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It's pretty straightforward to strip out non-alphanumeric characters out from the search term, but how do you compare it to only the non-alphanumeric characters of values in the database?
For example, if I search for stack's, how can I get it to match both stacks and stack's?
What do I need to do to the what-do-i-do variable below to make the above happen?
SELECT * FROM table WHERE <what-do-i-do> ilike 'stacks'
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Using LIKE clause Val LIKE '%[A-Z]%', it ensures that string should contain alphanumeric characters. Val LIKE '%[0-9]%', it ensures that string should contain numeric characters. Lets see the output of T-SQL, you can see it returns only alphanumeric string only.
SELECT * FROM spatial_ref_sys WHERE srtext LIKE '%\ /%'; Sometimes these ticks are very useful for searching special characters in a database.
Answer: To test a string for alphanumeric characters, you could use a combination of the LENGTH function, TRIM function, and TRANSLATE function built into Oracle. The string value that you are testing. This function will return a null value if string1 is alphanumeric.
One way to do this is with translate:
select *
from table
where translate(lower(WhatIDo), translate(lower(WhatIDo), 'abcdefghijklmnopqrstuvwxyz', ''), '') = 'stacks'
The inner translate finds all non-alpha characters. The outer then removes these from the string.
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