interesting SQL puzzle - concatenating column with itself.
От | Nick Fankhauser |
---|---|
Тема | interesting SQL puzzle - concatenating column with itself. |
Дата | |
Msg-id | 427E60BC.8060701@ontko.com обсуждение исходный текст |
Ответы |
Re: interesting SQL puzzle - concatenating column with itself.
Re: interesting SQL puzzle - concatenating column with itself. |
Список | pgsql-sql |
Hi- I'm doing a conversion from an older database in which a memo field was handled by storing one line per record and thendisplaying the related records in order. I want to compress all of the lines into a single text field with one recordper memo entry. So for instance, the old database looks like this: memo_id | sequence | memo_text --------------------------------------- 666 | 1 | The quick 666 | 2 | red fox 666 | 3 | jumped over 666 | 4 | the lazy brown dog And my goal is to transform each group of lines into a single record that looks like this: memo_id | memo_text ---------------------------------------------------------- 666 | The quick red fox jumped over the lazy brown dog Any thoughts on how to do this via sql? I could write a little program to do it, but it seems like there must be a pure-SQLsolution that I'm not seeing. Thanks -Nick -- ------------------------------------------------------------------ Nick Fankhauser nickf@ontko.com Phone 765.935.4283 Fax 765.962.9788 Ray Ontko & Co. - Software Consulting Services http://www.ontko.com
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