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*Monitor local performance as you utilize Custom SQL in Tableau Desktop. It seems daunting at first because it requires learning a new language and syntax, but if you understand how Tableau calculations work, you are halfway to knowing SQL already! One of the best things about SQL is how flexible it is! You can even pair WHERE and GROUP BY clauses together if you want to limit rows and aggregate. We used the Sum function to aggregate credits and then grouped at the Student/Year level. The theoretical table above might contain 30 columns, but we ignored all the ones we didn’t need. Let’s look at a simple way that we could write a SQL statement to solve for the first bullet point listed above. Once you have established a connection to your 1010data data source, you can specify a 1010data Macro Language query using a custom SQL query in Tableau. Rolling baseball data up from a pitch-by-pitch level to an “at-bat” level summary.restaurant sales) up from an item-by-item level to a receipt-level summary. The table was at a quarterly level and I used GROUP BY to roll it up to a yearly level. Calculating number of college credits earned by student per year.Here are some examples where I’ve used GROUP BY: It allows you to aggregate some fields and group by others. If you’ve used Tableau Prep, GROUP BY is similar to the Aggregate tool. Utilizing this process will ensure the inactive rows get filtered at the database level, not the Tableau layer on your local computer.Īnother method you can utilize to reduce row count is the GROUP BY expression.