ABOUT Query

Use the ABOUT operator in English or French to query on a concept. The query string is usually a concept or theme that represents the idea to be searched on. Oracle Text returns the documents that contain the theme.

Word information and theme information are combined into a single index. To enter a theme query, your index must have a theme component which is created by default in English and French.

Enter a theme query using the ABOUT operator inside the query expression. For example, to retrieve all documents that are about politics, write your query as follows:

SELECT SCORE(1), title FROM news 
           WHERE CONTAINS(text, 'about(politics)', 1) > 0
           ORDER BY SCORE(1) DESC;