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Editorial Team
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Asked: 2026-06-16T04:55:38+00:00

Table 1 – USERS : user_id | email_id | type ————————————— 000121 | test_20@test.com

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Table 1 – USERS:

user_id | email_id         | type
---------------------------------------
000121  | test_20@test.com | EXT
000125  | best_21@test.com | LOT
000128  | lite_21@test.com | EXT

Table 2- HISTORY:

old_user_id | new_user_id | another_type
----------------------------------------
000128      | 000121      | INIT

I have email_id in hand say test_20@test.com, I want to do a join query that should return 1, if the user_email_id I had, is in USERS table with EXT as TYPE and in HISTORY table with ANOTHER_TYPE as INIT;

I have a query with a single join for old_user_id .

IF EXISTS (SELECT 1 FROM   history cmr (nolock) 
                  INNER JOIN users au (nolock) 
                          ON au.user_id = cmr.old_user_id 
                  AND cmr.another_type = 'INIT  'AND au.type = 'EXT' 
                   AND au.email_id = 'test_20@test.com') 
  SELECT 1 ELSE   SELECT 0

When I query test_20@test.com or test_20@test.com, it should return 1. I want to add the join condition for new_user_id also .

So either user (old or new) should be EXT in USERS, and should be INIT in HISTORY

Thanks in advance

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1 Answer

  1. Editorial Team
    IF EXISTS 
(
SELECT * FROM   history cmr 
Left JOIN users au  ON au.user_id = cmr.old_user_id  AND cmr.another_type = 'INIT  'AND au.type = 'EXT'  AND au.email_id = 'test_20@test.com' 
Left JOIN users au2  ON au2.user_id = cmr.new_user_id  AND cmr.another_type = 'INIT  'AND au2.type = 'EXT'  AND au2.email_id = 'test_20@test.com'
Where (au.user_id is NOT NULL) or (au2.user_id is NOT NULL)
)
SELECT 1 ELSE   SELECT 0
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