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Relational Model表示（）。
- A、关系模型
- B、数据结构
- C、网络
- D、实体
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● (73) is a query language for manipulating data in a relational database.(73) A. AssembleB. SQLC. C++D. Fortran
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（73)is a query language for manipulating data in a relational database.A.AssembleB.SQLC.C++D.Fortran
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问答题Is relational DBMS physical data model suitable for spatial data？如果不适合，有哪两类解决途径？
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