I'm wondering whether exists any database engine that can share cells or rows amongst many tables. For example:
TABLE Customer (
CID: int
Fullname: nvarchar(50)
Age: int
)
TABLE Group (
GID: int
Name: nvarchar(50)
)
TABLE Customer_Group (
CusName: nvarchar(50)
GrpName: nvarchar(50)
)
In which, Customer_Group
is designated for a certain query, like a column family in Cassandra. Now I want to insert to Customer_Group
table a row whose CusName
cell references to Fullname
cell of a row in table Customer
. Similar to GrpName
.
As a result, when I update Fullname
in Customer
table, I don't have to update Customer_Group
table, because it references to same cell address. And Customer_Group
table itself doesn't have to store actual data for CusName
but in fact is a pointer.
Does anyone know what database engine supports this idea? And is it a good idea though?
Best Answer
In conclusion, either you change the joining column, or try to active the cascading on update capabilities of your DBMS.