Transactional database
Description
- A transactional database is a set of transactions.
- Each transaction contains a transaction-identifier (TID) and a set of items.
| TID | Transactions |
|---|---|
| 1 | a, b, c |
| 2 | d, e |
| 3 | a, e, f |
Rules to create a transactional database
- Since the TID of a transaction directly represents its row number in a database, we the algorithms in PAMI ignore the TID information to save storage space and processing time.
- The items in a transactional database can be integers or strings.
- All items in a transaction must be seperated with a separator.
- ‘ Tab space ’ is the default seperator used by the mining algorithms in PAMI. However, transactional databases can also be constructed using other separators, such as comma and space.
Format
item1<sep>item2<sep>...<sep>itemNExample
a b c
a d e f
b d