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dynamic columns

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key
value



1
col_1
a1



2
col_2
b1



3
col_1
a2



4
col_2
b2



5
col_1
a3



6
col_2
b3






    
                		
                
                    

                          
                                
                                
                        
                         



                        
                        
                        

                        

                        
                        

                          
                                
                                
                                  

                                    
λ

                                    

                                      .NET NoSQL database for rapid development