Is relational DBMS physical data model suitable for spatial data?如果不适合,有哪两类解决途径?
第1题:
The relational database model requires the data be(110)through programs that don't rely on the position of the data in the database. This is in direct(111)to the other database mode, where the program has to follow a series of pointers to the data it seeks. A program(112)a relational database simply asks for the data it seeks; the DBMS performs the necessary searches and(113)the information. The(114)on how the search is done are specific to the DBMS and vary from product to product.
A.accessed
B.moved
C.read
D.wrote
第2题:
(73) is a query language for manipulating data in a relational database.
A.Assemble
B.SQL
C.C++
D.Fortran
第3题:
The X.25 standard specifies three layers of functionality.Which layers of the OSI model correspond to the X.25 layers?
A.the Physical, Network, and Session Layers
B.the Physical, Data Link, and Network Layers
C.the Physical, Data Link, and Transport Layers
D.the Physical, Session, and Presentation layers
第4题:
A. data link
B. network
C. transport
D. presentation
E. physical
第5题:
A. The application layer
B. The session layer
C. The data link layer
D. The transport layer
E. The network interface layer
F. The physical layer
第6题:
A. Application Layer
B. Presentation Layer
C. Data Link Layer
D. Physical Layer
第7题:
The TCP/IP stack is a complete set of networking protocols. The OSI Model was meant
to be a standardized way of connecting devices together. and most protocols have some direct
correlation to the OSI Model. The OSI Model has 7 layers. the foruth layer is called(75)
A. physical layer
B. data link Iayer
C.application layer
D.transport layer
第8题:
(73)is a query language for manipulating data in a relational database.
A.Assemble
B.SQL
C.C++
D.Fortran
第9题:
A. application layer
B. session layer
C. transport layer
D. internet layer
E. network layer
F. data link layer
G. physical layer
第10题: