How Can I Efficiently Combine LIKE and IN Conditions in SQL for Text Searching?

Optimizing SQL Text Searches: Combining LIKE and IN Conditions

A frequent SQL challenge involves efficiently combining LIKE and IN conditions for enhanced search capabilities. While a direct combination isn't available, effective alternatives exist.

The Superior Solution: Full-Text Search (FTS)

Database systems like Oracle and SQL Server offer FTS, a powerful tool for optimized text searching. FTS eliminates the need for cumbersome chains of LIKE statements.

Oracle FTS Implementation:

Oracle's FTS utilizes the CONTAINS keyword for efficient searches within full-text indexed columns:

WHERE CONTAINS(t.something, 'bla OR foo OR batz', 1) > 0

SQL Server FTS Implementation:

Similarly, SQL Server employs CONTAINS for text searches:

WHERE CONTAINS(t.something, '"bla*" OR "foo*" OR "batz*"')

Key Considerations and Prerequisites:

• Full-Text Index: The target column must possess a full-text index for FTS to function effectively.
• FTS Optimization: FTS inherently optimizes searches by accounting for word stemming and stop words.

Further Reading:

• Oracle Text Documentation: https://www.php.cn/link/bfb26b513b7a640448c79c3bdd6d2bb0
• Microsoft SQL Server Full-Text Index Documentation: https://www.php.cn/link/32f84b597629f37d9ef53d714fce6fa1

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