Is the table prebuilt on the $dest DB? Any concerns with encoding? Differing data types? Large amounts of space?
If not, why not something as simple as:
- start transaction on $dest
- Start cursor on $source (select * from source_table)
- delete data on $dest (delete from backup_table)
- insert each row from $source to $dest (get from $source, save to $dest)
- end transaction on $dest
This won't be terribly fast if it is a large table. There may also be better tools for this (export to a CSV, import from CSV, for example, given the right format of the data).
Are there any special constraints on your problem that stop you from using the straightforward solution?
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