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  1. spark.apache.org › docs › latestTable-valued Functions (TVF) - Spark 3.5.3 Documentation

    Table-valued Functions (TVF) Description. A table-valued function (TVF) is a function that returns a relation or a set of rows. There are two types of TVFs in Spark SQL: a TVF that can be specified in a FROM clause, e.g. range; a TVF that can be specified in SELECT/LATERAL VIEW clauses, e.g. explode. Supported Table-valued Functions

    • Functions

      Functions. Spark SQL provides two function features to meet...

    • Select

      Specifies the expressions that are used to group the rows....

    • SQL Syntax

      SQL Syntax. Spark SQL is Apache Spark’s module for working...

  2. stackoverflow.com › questions › 34754663Difference between scalar, table-valued, and aggregate ...

    Jan 13, 2016 · 11. A scalar function returns a single value. It might not even be related to tables in your database. A tabled-valued function returns your specified columns for rows in your table meeting your selection criteria. An aggregate-valued function returns a calculation across the rows of a table -- for example summing values.

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  4. books.japila.pl › spark-sql-internals › table-valuedTable-Valued Functions - The Internals of Spark SQL

    Table-Valued Functions. Table-Valued Functions (TFVs) are functions that return a table (as a LogicalPlan) that can be used anywhere that a regular (scalar) table is allowed. Table functions behave similarly to views, but, as functions in general, table functions accept parameters. Table-Valued Functions are represented as ...

  5. www.sqlservertutorial.net › sql-server-user-definedSQL Server Table-Valued Function By Practical Examples

    Executing a table-valued function. To execute a table-valued function, you use it in the FROM clause of the SELECT statement: SELECT. *. FROM. udfProductInYear(2017); Code language: SQL (Structured Query Language) (sql) In this example, we selected the products whose model year is 2017.

  6. www.sqltutorial.net › sql-table-valued-functionsSQL Table-Valued functions - SQL Tutorial

    SQL Table-Valued Function (TVF) is a user-defined function that returns a table as a result set. Unlike scalar functions that return a single value, a TVF can be used to encapsulate a complex logic that generates and returns a table of data. TVFs are particularly useful when you need to perform a set of operations on a dataset and return the ...

  7. techcommunity.microsoft.com › t5 › sql-serverQuery Performance and multi-statement table valued functions

    Jan 15, 2019 · Inline table valued function refers to a TVF where the function body just contains one line of select statement. There is not return variable. Multi-statement table valued function refers to a TVF where it has a return table variable. Inside the function body, there will be statements populating this table variable.

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  9. database.guide › what-is-a-table-valued-functionWhat is a Table-Valued Function in SQL Server? - Database.Guide

    Posted on February 5, 2020 by Ian. In SQL Server, a table-valued function (TVF) is a user-defined function that returns a table. This is in contrast to a scalar function, which returns a single value. You can invoke a table-valued function in the same way that you can query a table. For example, you can use it in a SELECT statement.