sql - Select distinct on two tables -


I would like to select datas without duplicate tables

for example 

  Table 1 Data 1; Data2; Data3; Data4; Data 5 table2 data1; Data2; Data 3   
 Data 1, Data2, Data 3 are the same data types  
 table1  
  | Data 1 Data2 Data 3 Data 4 Data 5 | ---------- | ---------- | ---------- | ---------- | ----- ----- | | Value 1.1 Price 2.1 Price 3.1 | Price 4.1. Value 5.1   
 Table 2  
  | Data 1 Data2 Data 3 | ---------- | ---------- | ---------- | | Value 1.1 Price 2.1 Price 3.1 | | Value 1.2 Price 2.2 | value3.2 | | Value1.3 | Price 2.3 | Value3.3 |   
 I would like to select Data 1, Data 2, Data 3 from my two tables with a separate data1  
  | Data 1 Data2 Data 3 | ---------- | ---------- | ---------- | | Value 1.1 Price 2.1 Price 3.1 | | Price 1.2 | Price 2.2 | Value3.2 | | Value1.3 | Price 2.3 | Value3.3 |   
 I want to have my results in just 3 columns for example.1.1 is from table 1 and value1.2 is from table2   
 < In essence, you want the following:   Data 1, data2, data 3 to table1 union / * without divX = "post-text" itemprop = "text"> 
 The Association of Alternatives will complete the duplicate in all the two tables / Select Data / Data 1, Data2, Table 3 to Table 2,   
 However, there is still something that will make you clear Need come State:  
 
 I want to select data1 from data1, data2, my two tables with a different data1  
 The problem is that you do not It is said that if you make a fake  data1  two tables, what should happen.  
 Suppose the values ​​in a line with  table1  values ​​are  (1, a, b)  and  table 2  Along with a line is  (1, X, Y) . Which row should be included in the final output? 
 The two rows will be included in the above query because they are different in columns:  data2  and  data3 .   
  Edit for comment :  
 
 P> You still need  Union , but you have to control which lines will join the union. note:. Because now your query will ensure that you see a duplicate, you can use  unions all  doens't trying to finish that DMBS duplicate does not exist Waste processing time  < select pre>  select data1, data2, table1 unions, select all data1, data2, table2 where not exist from data3 data3 (table1 * ou table1.data1 = table2.data1)

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