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