Question

我有以下结构，我想将其转换为表（RDBMS）。

1)
Structure(
      // 1st entry
      "HK"
      Structure(
      "Aggressive Price", 100
      "Passive Price",    90,
      "Quantity", 1000
      "Tick Ladder", [ [ 0.1, 1 ],
                       [ 0.2, 2 ],
                       [ 0.3, 3 ] 
                     ]
      ),                  
     //2nd entry
     "JP",
      Structure(
      "Aggressive Price", 100
      "Passive Price",    90,
      "Quantity", 1000
      "Tick Ladder", [ [ 0.1, 1 ],
                       [ 0.2, 2 ],
                       [ 0.3, 3 ] 
                     ],
      Aggressive limits, Structure( "ABC", 10, "SCD", 20 )
      )         
)         

2)
Structure(
      // 1st entry
      "Algo1"
      Structure(
      "Aggressive Price", 100
      "Passive Price",    90,
      "Quantity", 1000
      "Tick Ladder", [ [ 0.1, 1 ],
                       [ 0.2, 2 ],
                       [ 0.3, 3 ] 
                     ]
      ),                  
     //Second entry
     "JP",
      Structure(
      "Aggressive Price", 100
      "Passive Price",    90,
      "Quantity", 1000
      "Tick Ladder", [ [ 0.1, 1 ],
                       [ 0.2, 2 ],
                       [ 0.3, 3 ] 
                     ],
      Aggressive limits, Structure( "ABC", 10, "SCD", 20 )
      )         
)         

Structure(
      // 1st entry
      "Algo2"
      Structure(
      "Aggressive Price", 100
      "Passive Price",    90,
      "Quantity", 1000
      "Tick Ladder", [ [ 0.1, 1 ],
                       [ 0.2, 2 ],
                       [ 0.3, 3 ] 
                     ]
      ),                  
     //Second entry
     "JP",
      Structure(
      "Aggressive Price", 100
      "Passive Price",    90,
      "Quantity", 1000
      "Tick Ladder", [ [ 0.1, 1 ],
                       [ 0.2, 2 ],
                       [ 0.3, 3 ] 
                     ],
      Aggressive limits, Structure( "ABC", 10, "SCD", 20 )
      )         
)

1） - 包含国家“HK”＆amp; amp;的参数。 “JP”。

2） - 包含“Algo1”和“Algo2”的相同参数。参数的值可以变化。将此表示为关系模式的最佳方式是什么。

解决方案我在考虑

1）具有激进价格，被动价格，数量，刻度梯的表“参数”

2）参考表参数

的表“Country”

3）表格“Algo”，它引用表参数

4）用于存储梯形图值的表“Ladder”，它将被“Parameter”数组引用。

如何为引用“参数”等的“国家/地区”表生成唯一键？

还有其他更好的方法吗？

Answer 1

这样的事情是不是很明显？

create table countries (country_code char(2) primary key,
                        country longtext);

create table algos (pk char(40) primary key,
                    country_code_fk char(2),
                    aggressive_price decimal(8,2),
                    passive_price decimal(8,2),
                    quantity int,
                    tick_ladder enum);

create table aggressive_limits (algo_fk char(40),
                                field_0 char(3),
                                field_1 int,
                                field_2 char(3),
                                field_3 int);

将结构化数据转换为RDBMS中的表

1 个答案: