Sql inner join update oracle

Learn more. Asked 3 days ago. Active 3 days ago. Viewed 44 times. Improve this question. New contributor. MatBailie We didn't study that command in my course. Is there some other way? Add a comment. As you can see, it is more readable than the previous solution. Keep this in mind when using it and test it before use in a production environment. What about PostgreSQL? We have just a few differences with the syntax as we do not specify the join.

In this case we do not need to specify the first table on which we will do the update. The rest is exactly the same as in SQL Server. Let's test the code with the CTE please note that in PostgreSQL we need to put all column names that have been created with a capital letter under quotes otherwise it will not recognize them!

BillingCity from invoice inner join customer on invoice. CustomerId where customer. CustomerId , sum invoiceline. InvoiceId inner join Track on Track. TrackId inner join customer on customer. C2 SET G1. C2, G2. Mainly, there are a couple of syntaxes to perform a query update in Oracle either by depending on a traditional update or modifying one table with data records from another table. Firstly, let us view the syntax for Oracle update with Join clause to update a single table typed as follows:.

The other type of oracle syntax for update with join while updating a single table with data from the other table is as follows:. The Update with Join query works in Oracle by the following steps where we have supposed to have two tables Orders and OrderInfo like shown below which will be simple to elaborate also:. Now, we will perform the update query with JOIN clause on table orderInfo based on the Orders table column values so that the resultant table provides an output of join using the query command as:.

OrderNum SET orderinfo. Fan of better aliases Just a point here, if your key trg. Marc In the ON , trg is the alias for the master table, table1 "outer" table by your logic , and src references the USING group "inner table" by your logic.

But yeah, probably could've been referenced better, but I was able to follow it. This can work in some cases, but the view has to be "key-preserved" every joined table has to be equality-joined on its primary key or otherwise unique fieldset. This makes sure every record in the target table contributes to at most one record in the resulting rowset, and, hence, every record in the target table is updated at most once. Show 3 more comments. Roland Roland 6, 11 11 gold badges 55 55 silver badges bronze badges.

This version is arguably cleaner, but it is not trigger friendly because there is no way I am aware of to avoid triggering update triggers for unchanged rows using this syntax.

I am assuming that the triggers are needed for the changed rows. Do not use some of the answers above. Also, ensure that there are primary keys on all the tables you are joining.

Morten Anderson Morten Anderson 2, 14 14 silver badges 19 19 bronze badges. Alexis Dufrenoy Alexis Dufrenoy This doesn't work for me. It updates the entire table. Can set multiple properties by adding a comma at the end of that.

I needed to do t1. FirstName, t1. LastName on a table after matching it on the "UserName" column t1. The database was such where it was using UserName as a primary key to UserInfo everywhere, instead of placing FirstName and LastName in the table, directly.

This fixed that! This answer adds nothing to the answer already provided by Quassnoi five years before yours. This following syntax works for me. Jim Garrison Hemant Hemant 49 1 1 bronze badge.