I have a data like 1971-12-12 , 10/31/1993 and 11/29/2002 .

[Pranati_Pradhan_6372]

Now how to get  the correct format  1971-12-12 = 1971-12-12

                                                         10/31/1993 = 10-31-1993

                                               and     11/29/2002 = 11-29-2002  in Alteryx .

[caltang]

Two ways you can do so:

[caltang]

The usual pattern if you are using a Multi-field Tool:

DateTimeParse(ToString([_CurrentField_]),"%m/%d/%Y")

Whereas if you use a DateTime tool:

%m/%d/%Y

Hope this helps! 

[caltang]

Ah sorry @Pranati_Pradhan_6372 I just read your title again.

If you have multiple types of dates in your data, you can use a simple Filter tool to achieve a separation of data so that you can apply different techniques on them like so:

[binuacs]

@Pranati_Pradhan_6372 Another method using regex_match function