SQL UPDATE multiple rows at once after SELECT - mysql

Question

My sample table:
+------------+------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+------------+------+-----+---------+-------+
| id | bigint(20) | YES | | NULL | |
| other_id | bigint(20) | YES | | NULL | |
| another_id | bigint(20) | YES | | NULL | |
+------------+------------+------+-----+---------+-------+
+------+----------+------------+
| id | other_id | another_id |
+------+----------+------------+
| 988 | 102 | NULL |
| 989 | 103 | NULL |
| 990 | 104 | NULL |
| 991 | 105 | NULL |
| 992 | 106 | NULL |
| 987 | 101 | NULL |
+------+----------+------------+
How would I SELECT and UPDATE the above table in one query to the effect of doing something like this for every row:
UPDATE
x
SET
another_id = 987
WHERE
id = 987
AND other_id = 101;
UPDATE
x
SET
another_id = 988
WHERE
id = 988
AND other_id = 102
I would hate to run a manual update like this for every row and would like to do it all in one go.

Answer 1

To me it seems that you simply want to set the value of another_id to id:
UPDATE
x
SET
another_id = id
You can provide a range of other_id values in the where clause if you need to restrict the number of rows updated:
UPDATE
x
SET
another_id = id
WHERE other_id IN (...) --list the values you want here.

Answer 2

Shadow is correct on his update statement. It looks like you want to carry all ID directly into the ANOTHER_ID. If you only want this to occur where the "Other_ID" is a given range, just add " where other_id between 101 and 21234" or whatever range you want it to happen for.
To see the results of what Shadow's answer would result in, change it to a simple SELECT statement to see. If it is correct, change to the update version. Example...
Select
ID,
ID AS Another_ID,
Other_ID
from
YourTable
you will get all records showing the two columns showing the ID AS The "Another_ID". It does NOT UPDATE The "Another_ID" column, just queries the value AS the result column name. Again, if you wanted only certain range of numbers, just add
where Other_ID between 101 and 21234
(or whatever value range)
Now, to see as an UPDATE command is exactly as Shadow TRIED to explain..
update YourTable set
AnotherID = ID
and ALL records get updated... If within specific range... use the same where clause as the Select.
If you want to try this without messing up production data, work with a temporary bogus table you can always delete after you are done..
insert into MyTempTable
( ID,
Another_ID,
Other_ID
)
select ID, Another_ID, Other_ID
From YourTable
where ID between 500 and 800
Now you have a test table to play with the insert table and see the impact...