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The Oracle UPDATE statement is used to update existing records in a table in an Oracle database.If this is something you need to do all the time, I would suggest something else, but for a one-off or very small tables it should be [email protected]_horse_with_no_name: Oracle does not directly support the JOIN keyword in an UPDATE, but it allows UPDATE involving JOIN operations between table in at least 2 different ways, look at the accepted answer here: stackoverflow.com/questions/2446764/…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).

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If this happens, the UPDATE will terminate with an error ("subquery may return only one row").

As with the INSERT section, I rolled back the changes to the original table.

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.

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Update data in table A based on two or more common columns in table B.

Notice that the WHERE clause identifies which row will be updated with Oracle UPDATE SQL.

Category_ID) where exists ( select * from Categories b where b.

These columns uniquely identify a record in a table.

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