SQL Server 2008 : PASS matching records

Question

TableA (id int, batch char(15), mode char(10), match2 char(15), status char(15))

ID Match  MODE  match2 STATUS
1  ABC12   A     123
2  ABC12   A     123
3  ABC12   A     123
4  ABC12   B     234
5  ABC12   B     234
6  BCD32   A     456
7  BCD32   B     456

So, I need to populate Status with 'PASS' where mode = 'B' and

1. For same match, if its corresponding mode A (ID1,2,3) if we talk about ABC12, It has different Match2.

So ID 4 and 5 will get "PASS".

Thanks in advance.

Answer 1

Try the following:

CREATE TABLE TableA (id int, match char(15), mode char(10),match2 char(15), status char(15))


INSERT INTO TableA (ID, Match,  MODE,  match2)
SELECT 1,  'ABC12',   'A',     123 UNION
SELECT 2,  'ABC12',   'A',     123 UNION
SELECT 3,  'ABC12',   'A',     123 UNION
SELECT 4,  'ABC12',   'B',     234 UNION
SELECT 5,  'ABC12',   'B',     234 UNION
SELECT 6,  'BCD32',   'A',     456 UNION
SELECT 7,  'BCD32',   'B',     456 UNION
SELECT 8,  'ABC23',   'A',     NULL UNION
SELECT 9,  'ABC23',   'B',     789


UPDATE
    t1
SET
    status = 'PASS'
FROM
    TableA AS t1
JOIN
    TableA AS t2
ON
    t1.id != t2.id
AND t1.match = t2.match
AND (t1.match2 != t2.match2 OR t2.match2 IS NULL)
AND t2.mode = 'A'
WHERE
    t1.mode = 'B'

SELECT * FROM TableA