CÓMO
When using string functions such as capitalize or replace in the Calculate Fields tool to replace a lower case letter with an upper case in a string field, only specific letters are replaced. To convert all lower case letters in a string field to upper case, use the .upper() function instead.
In this example, all the lower case letters under the Layer field of the attribute table are converted to upper case.
Follow the steps below to convert all the lower case letters in a string field to upper case with the Calculate Fields tool.
Note: Set the filter to the Text helper type to make the search for the .upper() function easier.
The expression reads as follows:
!<layer name>!.upper()
In this example, the expression reads:
!Layer!.upper()
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