Oracle DB查询-数据格式问题

Question

I'm wondering if there is a way to query the oracle db against formatted field value. Example:

I have a table of postcodes stored in the format of "part1 part2". I want to be able to find a postcode either by searching it using the above format or "part1part2" format. What I was thinking is to format the entered postcode by removing the spaces and then query the database like:

SELECT * 
FROM POSTCODES_TBL t 
WHERE t.postcode.**Format(remove spaces)** = 'part1part2'

The Format(remove spaces would convert the postcode from "part1 part2" to "part1part".

My question is, is it possible?

Answer 1

You can use regexp_replace

SELECT * 
FROM POSTCODES_TBL t 
WHERE regexp_replace(t.postcode,'\s', '') = 'part1part2'

This will remove any whitespace (space, tab, newlines etc)

or if you only want to get rid of spaces, replace will work just as well:

SELECT * 
FROM POSTCODES_TBL t 
WHERE replace(t.postcode,' ', '') = 'part1part2'

More details in the manual:

• replace
• regexp_replace

Answer 2

You could use like

SELECT * FROM POSTCODES_TBL t WHERE t.postcode like 'part1%part2'