Netezza Archives - Page 14 of 17

Download and Configure Netezza Linux ODBC Driver

This section describes you about downloading, configuring and testing Netezza Linux ODBC driver. This process is tested on the Ubuntu 14.04. Netezza Linux ODBC Drivers are requires to connect to Netezza server from any client machine. Read: Install vmware player and Netezza emulator on Ubuntu Connecting Netezza using Python pyodbc - Working ExampleNetezza FPGA nzsql Command and its Usage nzload command and its Usage Download Netezza Linux ODBC Driver You can download Netezza Linux ODBC Driver from Netezza fix central page. Below is url for your reference: https://www-945.ibm.com/support/fixcentral/ Note that, IBM…

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September 14, 2016

Netezza

Netezza Synonyms Best Practices and Examples

Netezza synonyms allow you to create easily typed names (you can remember and type easily) for long table, view names, or any other objects. You can create SQL synonyms as an alternate way of referencing tables or views that present in the current or other databases on the Netezza same system. Netezza Synonyms allow you to create another level of abstraction for the database objects (tables, views) and that allows and enable you to swap the underlying database objects without modifying the code that references these objects. You can even…

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September 13, 2016

Netezza

Netezza WITH Clause Syntax and Examples

If you have requirement to reuse the piece of query result in same query, then you can use the Netezza WITH clause. You can also use the WITH clause to improve the speed for Netezza complex sub-queries and improve overall performance. This is also called the sub query factoring and you can use it when sub query is called multiple times. You can use the WITH Clause command to run multiple sub queries in a SELECT statement. The main advantage of Netezza WITH clause is, you can use it wherever…

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September 12, 2016

Netezza

How to use Netezza Replace Function and Examples

By default, there is no Netezza replace function. Replace function is very much needed in case if you are manipulating strings and there is a need to replace the particular value when displaying reports. Netezza provides replace function in the Netezza SQL extensions toolkit that administrator has to install and grant permission to use. Netezza Replace Function The Netezza replace() function replaces each instance of a pattern in the input with the value in the string replacement. Syntax: The replace() function has the following syntax: REPLACE(varchar input, varchar pattern, varchar…

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September 10, 2016

Netezza

Netezza Set Operators:UNION, MINUS and INTERSECT

You can use the Netezza set operators to combine similar data sets from two or more SELECT statements. Here the similar data set literally mean, the data type of the result set should also match, otherwise you have to explicitly type cast data when using Netezza set operators. Read: nzsql command and usage nzload command and usage Types of Netezza Set Operators Netezza supports the three types of set operators: UNION [DISTINCT] and UNION ALL INTERSECT [DISTINCT] EXCEPT [DISTINCT] or MINUS [DISTINCT] Netezza Set Operators Syntax: Below is the general…

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September 10, 2016

Netezza

Download and Install Netezza SQL Extensions Toolkit

The Netezza SQL Extensions toolkit is an optional package that contains additional SQL functions for IBM Netezza data warehouse appliances. The Netezza SQL Extensions toolkit contains various functions and regular expressions that are useful in day to day computations. You can download this package from the IBM site and install to particular database. Read: Netezza Advanced Date Functions and Examples dasdas Download the Netezza SQL Extensions Toolkit Login to IBM fix central site given below and download sql-ext-version.tar.gz file. Download Extension toolkit here Once the software is downloaded copy that…

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September 9, 2016

Netezza

Netezza Dynamic SQL Queries and Examples

There may be situation where you want to generate Netezza dynamic SQL queries inside your Netezza NZPLSQL procedures. Or, you may have procedures that generates other procedures or CREATE TABLE or update the records form the table based on some condition. You can also set some session specific variables dynamically inside the stored procedure and execute the queries. For such situations, Netezza NZPLSQL provides the “EXECUTE IMMEDIATE” statement. You can execute the Netezza dynamic SQL queries only in stored procedures. You cannot execute the queries within Netezza block statements. Read:…

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September 9, 2016

Netezza

Netezza NZPLSQL Control Structures: IF, LOOP, WHILE, FOR and EXIT

Netezza NZPLSQL control structures are a useful and important part of the NZPLSQL language. You can use Netezza NZPLSQL control structures to perform some critical decisions based on data and manipulate SQL data in a flexible and powerful way. You can use the Netezza control structures only in procedures. There are two Netezza NZPLSQL control structures: Conditional control and Iterative control Read: Working with Netezza Stored Procedure nzsession command Netezza RECORD Type Variable, Usage and Examples Netezza Conditional Control You can use the IF statement to perform particular task based…

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September 8, 2016

Netezza

nzsession Command: How to Manage Netezza Sessions

A Netezza session represents a single connection to the Netezza appliance. You can use the nzsession command to view and manage the sessions. Session starts when user performs following things: Run nzsql command and session ends when they exit Run nzload command Use nzadmin tool Connect to Netezza system with JDBC, ODBC or OLEDB drivers. The session ends when command completes You must be the system administrator or should have proper permissions to show and manage the sessions and transactions. Read: Commonly used Netezza Basic Commands nzsql command and its…

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September 7, 2016

Netezza

Improve performance with help of Netezza Query Plan

Netezza uses the cost based optimizer to determine the best methods for scan, join order and data movement between the SPUs. Planner uses the Netezza query plan to redistributed or broadcast your data. You can use EXPLAIN VERBOSE <your_quey> command to display the Netezza query plan. The planner always tries to avoid redistributing large tables because of the performance impact. Decisions about redistribution are made by the planner and are based on costs like expected table sizes. Optimizer also uses the Netezza query plan to dynamically rewrite queries to improve…

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September 6, 2016