The full-text search technique makes the use of the entities of databases called documents that have textual data in them, such as the name of customers, items, descriptions, and then search based on keywords.The execution of the above query statement gives the following output with 0 as return position, which means that the word with value “well” was not found in the original string “170, Mountain Villa, Prince Edward Parade, Cross Road, Hunters Hill”. SELECT CHARINDEX('well', '170, Mountain Villa, Prince Edward Parade, Cross Road, Hunters Hill') Let us now search for some other string in the same original string, say “well” using the CHARINDEX function and observe the output of the following query. Further, PATINDEX, CHARINDEX functions help us retrieve the string’s position that we are trying to search in other strings or character-based columns and returns the index if the string found successfully. We can use the LIKE function to search for the words that begin with, end with, or contain certain characters that we have specified. Text Search Using PATINDEX, CHARINDEX and LIKE Functions In this article, we will see about the working of text search using LIKE function and full-text search and see how we can define full-text search in SQL with the help of example wherever possible. In SQL, the full-text search facility is provided to search for the matching text in one or more column data. The full-text search is most often used by search engines such as Google or bing and also in blog post searching, e-commerce site search, etc. Full-text is the searching facility that allows the users to search for certain keys that are not even mentioned perfectly and help in retrieving the searched filtered data in a fast and easy way. Text Search in SQL can be done using the functions available in SQL: PATINDEX, CHARINDEX and LIKE.
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