Re: using replace function

> On Nov 28, 2019, at 1:09 PM, Antonio Silva <aolinto.lst@gmail.com> wrote:
>
> Hello list
>
> I want to replace a string (not a substring) in a field but making sure that the string in the full field.
>
> In the example below since 'blue' is not the full text in 'blue shark' there should not have a replacement.
>
> How to say "replace only with 'blue' if it is the full string in the field".
>
> With REPLACE I get:
>
> SELECT REPLACE('blue shark','blue','blue fish');
>      replace
> -----------------
>  blue fish shark
> (1 row)
>
> but I would like to get:
>
> SELECT REPLACE('blue shark','blue','blue fish');
>   replace
> ------------
>  blue shark
> (1 row)
>
> Thanks a lot
>
> Antonio Olinto

does this help?
select replace (a.col, ‘value’, ’new value’) where a.col = ‘value’;