The Definitive Guide to Data Quality
This component reflects only the capabilities of the MySQL function bulk load, nothing else. You can use this bulk load but I would never try to write into a table with existing data. Bulk load has also a very weak error handling, you have to check log files and even the content in the table.
I suggest loading you data into a staging table with the replace records option and move these data with SQL methods into your target tables.
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