Collect statistics can be prefixed and used with many commands. It helps to use collect stats efficiently. Some privileges need to be granted when using these commands.
Let us suppose you are tuning a query which involves some terabytes of tables with 100 million rows. You have a requirement to change the PI, or to add a PPI, or to change the joining conditions, to analyze the query. Without changing the definition of the table, you are not able to check the explain plan. The only way you can achieve this is by changing the table structure, which needs a lot of resources and needs to be done during off-peak hours. And you don't even know if changing the DDL will work. So, to achieve this, we can create a copy of the ...
