Try to refresh the extract, and it will refresh.Connect live to your data, whatever it is.Tableau puts the extract of the static data in the. Connect live to a file-based data source, like an Excel file.Try to refresh the data, nothing happens. ![]() Tableau stores a copy of the data in the. Connect live to a file-based data source, like an Excel file.There’s a wrinkle in the above that some users run into: tds files is that they “wrap” any of the above connection types in metadata to make the connections re-usable, so instead of making the connection to the raw Excel file, SQL Server, Tableau Saved Data Source, etc. A connection to a Tableau Server Published Data Source – this has four subtypes, the first are variations of three types mentioned above – a passthrough live connection to the data source, an extract made from a live connection, or a naked extract, and the fourth is a “static” connection to the data source (which is what we get from a live connection to a data source when we leave the “Include External Files” option to it’s default of being checked, or make a connection to a static source where we Include External Files, there’s a failure mode in this that I’ll talk about further down in publishing).Īn aside here: One way to think of.tds instead (a bit more about that below). tde changes that can case workbooks built on the naked extract to start throwing up errors, showing instead of your actual field names, etc. I don’t really recommend this unless you are very sure of what you’re doing, if the. tde doesn’t have the information needed us to trigger a refresh. This gets a single-cylinder icon and is a variation on the live connection, only it’s really a static connection because the raw. A “naked” extract – we can directly connect to a.An extract that is made from a live connection to the data source.twbx, created by saving a workbook with a live connection as a. When it comes to data connections, I have several classifications that I keep in mind. twbx, for example cube sources), which effectively makes the data source static. twbx (not all data sources can be saved inside a. twbx, if there’s a live connection then Tableau will attempt to save that data source inside the. twb has the connection info but not the data, so all the data lives separately. Whatever way we do things, the workbook (the XML) also includes the connection information back to the live data source so the extract can be refreshed. If we connect live then in the Data window right-click on the data source and choose Extract Data…, the extract is saved inside the.If we use the “Import all data” / “Import some data” options when we make the connection, Tableau will prompt us to save the extract as a file.twb (or haven’t saved a workbook yet), Tableau will prompt us to save the extract as a file. When we’re extracting data, there are a few different scenarios depending on whether the Tableau workbook is a. twb and the data) into the user’s temp folder (the location depends on the OS and the user’s profile) and then works with that in place. ![]() ![]() twb file in Tableau Desktop, Tableau reads the connection information and connects to the data source(s). I know this is possible, I’ve never seen one actually used in practice. twb and all data sources (not all data sources can be exported into a. This is a zip file (with a different extension) that stores the. twb, only stored as a separate file so it’s re-usable. This is an XML file that has the connection information, calculated fields, color assignments, etc. tde – A Tableau Data Extract that has the data from a data source stored in a columnar, highly compressed format. This is an XML file containing the metadata for a Tableau workbook that includes information about the connections to the data source(s), what worksheets and dashboards are in the workbook, calculated fields created in Tableau, default color assignments, Tableau parameters, etc. Here are the major types of Tableau files that we work with in Desktop: twb vs.twbx, and then get into some details on different types of connections and what happens based on different orders of operations, and toss in a gratuitous Buffy reference. There are some subtle behaviors and idiosyncracies in working with data connections, Tableau data extracts, and Tableau Server that aren’t fully fleshed out in the documentation, here’s my attempt! I start out with a review of the common file types and. This was yesterday’s contribution to a Tableau forums discussion on data extracts, I thought it deserved a separate post that I could keep updated.
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