![]() ![]() The example below repros "Basic PIVOT Example" from Using PIVOT and UNPIVOT in SQL Server. An Azure subscription and Azure Data Lake Analytics account is not needed when executed locally. The examples can be executed in Visual Studio with the Azure Data Lake Tools plug-in.It can be a quoted or unquoted identifier: The column alias gives a name to the column that can be used in the remainder of the PIVOT expression to refer to that specific column. The PIVOT expression can refer to column identifiers either by providing the quoted or unquoted identifier of the column, or by prepending the rowset/table alias or rowset variable name to identify the rowset to which the column belongs. Note that the Aggregate_Function_Call cannot contain DISTINCT aggregations. An aggregate function invariant to null values does not consider null values in the group while it is evaluating the aggregate value. The aggregate function should be invariant to null values. ![]() Is a system or user-defined aggregate function that accepts one or more inputs. In these cases, a rowset alias has to be provided and cannot be left out. Follow the links for more details on each. U-SQL also provides the ability to query over nested query expressions, table-valued function calls or querying external rowsets. Optionally, a table alias can be provided for an input rowset variable or table which then can be used in the remainder of the PIVOT expression. The simplest rowset sources are a rowset variable such as that has been defined in a previous statement of the script and a table that has been created in the account's catalog:Ī table can be referenced either with its fully 3-part qualified name, within the current database context with a 2-part name, or within the current database and schema context with a single-part name. The rowset alias gives a name to the rowset that can be used in the remainder of the PIVOT expression to refer to that specific rowset. ![]() SyntaxĪggregate_Function_Call 'FOR' Column_Identifier 'IN' '('Įxpression Column_Alias Īliased rowsets are rowsets that may or may not need a table alias. The syntax for PIVOT provides is simpler and more readable than the syntax that may otherwise be specified in a complex series of SELECT statements. UNPIVOT performs the opposite operation to PIVOT by rotating columns of a rowset expression into column values. PIVOT rotates a rowset expression by turning the unique values from one column in the expression into multiple columns in the output, and performs aggregations where they are required on any remaining column values that are wanted in the final output. You can use the PIVOT and UNPIVOT relational operators to change a rowset expression into another rowset. ![]()
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