variable in DAX expression

powerbiexpert22 — Tue, 09 Jul 2024 00:08:18 GMT

what standards or best practices we should follow while defining the variables (including variable name) in DAX expression

Re: variable in DAX expression

foodd — Tue, 09 Jul 2024 00:26:30 GMT

Hello powerbiexpert22 , SQLBI covers the topic well in their article titled Variables in DAX, a part of the DAX101 Series.

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Re: variable in DAX expression

Anonymous — Tue, 09 Jul 2024 01:26:55 GMT

Hi powerbiexpert22 ,

There are no standardized rules for defining variable names. Personally, I usually start my variable names with two "_" so I can quickly determine which one is the variable. This also makes it easier to call them quickly.

VAR __variablename = ...

It is also recommended that variable names describe this step as much as possible. Avoid using meaningless characters such as "a", "b", "c", etc. as variable names.

The advantage of variables is that they are calculated only once for each variable (it is important to note here that variables are calculated at the time of definition, not at the time of use), and can be replaced with variables for frequently used parts.

The use of variables after RETURN instead of expressions is useful when checking the results of intermediate steps, and you can always replace the variables after RETURN to check the results.

Hope these help.

Best Regards,
Gao
Community Support Team

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variable in DAX expression

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