How do I export a large table into 50 smaller csv files of 100,000 records each

Posted by Eddie on Stack Overflow See other posts from Stack Overflow or by Eddie
Published on 2010-05-13T11:21:37Z Indexed on 2010/05/13 11:34 UTC
Read the original article Hit count: 550

Filed under:
|
|
|

I am trying to export one field from a very large table - containing 5,000,000 records, for example - into a csv list - but not all together, rather, 100,000 records into each .csv file created - without duplication. How can I do this, please?

I tried

SELECT field_name
  FROM table_name
 WHERE certain_conditions_are_met
  INTO OUTFILE /tmp/name_of_export_file_for_first_100000_records.csv
        LINES TERMINATED BY '\n'
 LIMIT 0 , 100000

that gives the first 100000 records, but nothing I do has the other 4,900,000 records exported into 49 other files - and how do I specify the other 49 filenames?

for example, I tried the following, but the SQL syntax is wrong:

SELECT field_name
  FROM table_name
 WHERE certain_conditions_are_met
  INTO OUTFILE /home/user/Eddie/name_of_export_file_for_first_100000_records.csv
        LINES TERMINATED BY '\n'
 LIMIT 0 , 100000
  INTO OUTFILE /home/user/Eddie/name_of_export_file_for_second_100000_records.csv
        LINES TERMINATED BY '\n'
 LIMIT 100001 , 200000

and that did not create the second file...

what am I doing wrong, please, and is there a better way to do this? Should the LIMIT 0 , 100000 be put Before the first INTO OUTFILE statement, and then repeat the entire command from SELECT for the second 100,000 records, etc?

Thanks for any help.

Eddie

© Stack Overflow or respective owner

Related posts about mysql

Related posts about export