This ensures that BICS is completely on cloud and no installation on client machine is required for repository data modelling and everything required for Analytical Reporting can be achieved using a browser alone.
1) Row level trigger - An event is triggered for each row upated, inserted or deleted.
2) Statement level trigger - An event is triggered for each sql statement executed.
However, when writing program code it’s better to specify each column individually.
The performance will be the same, but by being explicit you will always know what columns you are returning from the query.
We can create a trigger to update the 'product_price_history' table when the price of the product is updated in the 'product' table.
1) Create the 'product' table and 'product_price_history' table Once the above update query is executed, the trigger fires and updates the 'product_price_history' table.
This chapter focuses on very basic SELECT statements.
It is important to have a solid understanding of the basics as many of the topics covered here are not only present in more difficult recipes but also are found in everyday SQL. Using it will return every column for the table specified.
In 40 years, there's been some amazing functionality in the database.
For nearly half of that time, Ask Tom has been there.
Oracle clears out any unneeded transactions in the rollback segment but eventually it fills up and the error occurs.