Need to set main.account = sub.account where main.id = sub.id - sql

Question

This is my query, I need to write an update that will set mabi accountid = mb glinventory for each of the outputs that this select statement gives. This is what my select statement pulls
mabi.itemid
mabi.accountid
mb.glinventory
mb.itemid
758711763075273754
0
735174926379018147
758711763075273754
758711763074225163
0
735174926320297568
758711763074225163
758711763075273753
0
735174926379018147
758711763075273753
758711763074225169
0
735174926320297568
758711763074225169
758711763075273749
0
735174926320297568
758711763075273749
758711763074225162
0
735174926379018147
758711763074225162
Basically, I need to set the mabi accountid = mb glinventory for the rows in my output if that makes sense
SELECT
mabi.businessactionitemid,
mabi.accountid,
mb.glinventory,
mb.businessactionitemid
FROM
mabusinessactionitem mabi
INNER JOIN (
SELECT
mabi.accountid,
cat.glinventory,
mabi.businessactionitemid
FROM
cocategory cat
INNER JOIN mabusinessactionitem mabi ON cat.categoryid = mabi.categoryid
WHERE
cat.categoryid = mabi.categoryid
AND mabi.businessactionitemid IN (
SELECT
businessactionitemid
FROM
mabusinessactionitem mabi
INNER JOIN mabusinessaction maba ON maba.businessactionid = mabi.businessactionid
WHERE
documentnumber = '32103'
AND STATUS != 1
AND accountid = 0
)
) mb ON mb.businessactionitemid = mabi.businessactionitemid;
This is the select statement that pulls those outputs, I need to write an update to do what I described above. Im not sure of the best way to do it, I have tried
UPDATE mabi
SET mabi.accountid = mb.glinventory
FROM mabusinessactionitem mabi
JOIN (
SELECT mabi.accountid,
cat.glinventory,
mabi.businessactionitemid
FROM cocategory cat
INNER JOIN mabusinessactionitem mabi ON cat.categoryid = mabi.categoryid
WHERE cat.categoryid = mabi.categoryid
AND mabi.businessactionitemid IN (
SELECT businessactionitemid
FROM mabusinessactionitem mabi
INNER JOIN mabusinessaction maba ON maba.businessactionid = mabi.businessactionid
WHERE documentnumber = '32103'
AND STATUS != 1
AND accountid = 0
)
) mb ON mb.businessactionitemid = mabi.businessactionitemid;
I've done things similar, is this the right route, how would I complete this task. I effectively need to do
UPDATE mabi
SET mabi.accountid = mb.glinventory
WHERE mabi.itemid = mb.itemid

Answer 1

Your approach is actually correct. Just to combine it all together like this will do
UPDATE mabi
SET mabi.accountid = mb.glinventory
FROM mabi
JOIN mb
ON mabi.itemid = mb.itemid
If you need to check and filter by mabi.accountid, you can add a WHERE condition at the back. Like where mabi.accountid = 0

Answer 2

You are almost there, by the looks. You just need to join mabi and MB together:
UPDATE
mabi
SET
mabi.accountid = mb.glinventory
FROM
mabusinessactionitem mabi
INNER JOIN
(
SELECT
mabi.accountid,
cat.glinventory,
mabi.businessactionitemid
FROM
cocategory cat
INNER JOIN mabusinessactionitem mabi ON cat.categoryid = mabi.categoryid
WHERE
cat.categoryid = mabi.categoryid
AND mabi.businessactionitemid IN (
SELECT
businessactionitemid
FROM
mabusinessactionitem mabi
INNER JOIN mabusinessaction maba ON maba.businessactionid = mabi.businessactionid
WHERE
documentnumber = '32103'
AND STATUS != 1
AND accountid = 0
)
) mb ON mb.accountid = mabi.accountid;