Marvin Posted December 8, 2018 Share Posted December 8, 2018 (edited) Chapter 7: Advanced SQL and MySQL - Fifth Edition of PHP and MySQL for Dynamic Web Sites Visual QuickPro Guide Page 229 - Table 7.3 It says Quote Operator - ~ Meaning - Lowers a ranking if present Operator: < Meaning: Decrease a word's importance I don't understand the difference between lowering importance and lowering ranking. Doesn't decreasing the importance decrease the ranking? Can someone please explain to me the difference between the 2? Thanks, Varun Edited December 8, 2018 by Marvin Changed Title to make 'versus' more obvious Link to comment Share on other sites More sharing options...
Larry Posted December 10, 2018 Share Posted December 10, 2018 Sorry for the confusion here. It's a subtle difference. Here's what the MySQL manual says: Quote These two operators are used to change a word's contribution to the relevance value that is assigned to a row. The > operator increases the contribution and the < operator decreases it. and Quote A leading tilde acts as a negation operator, causing the word's contribution to the row's relevance to be negative. This is useful for marking “noise” words. A row containing such a word is rated lower than others, but is not excluded altogether, as it would be with the- operator. I guess I'd phrase it as ~ being more impactful than <. Link to comment Share on other sites More sharing options...
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