Lookup
The Lookup function finds matching data inside a workbook data element, either in the same table, or in an external table.
To understand how to apply the Lookup function without directly using the formula bar, see Add columns through Lookup.
All elements must be on the same data connection.
Syntax
Lookup(formula, local key 1, external key 1, \[local key 2\], \[external key 2\], ...)
This function has the following arguments:
- formula
- Required
- The formula to compute (or the target column to reference) for the row in the target element.
- local key 1
- Required
- The column to use as a join key in the local data element.
- external key 1
- Required
- The column to use as a join key in the target data element.
- local key 2
- Optional
- The additional column to use as a join key in the local data element.
- external key 2
- Optional
- The additional column to use as a join key in the target data element.
Examples
Lookup(\[Customers/Cust Name\], \[Cust Key\], \[Customers/Cust Key\])
Data is inserted into the Sales tableβs [Calc] column from Customer tableβs [Cust Name] column.
These two tables are joined using a single column (join key) from each table. In this case, both join keys are named [Cust Key].
The functionβs formula parameter directly references a column in the joined table.
Note: In formulas, columns from other tables should be referenced with the [table name/] prefix (e.g. [Customers/Cust Name]).
Lookup(\[Customers/Zip Code\], \[Cust Name\], \[Customers/Name\], \[Cust Key\], \[Customers/Cust Key\])
Data is inserted into the Ordered Items tableβs [Calc] column from Customer tableβs [Zip Code] column.
The functionβs formula parameter directly references a column in the joined Customers table.
These two tables are joined using two sets of join keys:
- Order Itemsβ [Cust Name] column is joined with Customerβs [Name] column;
- Order Itemsβ [Cust Key] column is joined with Customerβs [Cust Key] column
Lookup(Sum(\[Sales Amounts/Sales Amount\]), \[Order Number\], \[Sales Amounts/Order Number\])
Data is inserted into the Orders tableβs [Calc] column from Sales Amount tableβs [Sales Amount] column.
The functionβs formula parameter uses the Sum function to aggregate values from the Sales Amount tableβs [Sales Amount] column.
These two tables are joined using a single set of join keys: Ordersβ [Order Number] column is joined with Sales Amountsβ [Order Name] column.
Updated about 2 months ago