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3#
发表于 2013-1-21 21:35:53
What is Oracle Text - continued
Oracle Text can index text
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In the database: VARCHAR2, CLOB, BLOB
In the file system (file names held in the database)
On the web (URLs held in the database
In many languages
• Text can be
• Short strings (product names, descriptions)
• Full sized documents (web pages, emails)
• Plain text, HTML or proprietary formats (.doc, .pdf)
• Text indexes
• Are created using CREATE INDEX…
• Are searched using the CONTAINS clause in SQL
• Are stored in secondary objects (tables) within the database |
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