Question

Here is an example table on which I would like to execute a query:

Structure of table_1
number | photos (CHAR,4)
1234   | 1210

I would like to update value from column photos, but without changing the whole value. I would like change, for example, only third character to “2” without knowing the whole value. How can I do that?

I know I could do that in this way described below, but the problem is the value may be variable and it is a column type CHAR, not INT.

UPDATE table_1 SET photos = (photos + 10) where number='1234'

Answer 1

Yes with mid, left and right functions because photos is a type char:

UPDATE table_1 SET photos = 
 concat(
   left( photos, 2),
   '1',
   right( photos, 1)
 )
 where number='1234'