How to replace a column value using PowerQuery editor - powerbi

Question

I'm relatively new to Power Query. I'm looking for the best way to replace a column's value as below.
The column has date values in a mixed format such as below.
09/16/2022
09/20/2022
09/26/2022
09/30/2022
10-01-2022
10-03-2022
10-05-2022
I'm looking to standardize and make the format generic as below.
09-16-2022
09-20-2022
09-26-2022
09-30-2022
10-01-2022
10-03-2022
10-05-2022
It seems one of the ways to implement this is to use Advanced Editor and build M queries to implement the replacement, functions like Table.TransformColumns and Text.Replace.
'can't figure out the exact code to be used with this or if there is a better way.
Looking for suggestions. Thanks.

Answer 1

If you're a beginner, let the UI write this code for you. Highlight the column by clicking the column header, go to Transform on the ribbon and click Replace Values. Replace "-" with "/" and click OK.
Finally right click the column header again, click Change Type and then select Date.

Answer 2

In M code you could use:
Table.TransformColumns(#"Previous Step",{{"Column Name", each Text.Replace(_,"/","-")}})
As an example:
let
//create sample table
Source = Table.FromColumns(
{{"09/16/2022",
"09/20/2022",
"09/26/2022",
"09/30/2022",
"10-01-2022",
"10-03-2022",
"10-05-2022"}},
type table[dates=text]),
//replace "/" with "-"
Normalize = Table.TransformColumns(Source,{{"dates", each Text.Replace(_,"/","-"), type text}})
in
Normalize
Source
Results
Notes:
Original data is dates as text strings
Final data is also dates as text strings
To convert the strings to dates, you could use, instead, something like: Table.TransformColumns(Source,{{"dates", each Date.From(_, "en-US"), type date}}) but the separator would be in accord with your Windows Regional date settings.