* Frank Bax <[EMAIL PROTECTED]> [040615 12:59]: > At 03:14 PM 6/15/04, Tim Johnson wrote: > >We are importing data from 3 CSV files. <..> >the 3 tables into 1. > > > >Taken as a sum, we should have about 330 columns > >and 5000+ rows. Hi Frank: > > Are you saying: > each CSV contains about 110 columns for the same key values Yes.
> - or - > each CSV contains 1700+ rows for the same 330 columns. > - or - > something else? > > In the first case, I would consider loading three tables, then using sql to > "join" the data by key values and dump it into a new table with all 330 > columns. Then delete the three temp tables. :-) > In the second case, I would concatenate the CSV files, then import them > into a table of 330 columns. > > What performance penalty are you expecting with either of these scenarios? I didn't anticipate any penalty myself (for scenario 1), but was looking for a second opinion. I like your tip on using "join". I always like mysql to do the "heavy lifting" (they're so much better programmers than I) Thanks -- Tim Johnson <[EMAIL PROTECTED]> http://www.alaska-internet-solutions.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]