Use LIKE Conditions in Oracle

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Q

How To Use LIKE Conditions in Oracle?

✍: FYIcenter.com

A

LIKE condition is also called pattern patch. There 3 main rules on using LIKE condition:

'_' is used in the pattern to match any one character.
'%' is used in the pattern to match any zero or more characters.
ESCAPE clause is used to provide the escape character in the pattern.

The following script provides you some good pattern matching examples:

SELECT CASE WHEN 'FYICenter.com' LIKE '%Center%' 
  THEN 'TRUE' ELSE 'FALSE' END FROM DUAL;
TRUE   

SELECT CASE WHEN 'FYICenter.com' LIKE '%CENTER%' 
  THEN 'TRUE' ELSE 'FALSE' END FROM DUAL;
  -- Case sensitive by default
FALSE

SELECT CASE WHEN 'FYICenter.com' LIKE '%Center_com' 
  THEN 'TRUE' ELSE 'FALSE' END FROM DUAL;
TRUE   

SELECT CASE WHEN '100% correct' LIKE '100\% %' ESCAPE '\' 
  THEN 'TRUE' ELSE 'FALSE' END FROM DUAL;
TRUE

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