Question

TABLE 1 is like following

A  B
1  x
2  y
3  z
4  t

TABLE 2 is like following

A2 B2
1  k
2  l
3  m
4  n

I want to update Table2.B2 rows 2 and 3 with the values Table1.B rows 2 and 3

so the resulting Table 2 would be

A2 B2
1  k
2  y
3  z
4  n

Answer 1

UPDATE table1, table2 
SET table2.b2= table1.b 
WHERE table1.a= table2.a2 
AND table2.a2 IN (2, 3);

Updated

UPDATE `table1`, `table2` 
SET `table2`.`b2`= `table1`.`b` 
WHERE (`table2`.`a2`- 4)= `table1`.`a` 
AND `table2`.`a2`> 4 
AND `table2`.`a2`< 9 ;