How can I do an UPDATE statement with JOIN in SQL Server?

SQL

I need 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.


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Yes, it is possible to do an UPDATE statement with JOIN in SQL server. The JOIN clauses can be used in the UPDATE statement to perform a cross table update.



Below is the syntax of the  UPDATE JOIN clause:



UPDATE 


    table1


SET 


    table1.col1 = table2.col2,


    table1.col2 = expression,


    ...   


FROM 


    table1


    [INNER | LEFT] JOIN table2 ON join_predicate


WHERE 


    Where_predicate;

 
 

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