Oracle update with select join

Let us query the update statement command in oracle where multiple columns update can be performed with one update command query as follows:. Here, to update multiple table columns we have separated the value pairs with commas, therefore, the output will be as shown above where mentioned column value pairs are updated.

We will execute the update statement in Oracle that will update the columns values from other table as follows:. In this article, we have learned about the Oracle Update with Join query which is responsible for execution of the cross-table update. In this way, the existing data in the database can be modified with this Oracle update with join query commands that helps to update within a same table or multiple tables.

This is a guide to Oracle Update with Join. Here we discuss the definition, syntax, and How update with join works in Oracle? You may also have a look at the following articles to learn more —.

Active 6 years, 11 months ago. Viewed 27k times. Improve this question. Add a comment. Active Oldest Votes. PHONE, c. FAX, p. Improve this answer. Daren Beattie Daren Beattie 34 1 1 bronze badge. Fixed the 1st one missing parentheses and added a 3rd way. Show 7 more comments. Quassnoi Quassnoi k 88 88 gold badges silver badges bronze badges. Works perfectly but Oracle required me to say merge into table 1 t and so forth.

Late to the party, but this is still a good thread. I need to know, tho' Master table, "table1". Table2, aliased as t2, but in the ON, the references are External Table1 - not t1 - is this a reference to the outer table or a type?

Not t2? Je suis confused. 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. Dave and Tom said But before we go there, lets just understand what "update where current of" is doing. Basically, when you use an "update where current of", PLSQL is retrieving the rowid at query time and issueing an update When we do two tables, as long as only one of the tables is "for updatable", PLSQL does the right thing: declare cursor c is select t.