在PostgreSQL列中搜索子字符串

Question

I have a DB column that has entries like this:

• "56/45/34"
• "78/34/145"
• "45"
• "" (ie NULL)

I want to search for the rows that match a certain number - for example "45" would should return the first and third rows but not the second.

Answer 1

We can try using a regex approach here with word boundaries:

select col
from your_table
where col ~* '\y45\y';

Demo

Answer 2

You can convert the delimited string to an array and then test the array

select *
from the_table
where '45' = any(string_to_array(the_column, '/'))