Hi Hank, I think your problem is to find all the files under /uploads by a command like :
cd /uploads ls -lR | grep ".doc" >files.txt then load the files.txt into a temporary table TEMPtable that you create for this issue (see http://dev.mysql.com/doc/mysql/en/load-data.html), after truncating it. When data is loaded, you can then delete by : delete from Your_table where attachement not in (select attachement from TEMPtable); commit; to rewrite a "not in", see http://dev.mysql.com/doc/mysql/en/rewriting-subqueries.html AND look at use of tempfalg at the bottom of the page. Mathias Selon Hank <[EMAIL PROTECTED]>: > I have a table of school class assignments with the following fields - > the first four fields are the primary key: > > Year (int) > Term (enum, "Spring", "Fall","Winter") > ClassID (int) > SectionID (int) > Attachement (varchar 225) > > The "attachment" field is a pointer to a file in the OS of an uploaded > file, in the format like this: > "/uploads/2003/Fall/330/1/conversions.doc" > > When an old class item is imported into a new class item for a new > year/term/class/section (new record), the "attachment" field is copied > over, and the OS file stays where it is.. the attachment field value > is then a pointer the to the OS file for a previous year/term (i.e. > the OS file is not copied to the new location filesystem structure). > > I've been trying to construct a self-joining query to list all the > attachments which are NOT referenced by some future > year/term/class/section. The desired query result is a list of files > I can DELETE - i.e. files not imported or being pointed to by any > other class_item record in a different year/term. > > Keep in mind that pointer to files in the same Year/Term (but > different class/section) are NOT to be deleted. > > The system currently has MySQL version 4.0.1, so I can't use > subqueries (i.e. NOT IN (...)). > > Any suggestions would be greatly appreciated. thanks. > -Hank > > -- > 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]
