Merge similar rows into one row with multiple columns

[JLambs20]

Hello!

I have a table with rows of informaiton that need merged into one row.  Each row will have a number with a specific date, however, I need all of those dates for the item to be one row (with separate columns for each date).  There are multiple different numbers in the item column (along with other item-specific columns), but the most important piece are the dates.  Please see the screenshot to see what I need.  So, I just need to turn the first table into the second table. Is this easier done in PowerQuery or DAX? Thank you in advance!

[Jihwan_Kim · Accepted solution]

Second Table =
SUMMARIZECOLUMNS (
Data[item],
"Date1", MAX ( Data[Date1] ),
"Date2", MAX ( Data[Date2] ),
"Date3", MAX ( Data[Date3] )
)

https://www.dropbox.com/s/x6cgrzqxzymc08e/jlambs.pbix?dl=0 

[kza40381]

Hi Kim,

I am extremely new to PowerBI.  Can you please let me know where to place the code you have created in order to create the new table.  I am in transform mode and have the same issue, however, do not understand how to change/adapt it to get your result.