In addition to the tables, you also need to create additional database objects, such as sequences and triggers, to support the tables. System generated primary keys will be used for all tables so that all the data can be edited without executing a cascade update. Topics in this section in...
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For this exercise the ‘Insert’ method will be used. Each row processed in the Excel file will result in an INSERT statement executed on the table we’re importing to. If you choose ‘Insert Script’, the wizard will end with an INSERT Script in your SQL Worksheet. This is a nice alt...
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like Tom: write a query to insert the 'updated' records in a new table, using the /*+ APPEND */ hint. You have no indexes to update, no constraints to validate and you generate almost no redo. Next, I truncate the old table, after I have disabled all constraints and triggers (...
Notice that the sequences used for the primary keys start at 40 in order to leave room for the demonstration data. Because the BEFORE INSERT triggers are coded so that the sequence is only accessed if a primary key value is not provided, they will not need to be disabled in order for ...