RAND function generates a random real number between 0 and 1.
- If the application is reloaded or refreshed, the
RANDfunction is regenerated, resulting in a new set of random values.
- It uses no parameters. Generated values are of Decimal type and have fifteen digits of precision after the decimal point. If you want to see all digits in the generated value, you might need to apply a different number format. See NUMFORMAT Function.
derive value: RAND() as:'random'
Output: For each row, generate a random number between 0 and 1 in the new
There are no arguments for this function.
Example - Random values
In the following example, the source is simply the
source column, and the
random column is generated by the
derive value:RAND() as:'random'
Example - Type check functions
RAND function is typically used to introduce randomness of some kind in your data. In the following example, it is used to perform sampling within your wider dataset.
Tip: Keep in mind that for larger datasets the application displays only a sample of them. This method of randomization is applied when the panel is applied to the full dataset during job execution.
You want to extract a random sample of 20% of your set of orders for further study:
You can use the following transform to generate a random integer from one to 10:
derive value:round(RAND() * 10) as:'random'
You can now use the following transform to keep only the rows that contain random values that are in the top 20%, where the value is
keep row:(random > 8)
NOTE: Since the results are randomized, your results might vary.