Chapter 9, Search
1. Lookup table:
A collection of data of the same type. Search is divided into static search and dynamic search.
1. Static search:
When looking up, only the data elements are queried or retrieved, which is called static lookup.
2. Dynamic search:
While implementing the lookup, inserting a record that does not exist in the lookup table, or deleting a record that exists in the lookup table, the lookup table is called dynamic lookup.
two,