Matched tables would then be displayed in the “Include Tables” window as shown below.
“Worksheet Filter” can be added further just to limit only those matches where an excel sheet name will match the keyword, thereby ignoring any other sheets or files. Users can add multiple filters and find the target files. Users can add a custom field or filter to select desired files, such as include subfolders, file name matches (or does not match) a keyword or filetype, file size range, date created, date modified etc. As shown in the screenshot below, click on the “Tables” tab and choose “Union multiple tables” - Instructor Unions are a method of combining data together from similarly-structured data.
#Tableau prep wildcard union how to
How to Achieve using this New Feature:Īfter opening Tableau Prep, from the default window click “Connect to Data”.Ĭhoose the file type to connect and browse to the appropriate folder and select the target file. The table that contains all possible values in the linking field should be the leftmost table in the join, when the join type is Left Outer Join. Enter the search criteria that you want Tableau to use to find tables to include in the union.
Click Wildcard (automatic) in the Union dialog box. With the recent release of Tableau Prep, it is now possible to bring various files from a directory using a wildcard union feature. Tableau Desktop Resolution Option 1 Add matching values to the linking fields in both tables in the data source. To union tables using wildcard search On the data source page, double-click New Union to set up the union.
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