Netezza Archives - Page 11 of 17

Netezza Create Table Command and Examples

Use the Netezza CREATE TABLE command to create a new, initially empty table in the current database. The CREATE TABLE command automatically creates a data type that represents the tuple type (structure type) corresponding to one row of the table. Netezza Create Table Command Syntax CREATE [ TEMPORARY | TEMP ] TABLE <table> ( <col> <type> [<col_constraint>][,<col> <type> [<col_constraint>]…] [<table_constraint>[,<table_constraint>… ] ) [ DISTRIBUTE ON { RANDOM | [HASH] (<col>[,<col>…]) } ] [ ORGANIZE ON { (<col>) | NONE } ] [ ROW SECURITY ] Read: Importance of right Distribution…

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November 8, 2016

Netezza

nzhealthcheck Command to identify Netezza Health Check

You can perform the Netezza health check by running nzhealthcheck command. The Netezza health check is a report on how well the system is performing. Read: Netezza Architecture nzhealthcheck Command to identify Netezza Health Check To perform Netezza health check you have to login as an nz user and run command: nzhealthcheck You don’t have to pass any parameter to the above command. The output of the command presents general system information in the section MINI SYSINFO and information about the issues found in the section Failures. You can easily identify the information…

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November 7, 2016

Netezza

Basic Netezza Linux Commands to Learn Netezza

In this post you will learn about some basic Netezza Linux commands. As you know, Netezza is Linux based data warehouse appliance that doesn’t have any UI. To get started you need to know some basic Netezza Linux commands to move through the Linux directories, find files, find directory size, create folders, create folders, and use some standard file editor to create file. Read: Commonly used Netezza Basic Commands Basic Netezza Linux Commands Here are the quick and lists of basic Netezza Linux commands that are frequently used when working…

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November 2, 2016

Netezza

Commonly used Netezza Basic Commands

In this post you will learn about some commonly day to day Netezza basic commands. There are lot of Netezza basic commands available along with Netezza commonly used utilities that are used but here are listed some commonly used commands. Read: Netezza Commonly used Utilities Basic Netezza Linux Commands to Learn Netezza nzrev Command Check the Netezza build version [nz@netezza01 ~]$ nzrev Release 7.2.1.0 [Build 46322] [nz@netezza01 ~]$ nzstats Command Provide the statistics about the Netezza appliance [nz@netezza01 ~]$ nzstats Field Name Value -------------------- -------------------------------------------- Name netezza 01 Description <sys…

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November 1, 2016

Netezza

Netezza Failover – High Availability Architecture

Netezza appliance include necessary components to function seamlessly in the event of any hardware issue so that its availability is more that 99.99%. This is called Netezza high availability architecture that perform seamlessly in case of Netezza failover. There are two host in a cluster in all Netezza appliances so that if one fails other once can take over the task that is being carried out. Netezza Failover - High Availability Architecture Overview Netezza appliance uses the Linux-HA (high availability) and Distributed Replicated Block Device (DRBD) for the host cluster…

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October 31, 2016

Netezza

Netezza Backup and Restore: Best Practices

In this post you will learn about Netezza backup and restore data. It provides general information on backup and restore methods available with Netezza system. Netezza Backup and Restore Overview Netezza provides several backup and restore methods as per the different requirements. You can take table or database backup whenever required: You can create full and incremental backups of your various Netezza databases in compressed internal using the nzbackup command and restore them to a Netezza system whenever required using nzrestore command. As a best practice create script that perform…

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October 25, 2016

Netezza

Netezza Pad Zero with Working Example

Netezza pad zero functions are string functions used to remove or add the string to beginning or end of the expression. An expression could be column values. There are two pad functions available in Netezza; LPAD and RPAD string functions. You can use those function in Netezza pad zero or any other character provided in arguments: Read: Netezza String Functions and Usage Different types of Netezza Trim Functions and Examples Netezza Date Functions and Examples nzsql Command and its Usage Netezza LPAD function You can use this function to pad string…

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October 24, 2016

Netezza

Netezza Export Table Data to CSV format

You can export the Netezza table in many ways. Netezza export table is done using either Netezza external table or Netezza nzsql commands. Use of Netezza external table is fastest way to export Netezza table data compared to a Netezza nzsql command. Netezza nzsql with option -o is easy method compared to creating Netezza external tables. Netezza Export Table using Netezza External Tables You can use the Netezza transient external table to export the data table to flat file (CSV format). This feature is very handy if you are exporting…

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October 21, 2016

Netezza

Netezza MERGE command to Manipulate Records from Table

Use the Netezza MERGE command to insert, update, or delete rows in a target table using data from a source such as a table, view, or sub-query and based on rules specified for a matching condition in the merge statements. In the Netezza merge command, you must specify at least one matching_condition statement to identify the rows that you want to update, insert or delete. This feature is not supported in all versions of Netezza. IBM has introduced this feature in Netezza 7.2.1 or higher. MEGRE command is used to…

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October 20, 2016

Netezza

Netezza Temporary Tables and Examples

Like any other database, Netezza also supports temp or temporary tables. There are three types of Netezza temporary tables; all of them have advantage over traditional temporary tables. Netezza Temporary Tables Netezza temporary tables are local to the user session. You can use temporary table repeatedly within a user session for multiple times. Like derived tables, temporary tables also use Netezza swap partition space. You can drop and recreate the temporary table within the user session. However, these temporary tables are not visible outside the user session. You do not…

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October 19, 2016