What is cache size in Oracle sequence?

An Oracle sequence is a database object that provides unique integer values. The sequence cache size determines how many values Oracle preallocates in memory, in the Shared Pool. By preallocating values, Oracle returns the next unique value from memory providing faster access to the information.Click to see full answer. Also, what is last number in Oracle sequence?From the documentation for the all_sequences data dictionary view, last_number is: Last sequence number written to disk. If a sequence uses caching, the number written to disk is the last number placed in the sequence cache. This number is likely to be greater than the last sequence number that was used.Similarly, how does sequence work in Oracle? In Oracle, you can create an autonumber field by using sequences. A sequence is an object in Oracle that is used to generate a number sequence. This can be useful when you need to create a unique number to act as a primary key. Besides, what is noorder in Oracle sequence? If you are using exclusive mode, sequence numbers are always generated in order. NOORDER. Specify NOORDER if you do not want to guarantee sequence numbers are generated in order of request. This is the default.What is the max value of sequence in Oracle?The default is NOMAXVALUE, which means the maximum value is 10 27. Specifies the smallest value the sequence number can reach. The default is NOMINVALUE, which means the minimum value is 1. Specifies that when sequence numbers reach MAXVALUE they will begin again at MINVALUE.