database - In hive, Need a values from a table to compared with 3 different tables -


need compare 1 table different tables:

in hive, need 1 query compare 1 table 3 different lookup tables.

if record matched 3 lookup tables, record should updated "passed"

if 1 of record failed mis-match of tables, record should updated , marked "failed reason" , correct value should displayed

say:

master table

empno empname class school marks1 marks2 marks3  101   scott   3     mov    50     70     80  102   tiger   6     mvm    60     70     80 103   rayon   7     colors 90     90     90

lookup tables:

employee:

empno empname 101 scott 102 tiger 103 spangler 104 mike 105 aligarh

address:

class school location  phonenumber  4 mvm    idaho     120232 6 tem    texas     120394 3 mov    edinburgh 120479 6 pram   vatican   12098 7 lexi   salem     12092 7 colors salem     12092 9 ray    shimla    13490

marks:

m1 m2 m3 50 60 80 50 70 80 80 74 79 90 90 90 30 50 45

here, first record master table compared employee table, address table & markts table

1-> empno 101 , empname scott master table matches first record in employee lookup table, matches third record in address lookup table & second record in marks lookup table - should updated passed in tables

2-> empno 102 , empname tiger matches second record in employee lookup table not match record in address lookup table , not match marks table should updated not match address , marks table

3-> empno 103 , empname rayon not match record in employee lookup table matches sixth record in address lookup table , matches fourth record in marks lookup table

record 1 in master table should updated passed in 3 tables record 2 in master table should updated failed in address , marks lookup table record 3 in master table should updated failed in employee lookup table

+-------+---------+-------+---------+--------+--------+--------+----------------------------------------------------------------------+----------------------------------------------------+ | empno | empname | class | school  | marks1 | marks2 | marks3 |                                result                                |                       reason                       | +-------+---------+-------+---------+--------+--------+--------+----------------------------------------------------------------------+----------------------------------------------------+ |   101 | scott   |     3 | mov     |     50 |     70 |     80 | matched 3 tables                                                 | na                                                 | |   102 | tiger   |     6 | mvm     |     60 |     70 |     80 | did not match in  address , mark table                             | school value should mvm  & marks 1 should 60 | |   103 | rayon   |     7 | colors  |     90 |     90 |     90 | did not match in employee table other tables matched | empname should rayon                            | +-------+---------+-------+---------+--------+--------+--------+----------------------------------------------------------------------+----------------------------------------------------+

this gives basic representation, can manipulate further pleased.

select      t.*            ,case when e.empno null 0 else 1 end     employee            ,case when a.class null 0 else 1 end     address            ,case when m.m1    null 0 else 1 end     marks                      master      t              left join   employee    e              on          e.empno     =                         t.empno                      , e.empname   =                         t.empname              left join   address                  on          a.class     =                         t.class                      , a.school    =                         t.school              left join   marks       m              on          m.m1        =                         t.marks1                      , m.m2        =                         t.marks2                      , m.m3        =                         t.marks3 ; 
+--------+----------+--------+---------+---------+---------+---------+-----------+----------+--------+ | empno  | empname  | class  | school  | marks1  | marks2  | marks3  | employee  | address  | marks  | +--------+----------+--------+---------+---------+---------+---------+-----------+----------+--------+ | 101    | scott    | 3      | mov     | 50      | 70      | 80      | 1         | 1        | 1      | | 102    | tiger    | 6      | mvm     | 60      | 70      | 80      | 1         | 0        | 0      | | 103    | rayon    | 7      | colors  | 90      | 90      | 90      | 0         | 0        | 1      | +--------+----------+--------+---------+---------+---------+---------+-----------+----------+--------+

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