Inhoudsopgave
Wat betekent Unpivot?
Met UNPIVOT kan je kolomgebaseerde gegevens, zoals in een Excel-bestand, omzetten naar rijen, waarmee je de data gemakkelijker kunt verwerken in SQL. In SQL maak je vaak gebruik van waardes die als rijen zijn opgeslagen, maar die je graag als in kolommen zou willen plaatsen.
Wat is query Folding?
Query Folding is de mogelijkheid voor een Power Query query om één query-instructie te genereren om brongegevens op te halen en te transformeren.
What is pivot and UNPIVOT in SQL?
Pivot and Unpivot in SQL Last Updated : 24 Jul, 2019 In SQL, Pivot and Unpivot are relational operators that are used to transform one table into another in order to achieve more simpler view of table. Conventionally we can say that Pivot operator converts the rows data of the table into the column data.
How do I apply the UNPIVOT operator to a specific table?
To apply the UNPIVOT operator to this table, run the following query: The syntax for the UNPIVOT operator is similar to the PIVOT one. In the SELECT statement, you need to specify the columns you want to add to the output table. In the UNPIVOT statement, you will specify two columns:
How to UNPIVOT data in Excel?
Unpivot Excel Data 1 Objective. Before we dig into the mechanics, let’s be sure we are clear about the data formats and our objective. 2 Unpivot. The unpivot command is available without any additional downloads in Excel 2016 for Windows. 3 Get & Transform From Table. The next step is to use the Get & Transform From Table command.
Why does UNPIVOT not reproduce the original result?
UNPIVOT doesn’t reproduce the original table-valued expression result because rows have been merged. Also, null values in the input of UNPIVOT disappear in the output. When the values disappear, it shows that there may have been original null values in the input before the PIVOT operation.