Create column based on MAX date in associated table

[pcav]

I have a  data structure where a row in the Table1 has multiple associated rows in Table2. 

Each row in Table2 has a date and time column.

What I want to do is create a date and time column in Table1 with the MAX date and time value for the asssociated rows from Table2

 

 I have tried LASTDATE but it objects to the dates potentially being the same.

Can anybody help as I am struggling with this and have been for ages!!!!

[AlB]

Hi @pcav

I understand you want to show in Table1 the latest date that appears in Table2 for that Id? If so you can create your new calculated column in Table1 as follows:

CalculatedDate =
CALCULATE ( MAX ( Table2[Date] ), FILTER ( Table2, Table2[Id] = Table1[Id] ) )

This assumes no relationships between Table1 and Table2

[pcav]

Thanks but that will not work as there is a relationship between table1 and table2 which is "Id"

[AlB · Accepted solution]

@pcav

It will work anyway. Although in that case the FILTER( ) is redundant.  

[pcav]

Sorry I am being an idiot .... it will works perfectly if I type it in correctly!!!!

I haven't done that much Dax and sometimes stuggle by making things a lot more complicated than they need be.

Thanks very much for taking you time to help me  I very much appreciate it.