Text analysis with SQL Regex and case sensitivity, implementing ILIKE

229. Regex and case sensitivity, implementing ILIKE

We started learning about regular expressions by reproducing the LIKE operator and all it’s features (wildcards for a single character and for the beginning/end of text).

In this lesson let’s do the same and implement something similar to the ILIKE operator.

How can we achieve case insensitive matching with regular expressions? Here’s a virtual table for you to play with:

WITH strings AS ( SELECT 'foobar' AS string UNION SELECT 'FOOBAR' AS string UNION SELECT 'fooBAR' AS string ) SELECT string FROM strings

Think about it for a couple of minutes...

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-- Type your query here, for example this one -- lists all records from users table: SELECT * FROM users
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