Re: Counting the number of repeated phrases in a column
| От | Shaozhong SHI |
|---|---|
| Тема | Re: Counting the number of repeated phrases in a column |
| Дата | |
| Msg-id | CA+i5JwYRPVhZcpEJ2r2WQEL7t8tPE_4zVeTckU+gDgnrt_9wyw@mail.gmail.com обсуждение исходный текст |
| Ответ на | Counting the number of repeated phrases in a column (Shaozhong SHI <shishaozhong@gmail.com>) |
| Ответы |
Counting the number of repeated phrases in a column
Re: Counting the number of repeated phrases in a column Re: Counting the number of repeated phrases in a column |
| Список | pgsql-general |
On Tue, 25 Jan 2022 at 17:10, Shaozhong SHI <shishaozhong@gmail.com> wrote:
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 of phrases.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?Regards,David
Hi, All Friends,
Whatever. Can we try to build a regex for 'The City of London London Great London UK ' ?
It could be something like '[\w\s]+[\s-]+[a-z]+[\s-][\s\w]+'. [\s-]+[a-z]+[\s-] is catered for some people think that 'City of London' is 'City-of-London' or 'City-of-London'.
Regards,
David
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