Teradata: Best way to search items using wildcard

Question

I'm trying to search items using where clause like this:

SELECT *
FROM TABLE
WHERE ITEMID LIKE '%[0-9][abc][0-9]%'

What I am trying to achieve is to retrieve data having itemID with alphabets of only 'a' , 'b' , or 'c' , starting and ending with number in the middle of alphanumerical value.

For instance, '337Z112' shouldn't be retrieved because it is not 'a' , 'b' , or 'c' .

Other example is 'edcb9a9b' which should be retrieved because it contains '9a9' .

Thanks in advance!

Answer 1

In Teradata, you would need to use REGEXP_SIMILAR() to compare agains a regular expression:

SELECT *
FROM mytable
WHERE RegExp_Similar(itemid, '.*\d[abc]\d.*', 'i') = 1;

NB : \\d is a shortcut for [0-9] (the digits character class)