Merge pull request #33673 from MicrosoftDocs/revert-33630-250327-regexp-update

Update REGEXP_LIKE() specify compatibilty level

Author: prmerger-automator[bot]

docs/t-sql/functions/regexp-like-transact-sql.md

@@ -29,6 +29,14 @@ REGEXP_LIKE
      )
 ```
 
+**REGEXP_LIKE** requires database compatibility level 170 and above. If the database compatibility level is lower than 170, **REGEXP_LIKE** is not available. Other [regular expression scalar functions](regular-expressions-functions-transact-sql.md) are available at all compatibility levels.
+
+You can check compatibility level in the `sys.databases` view or in database properties. You can change the compatibility level of a database with the following command:
+
+```sql
+ALTER DATABASE [DatabaseName] SET COMPATIBILITY_LEVEL = 170;
+```
+
 ## Arguments
 
 #### *string_expression*