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    Teradata – OLAP Functions

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:0 Comments

    OLAP functions are similar to aggregate functions except that the aggregate functions will return only one value whereas the OLAP function will provide the individual rows in addition to the…

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    Apache Pig – Order By

    • Post author:S K S
    • Post published:August 14, 2021
    • Post category:apache
    • Post comments:0 Comments

    The ORDER BY operator is used to display the contents of a relation in a sorted order based on one or more fields. Syntax Given below is the syntax of the ORDER BY operator.…

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    Teradata – Partitioned Primary Index

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:0 Comments

    Partitioned Primary Index (PPI) is an indexing mechanism that is useful in improving the performance of certain queries. When rows are inserted into a table, they are stored in an…

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    Teradata – JOIN strategies

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:0 Comments

    This chapter discusses the various JOIN strategies available in Teradata. Join Methods Teradata uses different join methods to perform join operations. Some of the commonly used Join methods are −…

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    Teradata – Stored Procedure

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:1 Comment

    A stored procedure contains a set of SQL statements and procedural statements. They may contain only procedural statements. The definition of stored procedure is stored in database and the parameters…

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    Teradata – Macros

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:0 Comments

    Macro is a set of SQL statements which are stored and executed by calling the Macro name. The definition of Macros is stored in Data Dictionary. Users only need EXEC…

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    Mahout – Recommendation

    • Post author:K Z
    • Post published:August 14, 2021
    • Post category:Mahout
    • Post comments:0 Comments

    In this section we will covers the popular machine learning technique called recommendation, its mechanisms, and how to write an application implementing Mahout recommendation. Recommendation Ever wondered how Amazon comes up with…

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    Teradata – Views

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:1 Comment

    Views are database objects that are built by the query. Views can be built using a single table or multiple tables by way of join. Their definition is stored permanently…

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    Teradata – JOIN Index

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:0 Comments

    JOIN INDEX is a materialized view. Its definition is permanently stored and the data is updated whenever the base tables referred in the join index is updated. JOIN INDEX may…

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    Teradata – Hashing Algorithm

    • Post author:S J
    • Post published:August 14, 2021
    • Post category:Teradata
    • Post comments:0 Comments

    A row is assigned to a particular AMP based on the primary index value. Teradata uses hashing algorithm to determine which AMP gets the row. Following is a high level…

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