The SET clause is a list of columns to be changed or made; the WHERE clause tells the statement which rows to use.For this discussion, we will assume the user doing the update has applicable UPDATE privileges for each .The update query below shows that the PICTURE column is updated by looking up the same ID value in CATEGORY_ID column in table Categories_Test and Categories. If you need to update multiple columns simultaneously, use comma to separate each column after the SET keyword. Here we only want to update PICTURE column in Categories_Test table where the data in Category_Name column is Seafood in table Categories. Software and hardware names mentioned on this site are registered trademarks of their respective companies.
I can select the records fine with this syntax (testing in Oracle SQL* Plus) SELECT NAMEINFO. When you give a table expression a correlation name, it is to act as if a materialized table with that correlation name has been created in the database.Finally, the old rows are deleted and the new rows are inserted.If an error occurs during all of this, then system does a ROLLBACK, the table is left unchanged and the errors are reported.It is also possible that this subset will be empty.This subset is used to construct a new set of rows that will be inserted into the table when the subset is deleted from the table. I can't see any reason for an outer join in the query, but of course, I don't know what you're trying to do. TOWN; However, I tried to update the names and failed. I wasn't sure whether or why you were trying to do an outer join, so I put that part of the syntax in brackets. tablespace_name, s.extent_management FROM user_tables t, user_tablespaces s WHERE t.tablespace_name = s.Cross table update (also known as correlated update, or multiple table update) in Oracle uses non-standard SQL syntax format (non ANSI standard) to update rows in another table. Update data in table A based on two or more common columns in table B.The differences in syntax are quite dramatic compared to other database systems like MS SQL Server or My SQL. Updates based on two or more common columns are normally used for tables where multiple columns work together as a primary key (known as composite primary key).In this article, we are going to look at four scenarios for Oracle cross table update. Category_ID) where exists ( select * from Categories b where b. These columns uniquely identify a record in a table.