Relational Model » Exercise – 1
3. A Foreign Key is :
(a) A field in a table that matches a key field in another table.
(b) A field in a table that has the same name as a key field in another table.
(c) A field in a table that contains data that is also contained elsewhere in another table.
(d) None of these
| General Knowledge Books |
Related Posts
X.25 Protocol » Exercise - 112. X.25 protocol was recommended by CCITT in : (a) 1975 (b) 1976 (c) 1977 (d) 1978- Relational Model » Exercise - 19. The language used in application programs to request data from the DBMS is referred to as the : (a) DML (b) DDL (c) VDL (d) SDL
- TCP/IP Model » Exercise - 1 1. TCP/IP reserve _______ ports for protocols. (a) 21 (b) 24 (c) 1024 (d) 2042
- X.25 Protocol » Exercise - 111. X.25 is a : (a) Protocol (b) Technology (c) Data service (d) Telephone service
- Introduction to DBMS » Exercise - 17. A description on a particular collection of data using the given data model ; (a) Database (b) Relation (c) Schema (d) None