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Netezza Fuzzy String search Functions and Examples

If you ever wondered how to verify how similar or different strings are. The Netezza SQL language supports two Netezza fuzzy string search functions:  Levenshtein Edit Distance and Damerau-Levenshtein Edit Distance. You can perform the fuzzy search with help of these functions. Basically, Netezza fuzzy string search function supports a search in a form of approximate string matching that is based on the defined technique or algorithms. These functions compare two strings to show how similar or different they are. These two fuzzy functions support only VARCHAR or CHAR data…

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November 25, 2016
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Netezza User Defined Functions and Sample Examples

The Netezza user defined functions feature allows you to create custom functions, aggregates, and shared libraries that run on Netezza systems and perform specific types of analysis for your business reporting and data query using those UDFs. The Netezza user defined functions allows you to make use of the Netezza massively parallel processing (MPP) environment to accelerate or speed up your data analysis, as well as to offer new and unique types of analysis on you tera byte of data. Read: Netezza Advance Analytics Functions Netezza String Functions and Examples…

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November 25, 2016
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Netezza Unique Key Constraint and Syntax

Netezza nzsql supports SQL-92 standard. Netezza data warehouse appliance supports referential integrity such as Netezza unique key, primary key, and foreign keys as part of SQL-92 standard requirement. You can create Netezza unique key constraint while creating tables in Netezza database but it will not be enforced while loading Netezza tables. Read: Netezza nzsql command and its Usage Netezza Primary Key Constraint and Syntax Netezza Foreign Key Constraint and Syntax In this post we will learn about the Netezza unique key constraints and its syntax. Netezza Unique Key Constraint Syntax and Example…

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November 19, 2016
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Netezza Foreign Key Constraint and Syntax

Netezza nzsql supports SQL-92 standard. Netezza data warehouse appliance supports referential integrity such as Netezza foreign key, primary key, and unique keys as part of SQL-92 standard requirement. You can create Netezza foreign key constraint while creating tables in Netezza database but it will not be enforced while loading Netezza tables. Read: Netezza nzsql command and its Usage Netezza Unique Key Constraint and Syntax Netezza Primary Key Constraint and Syntax In this post we will learn about the Netezza foreign key constraints and its syntax. Netezza Foreign Key Constraint Syntax and…

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November 19, 2016
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Netezza Primary Key Constraint and Syntax

Netezza nzsql supports SQL-92 standard. Netezza data warehouse appliance supports referential integrity such as Netezza primary key, foreign key, and unique keys as part of SQL-92 standard requirement. You can create Netezza primary key constraint while creating tables in Netezza database but it will not be enforced while loading Netezza tables. Read: Netezza Create Table Command and Examples Netezza Unique Key Constraint and Syntax Netezza Foreign Key Constraint and Syntax In this post we will learn about the Netezza primary key constraints and its syntax. Netezza Primary Key Constraint Syntax…

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November 19, 2016
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Netezza LEFT and RIGHT Functions

If you are migrating to Netezza from other relational databases such as Oracle, SQL Server etc, then you might have noticed Netezza left and right functions are not available. There are other alternatives string functions to Netezza left and right functions, such as you can use the built in SUBSTR function or STRLEFT and STRRIGHT functions that are provided in Netezza SQL Extension tool kit. You have to download and install this SQL extension toolkit explicitly on required database. Netezza strleft Function The strleft() function returns the leftmost n characters…

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November 19, 2016
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Netezza Case Statement and its Usage with Examples

The Netezza CASE statement chooses value from a sequence of conditions, and executes a corresponding statement. The CASE statement evaluates a single expression and compares it against several potential available values, or evaluates multiple Boolean expressions and chooses the first one that is TRUE. Netezza Case Statement Syntax Searched form: CASE WHEN <search-condition-1> THEN <result-1> WHEN <search-condition-2> THEN <result-2> ... WHEN <search-condition-n> THEN <result-n> ELSE <default-result> END Search conditions can be arbitrarily complex and results can be expressions. Value form: CASE <test-value> WHEN <comparand-value-1> THEN <result-1> WHEN <comparand-value-2> THEN <result-2>…

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November 17, 2016
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Netezza group_concat alternative Working Example

If you are trying to concatenate column values after grouping them in Netezza database, you would be searching for Netezza group_concat alternative function. A Netezza group_concat is a UDF provided by the IBM. You have to take that C++ code and compile it on Netezza host to make use of that function. To compile the code you should be either nz user or Netezza admin. You have to compile the source code to new Netezza host in case if you migrate the data from one Netezza server to another. Read:…

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November 15, 2016
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Netezza Create View Syntax and Examples

You can use Netezza create view to create a virtual table based on the result-set of a complex SQL statement that may have multiple table joins. Just like views in other database a Netezza view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. Netezza Views are read-only. The system does not allow you an insert, update, or delete on a view. Read: Netezza Materialized Views and Examples IBM Netezza Create Tables Netezza Alter…

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November 10, 2016
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Netezza Alter Table Command and Examples

You can use the Netezza ALTER TABLE command to change the structure of an existing table. You can add, modify existing columns in Netezza tables. If the table is in use by an active query, the ALTER command waits until that query completes. Read: Netezza CREATE TABLE command and Examples Netezza Data Types Clustered base table in Netezza Netezza Foreign Key Constraint and Syntax Netezza Primary Key Constraint and Syntax Uses of Netezza Alter Table Command The main use of the alter table command is to alter the table structure.…

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November 8, 2016