Updating table using cursor in oracle
You can import schemas or portions of schemas from existing data sources.
Additionally, you can create objects in the Physical layer manually.
A nested table type or varray type that is created at schema level (with the CREATE TYPE Statement) is stored in the database, and you can manipulate it with SQL statements.
A collection has only one dimension, but you can model a multidimensional collection by creating a collection whose elements are also collections.
You can pass composite variables to subprograms as a parameters.
To create a collection or record variable, you first define a collection or record type, and then you declare a variable of that type. A collection that is created in a PL/SQL block (with the syntax in Collection) is available only in that block.
I've been dealing with this error off and on for the last 3 years and I just wanted to verify that my understanding of its cause is accurate.
Cause 1) There is only one user logged into the database.
That is, you can only update the same row of the target table once in the same MERGE statement.This chapter explains how to create and use PL/SQL collection and record variables.