duplicate records check
Could any one advise what SQL statement I would need to use, to check a table for any duplicate records e.g that contain the same data within a field. Note that I haven't got the field as a unqiue field. Thanks Neil _ Stay in touch with absent friends - get MSN Messenger http://www.msn.co.uk/messenger -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: duplicate records check
Title: RE: duplicate records check Hi Neil, try something like this SELECT your_field FROM your_table GROUP BY your_field HAVING COUNT(*) 1 Mit freundlichen Grssen Frank Kalis Asset Management ProACTIV___ CiV Versicherungen * PB Versicherungen * PB Pensionsfonds AG Neustrae 62, 40721 Hilden tel +49 (0) 21 03-34 - 7282 fax +49 (0) 21 03-34 - 7098 mailto:[EMAIL PROTECTED] internet: www.proactiv.de -Original Message- From: Neil Tompkins [mailto:[EMAIL PROTECTED]] Sent: Wednesday, July 09, 2003 8:42 AM To: [EMAIL PROTECTED] Subject: duplicate records check Could any one advise what SQL statement I would need to use, to check a table for any duplicate records e.g that contain the same data within a field. Note that I haven't got the field as a unqiue field. Thanks Neil _ Stay in touch with absent friends - get MSN Messenger http://www.msn.co.uk/messenger -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: duplicate records check
Hi Neil, 1) You could ask for the count of each listed item in a column. something like: SELECT item, count(item) from parts GROUP BY item; 2) you could then use SELECT id,item from parts WHERE item = 'xxx'; to review the double entries. This is just a general sample, perhaps if you give more details than we can be more specific. ;-) Best regards Nils Valentin Tokyo/Japan 2003 7 9 15:42Neil Tompkins : Could any one advise what SQL statement I would need to use, to check a table for any duplicate records e.g that contain the same data within a field. Note that I haven't got the field as a unqiue field. Thanks Neil _ Stay in touch with absent friends - get MSN Messenger http://www.msn.co.uk/messenger -- --- Valentin Nils Internet Technology E-Mail: [EMAIL PROTECTED] URL: http://www.knowd.co.jp Personal URL: http://www.knowd.co.jp/staff/nils -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
