问题
I have data from a flat file that I am loading into netezza via nzload.
Some of the field types are numeric however, the data received can sometimes contain invalid characters.
How can i check to make sure that the data isnumeric in my import?
I saw try_cast for T-Sql but didn't see anything similar in netezza.
回答1:
Netezza doesn't have an equivalent to try-cast, you can however test if the value is numeric a few different ways. If you have the SQL Extensions Toolkit installed you can use a regex function.
sql_functions.admin.regexp_like(<Column Name>, '^[+-]?[0-9]*[.]?[0-9]*$')
Otherwise you can use the translate function.
translate(<Column Name>,'0123456789','') in ('','.','-','-.')
来源：https://stackoverflow.com/questions/31546472/netezza-nzload-similar-function-to-isnumeric