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Oracle Text normalizes the word or phrase before performing lookup in the index. You can use the ABOUT operator with the CONTAINS and CATSEARCH SQL operators. In the case of CATSEARCH, you must use query templating with the CONTEXT grammar to query on the indexed themes. See ABOUT Query with CATSEARCH in the Examples section
- Oracle Text Indexing Elements
For formatted documents, Oracle Text stores documents in...
- Searching Document Sections in Oracle Text
Oracle Text returns all documents that contain your query...
- Managing Tables
Managing tables includes tasks such as creating tables,...
- Working With Context and Ctxcat Grammars in Oracle Text
With CONTAINS, you can also use the CTXCAT grammar with the...
- contains Function
The contains function indicates whether or not a search...
- Oracle Text Indexing Elements
3 gru 2013 · CONTAINS lets you search against columns that have been indexed with an Oracle*Text full-text index. Because these columns are full-text indexed, you can efficiently query them to search for words and phrases anywhere with the text columns without triggering a full table scan.
The contains function indicates whether or not a search string is present inside the source string. Syntax. returnvalue contains(source, search_string) source ::= any* search_string ::= any* returnvalue ::= boolean. Semantics. source. The input string to be searched. This argument is implicitly cast to a sequence of strings. search_string.
To determine if a particular string is contained anywhere in a text variable or text constant, you can use the following syntax with the Contains function: Contains(<text value>, <text substring>) <text value> contains <text substring>
10 sty 2019 · select * from my_table mt where contains(my.my_blob, '%{some}%', 1) > 0; So, if I want to search "text" using same query (1), I got a result, but if I search "some" I don't get any result using queries (1) and (2).
2 mar 2022 · Why does the Oracle Text CONTAINS query operator not return any results when a wildcard is applied on a stopword? Example: (Those sample values assume that an english stoplist is used - that depends on the DB language. If you use a different DB language, just replace "are" and "there" with stopwords from your language.)
A function consists of a header and body. The function header has the function name and a RETURN clause that specifies the datatype of the returned value. Each parameter of the function can be either in the IN, OUT, or INOUT mode. For more information on the parameter mode, check it out the PL/SQL procedure tutorial.
