问题
In MS SQL Full-text search, I'm using ISABOUT in my queries.
For example, this should return the top 10 ProductIDs (PK) with a RANK Field in the ProductDetails Table
SELECT *
FROM CONTAINSTABLE( ProductDetails, *, ISABOUT("Nikon" WEIGHT (1.0), "Cameras" Weight(0.9)), 10 )
However, according to the SQL Documentation ISABOUT is deprecated.
So, I have two questions:
- What is
ISABOUTbeing replaced with? - DO I even NEED any extra
SQL Commandthere? ( IOW, would just putting the search phrase 'Nikon Cameras' be better? )
What I was originally trying to accomplish here was to weight the first word the highest, then the second word lower, and keep descending to 0.5 where I would just rank the remaining words at 0.5.
My logic ( and perhaps it's flawed ) was that people's most relevant search words usually happen near the beginning of a phrase ( in English ).
- Am I going about this the wrong way?
- Is there a better way?
- Am I asking too many questions? (^_^)
Thanks all for your time...
回答1:
Your link above refers to Enterprise Search, but for SQL Server full-text search, ISABOUT is still supported as part of the CONTAINS predicate and CONTAINSTABLE function.
This question was also covered in a post to the MSDN SQL Server Search forum.
回答2:
ISABOUT adds custom weights to your words which help in ranking the documents returned. For CONTAINS(), it does not do any ranking, this form has no influence.
来源：https://stackoverflow.com/questions/2581014/what-should-the-sql-keyword-isabout-deprecated-be-replaced-with