On Tue, 25 Jan 2022 at 17:10, Shaozhong SHI <shishaozh...@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
