Driver and working Examples

Netezza is one of the widely used MPP database. You connect to it by using various methods and programming languages. Netezza supports ODBC, OLEDB and JDBC drivers for connections. Connection to Netezza using JDBC driver is easy and one of the widely used method. In this article, we will check how to connect Netezza using JDBC driver and some working examples. Netezza JDBC Driver Netezza provides JDBC driver, you can use that driver from any programming language that supports JDBC connections such as Java, Python etc. You can download JDBC…

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December 2, 2018

Netezza

Netezza Stored Procedure ARRAY Variables and Examples

The ARRAY data type is a composite data value that consists of zero or more elements of a specified specific data type. Netezza nzplsql allows you to define ARRAY types along with other scalar variables. In this article, we will check Netezza stored procedure ARRAY variables, declaration and examples. Netezza Stored Procedure ARRAY Variables You can define and use VARRAY in Netezza stored procedures. You can insert values to array variables, increase array size in case if length is exceeded and remove elements from array. ARRAY variables are allowed anywhere…

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June 6, 2018

Netezza

Netezza Data Transformation Functions and Examples

You must secure the data in case if you are working on various sensitive and confidential data. Netezza does provides various transformation functions that you can use to change the data representation. In this article, we will check Netezza data transformation functions and some examples. Netezza Data Transformation Functions The data transformation functions in Netezza are used to change data into different representation for purpose of security (encryption and decryption), space saving (compression) and save time to transmit data across various medium. IBM used industry standard algorithms to build these…

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May 19, 2018

Netezza

Netezza Phonetic Matching Functions and Examples

Netezza nzsql language support phonetic matching functions, that is, you can encode names into phonetic representations. These functions are useful to match names that are based on their pronunciation and reduce misses that might result from spelling variations. In this article, we will check types of Netezza phonetic matching functions and usage with some examples. Netezza Phonetic Matching Functions There are two types of Phonetic matching functions supported in Netezza: SoundEx NYSIIS algorithm Double Metaphone (dbl_mp) algorithm There are three helper functions in Double Metaphone: Primary Metaohine (pri_mp) Secondary Metaphone…

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May 16, 2018