When you include a CONTAINS clause in the FROM clause of a query, each match has a score associated with it. The score indicates how close the match is, and you can use score information to sort the data.
Scoring is based on two main criteria:
Number of times a term appears in the indexed row The more times a term appears in an indexed row, the higher its score.
Number of times a term appears in the text index The more times a term appears in a text index, the lower its score. In Sybase Central, you can view how many times a term appears in the text index by viewing the Vocabulary tab for the text index. Click the term column to sort the terms alphabetically. The freq column tells you how many times the term appears in the text index.
Then, depending on the type of full text search, other criteria impact scoring. For example, in proximity searches, the proximity of search terms impacts scoring.
Discuss this page in DocCommentXchange.
|Copyright © 2014, SAP AG or an SAP affiliate company. - SAP Sybase SQL Anywhere 16.0|