... Excel / Windows 10 / Office 2016 . You either have to get your users to use Power BI Desktop or to adjust their data models. However, I am just seeing all students/all grades. I'm not sure if it will make things easier in the long run for me or not vs using various Xloopups, Index/Matches, etc but at least trying to start learning it. primary key of my date table is the day, like yours but i use a separate column to associate it by week. Data Model - Relationships aren't working as intended (3 Tables) Hi everyone, I'm working on a simple data structure and wanted to add categories to forms, by adding 2 tables. Primary key fields are necessary in the data model to prevent aggregation errors and duplications. And after adding new columns, your LOOKUP formulas also need to be expanded. It's not a bug. It's just repeating the same total instead of calculating it by the year which is suppose to be dictated by the relationship. I'm getting started trying to understand Data Modeling and Power Pivot more. This thread is locked. Building a PivotTable from the data model rather than a single Excel … However, this week I tried creating a new pivot table, and the relationships were no longer working. The remainder of this article is presented with Excel 2016 for Windows. Add a character to it (on all of the linked tables), and your relationships will start to work. Excel 2013 does not have support for 1:1 relationships (and it does not look like Excel 2016 has this either). The relationships do not seem to be working even though I can clearly see the relationships in the tabular diagram view. @Nick.McDermaid, You're right, 355 is the total of the column. You can follow the question or vote as helpful, but you cannot reply to this thread. In that light, the Excel data model must impose some strict rules around the primary key. Relationships connect two or more tables of data together. Working with big amounts of data often results in a very slow worksheet … You cannot have any duplicates or null values in a field … The tabular engine is quite tolerant of bad data models, but at the end of the day nothing beats a good data model. After creating the relationship, Excel will identify those tables as a Data Model Table, not a Worksheet Table in the dropdowns. I built a robust model in PowerPivot in Excel 2013 using many different relationships, and have created pivot tables before using the model, and relying on those same relationships between my tables. To see what Excel did, click Manage Data Model in the Data Tools group. This is the most common problem when relating tables in Excel, and no website seems to talk about it. Thanks for the quick replies! To connect each table, both tables must have something in common. Every relationship must have a field that you designate as the primary key. Their existence enables us to carry out calculations and analysis across multiples tables of data. The data model provides a way to organize tables and formulas that can be used in a PivotTable. Relationships define the backbone of any data model set up in Excels Power Pivot. Yet columns that you add later, automatically add to the Data Model. Vendor_Key table contains the unique Vendor Numbers of table 1,2 and 3. It uses a common column at the setup. Hi All, I have created this model: The objective is to link Table 1,2 and 3 tables to table 4. So I have one small table with 3/4 columns in a WorkSheet Those are Company Number | Cost Center | Legal Owner | Company Name And I copied that data … The data model comes with Excel 2016+ for Windows, and was formerly available as the Power Pivot add-in. The only table that has unique values is the Vendor_Key table. In Excel, when I drag a student onto a row and then grades into columns, I would expect to see grades for the student. 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