Multiple columns updation in single query - sql

Question

Can I update two columns in different tables with single update query.
I stuck in a situation where I have :
Table 1:
case id client id created by
1 a john
2 b Mike
3 c Raghu
4 b Mike
Table 2:
case id client id case cost
2 b 5,000
3 j 10,000
4 b 6,000
The problem is , I want to update client id=d in both the tables of those cases created by Mike.
I can fetch out those cases through join which is created by mike but is it possible to update them also by using sql joins??

Answer 1

The answer to more updates in one statement is no. While you can enter multiple tables in the from clause of an update statement, you can only specify a single table after the update keyword. Even if you do write a "updatable" view (which is simply a view that follows certain restrictions), updates like this will fail.
To fix this
Use transaction block:
Example :
BEGIN TRANSACTION
update A
set A.client_id = 'd'
from table1 A inner join table2 B
on B.client_id = A.client_id
where a.created_by='mike'
update B
set B.client_id = 'd'
from table2 B inner join table1 A
on B.client_id = A.client_id
where a.created_by='mike'
COMMIT

Answer 2

Probably something like this will work
UPDATE table1,table2 SET table1.client_id='d',table2.client_id='d'
WHERE table1.client_id=table2.client_id;
Since you mentioned RDBMS as MSSQL 2012; you can have only single update statement.
You can either have multiple in transaction block as mentioned in another answer (OR)
Create a procedure and wrap both your update statement there like
create procedure update_table1_table2
as
begin
UPDATE table1 SET client_id='d' WHERE client_id='b';
UPDATE table2 SET client_id='d' WHERE client_id='b';
end
Then call your procedure like
exec update_table1_table2