选择1个表，更新另一个表

Question

I'm trying to update users within a table, that have rank 3 in another table. Here's an example:

t1:

id   respect   activity_points
1    10        1200
2    10        700
3    10        90

t2:

id   rank
1    3
2    1
3    1

---

I'm trying to update 'respect' in table1 where rank is equal to 2 or above, from table2.

Thanks in advance :)

Answer 1

I think you are looking for the SQL answer not PHP and assuming that t2.id is id that maps to the id in t1

update t1 
inner join t2 on t1.id = t2.id
set t1.respect = (t1.respect + 5) 
where t2.rank >= 2

Answer 2

Query : update t1 set respect=newvalue where id 
        in ( select id from t2 where rank > 2 )

Answer 3

UPDATE t1 SET respect = 'your value' WHERE id in (
    SELECT id FROM t2 WHERE rank >= 2
)

or

UPDATE t1 SET respect = 'your value' WHERE id = (
    SELECT id FROM t2 WHERE rank >= 2
)