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First day of previous month calculation

I have a date field and I only want to look at the first day of the previous month, how would I obtain that? Would I use a calculation on the date field to get me the first day of the previous month?


  • Hi @grifc5

    If I understand your question correctly, you have a date column with lets say a value "2020-02-19". When you apply this function you would like the value of "2020-01-01". If that's the expectation, please use the below computed column expression. 
    DATETRUNC(DATEADD(@[email protected] , -1, "months"), "months")
    where became_customer is the name of my date column. 

    Please let me know in case of any further questions. 

    Shyam Ayyar
    Product Manager
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