3

I have data in a table like this:

xxx-xxxxxxx-29
xxx-xxxxxx-87
xxx-xxxxxxxxx-2
xxx-xxx-33

I need to replace every -n at the end with -0n (to add a zero between the dash and the number). Leave -nn as it is.

So, if 2nd character from the right is '-' replace it with '-0'

can this be done using UPDATE?

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2 Answers 2

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3

I need to replace every -n at the end with -0n (to add a zero between the dash and the number).

One option is to use regexp_replace():

update mytable set mycol = regexp_replace(mycol, '-(\d)$', '-0\1');

'-(\d)$' matches on a dash followed by a one digit at the end of the string, and captures the digit; you can then prepend a leading '0'.

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1 Comment

@GMB '-(\d)$' is good one +1. On a large data set, a where condition would be more efficient in performance.
2

Here is one way:

update mytable
set data = substr(data, 1, length(data)-1) || '0' || substr(data,-1)
where data like '%-_';
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