我无法构建复杂的查询。在我的查询下查看我的结果示例。 我希望我的查询只返回日期最长的条目(2014-02-19 16:25:11),其中program_id,名称和类型相同,且值不同。
SELECT
LPAD(convert( master_program.program_id USING utf8),
5,
'00000') AS program_id,
rate.name,
rate.type,
rate.value
FROM
master,
master_program,
programs,
rate_group,
rate
WHERE
master.id = master_program.master_id
AND master_program.program_id = programs.id
AND rate_group.master_id = master.id
AND rate_group.id = rate.rate_group_id
AND master.is_deleted = 0
AND rate_group.is_deleted = 0
AND master.is_payout = 0
ORDER BY program_id, name
----结果示例----
program_id | name | type | value | last_modified_date
-------------------------------------------------------------
-> 00470 | Default | PPL | 4.6900 | "2014-02-17 16:13:16" (same but different value)
-> 00470 | Default | PPL | 0.0000 | "2014-02-19 16:25:11" (same but different value)
00470 | G1 | PPL | 5.0000 | "2014-02-19 16:25:11"
00470 | G2 | PPL | 3.5000 | "2014-02-19 16:25:11"
00015 | Default | PPL | 0.0000 | "2014-02-19 16:25:11"
00015 | Default | PPL | 0.0000 | "2014-02-19 16:25:11"
感谢您的时间和帮助!
答案 0 :(得分:0)
您错过了last_modified_date
字段的select语句,但无论如何,请将您的select语句更改为:
SELECT
LPAD(convert( master_program.program_id USING utf8),
5,
'00000') AS program_id,
rate.name,
rate.type,
rate.value,
MAX(table.last_modified_date)
WHERE....