For the datatype of DATE Oracle always stores both date and time. If you need just the date, you can use trunc() function to put the time at midnight, but you have not an option to store only the time.
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Why doesn't the Oracle optimizer use my index?
Querying too much data
Most Oracle developers know that an index is useful when you can use it to restrict your result set to a small number of the total rows in a table.
So, the obvious side…
This video shows syntax for various backup options while discussing how the different basic backup types work. It explains how to take full backups, incremental level 0 backups, incremental level 1 backups in both differential and cumulative mode a…