Question

For ID =101 Data is coming from different TABLE

All the TABLES have a ID column

           Name      Income     
Table_A     a        $6,868     
Table_B     b        $4,443 
Table_C     c        $6,726     
Table_D     d        $10,163    
Table_E     e        $4,853 
Table_F     f        $3,368 

To get result like above Should I use UNION or Inner JOIN ?

TABLE_A

ID  NAME  INCOME
101  a    $6,868    


TABLE_B

ID  NAME  INCOME
101  b    $4,443    

like that other table

so should I use Inner Join or UNION here ?

Answer 1

If row X is computed by looking only at table X, then UNION is the correct tool to use.