The CONTEXT Grammar

The CONTEXT grammar is the default grammar for CONTAINS. With this grammar, you can add complexity to your searches with operators. You use the query operators in your query expression. For example, the AND logical operator enables you to search for all documents that contain two different words. The ABOUT operator enables you to search on concepts.

You can also use the WITHIN operator for section searches; the NEAR operator for proximity searches; and the stem, fuzzy, and thesaurus operators for expanding a query expression.

With CONTAINS, you can also use the CTXCAT grammar with the query template feature.

The following sections describe some of the Oracle Text operators:

• ABOUT Query

• Logical Operators

• Section Searching and HTML and XML

• Proximity Queries with NEAR, NEAR_ACCUM, and NEAR2 Operators

• Fuzzy, Stem, Soundex, Wildcard and Thesaurus Expansion Operators

• Using CTXCAT Grammar

• Stored Query Expressions

• Calling PL/SQL Functions in CONTAINS

• Optimizing for Response Time

• Counting Hits

• Using DEFINESCORE and DEFINEMERGE for User-defined Scoring See Also: Oracle Text Reference for complete information about using query operators