How to UPDATE statement with JOIN in SQL Server?

Question

How to UPDATE statement with JOIN in SQL Server?

I want to update this table in SQL Server with data from its 'parent' table, see below:

Table: sale*

id (int)
udid (int)
assid (int)

*Table: ud



id  (int)

assid  (int)

sale.assid contains the correct value to update ud.assid.

What query will do this? I'm thinking of a join but I'm not sure if it's possible.

sql sql-server

3 years ago by rahul07

2 Answers

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**Sonali7** · Answer 1 · 2021-05-01T11:07:29

The following code can be implemented in SQL Server to UPDATE statement with JOIN:

update u

set u.assid = s.assid

from ud u

    inner join sale s on

        u.id = s.udid

**espadacoder11** · Answer 2 · 2021-05-03T13:59:11

A standard SQL approach would be



UPDATE ud

SET assid = (SELECT assid FROM sale s WHERE ud.id=s.id)

On SQL Server you can use a join



UPDATE ud

SET assid = s.assid

FROM ud u

JOIN sale s ON u.id=s.id

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How to UPDATE statement with JOIN in SQL Server?

2 Answers

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