How to convert strings in a table to numbers?
I have a very large table (611507 x 7) where some columns are strings and need to be converted to numbers.
On the other hand, there are repeated strings in the same columns, which should have the same process when they are converted into numbers.How should I do this?
Part of the table data
'longitude' 'user id'
In fact, the column related to
should be converted to a number, and for example, rows 2 and 3, which are duplicates, should be converted in this way: