MySQL can read fixed-width and de-limited files directly using the LOAD DATA INFILE command. The LOAD DATA INFILE...
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command can be used to read data files located on either the server or the client (with the LOAD DATA LOCAL INFILE syntax), using any delimiters you specify or fixed-width.
The full syntax of LOAD DATA INFILE is available here. This is one example of reading a comma-delimited file:
LOAD DATA INFILE 'data.txt' INTO TABLE tbl_name FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY 'n';
LOAD DATA INFILE is generally quite fast. In my experience, I have seen it load three million rows in roughly ten seconds.
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