Updating more than one column

14 Mar

In other words, a target row shouldn't join to more than one row from the other table(s).

So, SCD goes fine in the scenario where we need to update many columns in the same table against the same primary key in the target.Syntax update statement ::= Description of the illustration update_Keyword and Parameter Description alias Another (usually short) name for the referenced table or view, typically used in the contains references to columns in the table being updated, the references are resolved in the context of the current row.In some databases, such as Postgre SQL, when a FROM clause is present, what essentially happens is that the target table is joined to the tables mentioned in the fromlist, and each output row of the join represents an update operation for the target table.You need not specify the partition name when updating values in a partitioned table.However in some cases specifying the partition name can be more efficient than a complicated Specify a complete or partial name of a database link to a remote database where the object is located.