Question

I have 123 456 789 and i don’t know how i can replace with this values 999 888 777.
I want to avoid an update query for each case, because i have many values to replace.

 table_A
 id 
 123
 456
 789
 ...

---

table_A
id
999
888
777
...

I need an alternative to this type of query.

UPDATE table_A
SET id=999
WHERE id=123

Answer 1

You can do it using CASE, like this:

UPDATE table_A
SET id = CASE
    WHEN id = 123 THEN 999
    WHEN id = 456 THEN 888
    WHEN id = 789 THEN 777
END