One of the most common operations with strings is to make the string capitalized: uppercase its first letter, and leave the rest of the string as-is.
The best way to do this is through a combination of two functions. One uppercases the first letter (upper function), and the second slices the string and returns it starting from the second character (function cut, drop).
yourTable:update `${(upper x[0]),x[1]} each {0 1_string x} each yourColumn from yourTable;
An example of use is the following code where we are generating one hundred of dummy lines. Note that we are using a symbol column and we convert the symbols to strings in the process.
yourTable:([]x:100?.z.t;sym:`column);
yourTable:update `${(upper x[0]),x[1]} each {0 1_string x} each sym from yourTable;
We get this result.