Aw: Counting the number of repeated phrases in a column
От | Karsten Hilbert |
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Тема | Aw: Counting the number of repeated phrases in a column |
Дата | |
Msg-id | trinity-3fcabd90-bbd0-4ea8-862c-289cc034845f-1643131326254@3c-app-gmx-bs05 обсуждение исходный текст |
Ответ на | Counting the number of repeated phrases in a column (Shaozhong SHI <shishaozhong@gmail.com>) |
Ответы |
Re: Counting the number of repeated phrases in a column
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Список | pgsql-general |
> There is a short of a function in the standard Postgres to do the following: > > it is easy to count the number of occurrence of words, but it is rather difficult to count the number of occurrence ofphrases. > > For instance: > > A cell of value: 'Hello World' means 1 occurrence a phrase. > > A cell of value: 'Hello World World Hello' means no occurrence of any repeated phrase. > > But, A cell of value: 'Hello World World Hello Hello World' means 2 occurrences of 'Hello World'. > > 'The City of London, London' also has no occurrences of any repeated phrase. > > Anyone has got such a function to check out the number of occurrence of any repeated phrases? For that to become answerable you may want to define what to do when facing ambiguity. Best, Karsten
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