我有一个非常复杂的Union查询,最多返回两行。如果第二列到第15列在两个记录中都相同,我想返回第二条记录的结果。否则,返回作为最新记录的第一条记录的结果。目标是仅在数据不相同时才返回带有挂起标志的最新名称和地址。
SELECT TOP 1
1 AS updatePending,
a.entity_number,
a.name_title,
a.name_first,
a.name_middle,
a.name_last,
a.name_suffix,
LTRIM(RTRIM(REPLACE(
LTRIM(RTRIM(ISNULL(a.name_first, ''))) +
CASE WHEN LEN(LTRIM(RTRIM(ISNULL(a.name_first, '')))) = 1 THEN '. ' ELSE ' ' END +
LTRIM(RTRIM(ISNULL(a.name_middle, ''))) +
CASE WHEN LEN(LTRIM(RTRIM(ISNULL(a.name_middle, '')))) = 1 THEN '. ' ELSE ' ' END +
LTRIM(RTRIM(ISNULL(a.name_last, ''))) + ' ' +
LTRIM(RTRIM(ISNULL(a.name_suffix, '')))
,' ',' '))) AS name_full,
NULLIF(LTRIM(RTRIM(
LTRIM(RTRIM(ISNULL(a.company, ''))) +
LTRIM(RTRIM(ISNULL(a.firm_name, ''))))),'') AS company,
a.address1,
a.mailing_address,
a.city,
a.state,
a.zip_code AS zipcode,
a.internet_address AS email_address,
a.time_stamp
FROM statebar.dbo.STAGING_Address_Change_Request a
INNER JOIN Member m ON m.entity_number = a.entity_number
WHERE a.entity_number = (
SELECT m.entity_number
FROM Member m
INNER JOIN Named_Entity ne ON (ne.entity_number = m.entity_number)
WHERE ne.name_last = 'Park'
AND m.birth_year = '1958'
AND m.barno = '12345'
)
AND a.time_stamp > m.time_stamp
UNION ALL
SELECT TOP 1
0 AS updatePending,
ne.entity_number,
ne.name_title,
ne.name_first,
ne.name_middle,
ne.name_last,
ISNULL(ne.name_suffix, ''),
LTRIM(RTRIM(REPLACE(
LTRIM(RTRIM(ISNULL(ne.name_first, ''))) +
CASE WHEN LEN(LTRIM(RTRIM(ISNULL(ne.name_first, '')))) = 1 THEN '. ' ELSE ' ' END +
LTRIM(RTRIM(ISNULL(ne.name_middle, ''))) +
CASE WHEN LEN(LTRIM(RTRIM(ISNULL(ne.name_middle, '')))) = 1 THEN '. ' ELSE ' ' END +
LTRIM(RTRIM(ISNULL(ne.name_last, ''))) + ' ' +
LTRIM(RTRIM(ISNULL(ne.name_suffix, '')))
,' ',' '))) AS name_full,
NULLIF(LTRIM(RTRIM(
LTRIM(RTRIM(ISNULL(ne.company, ''))) +
LTRIM(RTRIM(ISNULL(ne.firm_name, ''))))),'') AS company,
ISNULL(ne.address1, ''),
ne.mailing_address,
ne.city,
ne.state,
ne.zip_code,
ne.internet_address AS email_address,
m.time_stamp
FROM Member m
INNER JOIN Named_Entity ne ON (ne.entity_number = m.entity_number)
LEFT JOIN statebar.dbo.STAGING_Address_Change_Request a ON a.entity_number = m.entity_number
WHERE ne.entity_number = (
SELECT m.entity_number
FROM Member m
INNER JOIN Named_Entity ne ON (ne.entity_number = m.entity_number)
WHERE ne.name_last = 'Park'
AND m.birth_year = '1958'
AND m.barno = '12345'
)
AND m.time_stamp > a.time_stamp
ORDER BY updatePending DESC, a.time_stamp DESC