Just started to search for placeholders and I can see what you are suggesting - thanks. As I understand it (remember I've only read a small amount in the last few minutes) you substitute the ? for the corresponding variable in the statement. In the case above, first ? relates to the $file_obs_datetime_utc and the second ? relates to $file_obs_datetime_local. Does the undef statement above cover all the fields that follow? Just looking to understand fully the code you posted.

In reply to Re^4: Writing NULL values to a MySQL record via DBI by ureco
in thread Writing NULL values to a MySQL record via DBI by ureco

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