oracle minus 的用法
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有meter 和aday_data两张表,meter下有meternum和dcu_code。aday_data中有meternum和data_time。
怎么查在meter表的meternum而不在aday_data表中的数据。data_time为限制条件(时间)
要求显示dcu_code和meternum
from meter
where meternum in
(select meter.meternum from meter
minus
select aday_date.meternum from aday_date where data_time = '输入你想要的限制条件') 参考技术A select meternum,dcu_code
from meter
where meternum in
(select meter.meternum from meter
minus
select aday_date.meternum from aday_date)
ORACLE MINUS 关键字的 ANSI SQL 标准
【中文标题】ORACLE MINUS 关键字的 ANSI SQL 标准【英文标题】:ANSI SQL standard for ORACLE MINUS keyword 【发布时间】:2014-11-21 11:59:38 【问题描述】:我有 Query,我想与 ANSI SQL 标准兼容。在这个 使用 oracle 查询 MINUS 键工作,我想要 ANSI SQL,它是 放置在 MINUS 关键字上
SELECT 'F' selected,
UPPER (( a.business
|| ' '
|| a.data_source
|| ' '
|| a.frequency
|| ' '
|| a.case_symbol
)
) AS display_name,
SUBSTR (( a.business
|| '_'
|| a.data_source
|| '_'
|| a.frequency
|| (CASE
WHEN a.case_symbol IS NULL
THEN ''
ELSE '_' || a.case_symbol
END
)
),
0,
30
) AS summary_schema_name,
(SELECT ef.frequency_name
FROM etl_frequencies@etlmgr_srv_ubatchh_lx ef
WHERE ef.frequency = a.frequency) data_frequency_name,
a.case_symbol subset_key, '' subset_name
FROM (SELECT DISTINCT ebdf.business, ebdf.data_source, ebdf.frequency,
c.case_symbol
FROM etl_bus_datasrc_frequencies@etlmgr_srv_ubatchh_lx ebdf INNER JOIN etl_rulesets@etlmgr_srv_ubatchh_lx er
ON ( ebdf.business = er.business
AND ebdf.data_source = er.data_source
AND ebdf.frequency = er.frequency
)
LEFT OUTER JOINe etl_db_output_fact_rules@etlmgr_srv_ubatchh_lx r
ON er.ruleset_id = r.ruleset_id
LEFT OUTER JOIN etl_db_output_fact_cases@etlmgr_srv_ubatchh_lx c
ON r.db_output_fact_rule_id =
c.db_output_fact_rule_id
MINUS
SELECT c.business_unit_key, e.data_source_key, f.data_frequency_key,
g.data_source_subset
FROM tb_module_summary_schema a INNER JOIN tb_module b
ON a.module = b.module
INNER JOIN tb_business_unit c
ON b.business_unit_id = c.business_unit_id
INNER JOIN tb_summary_source_type d
ON a.summary_source_type_id = d.summary_source_type_id
INNER JOIN tb_data_source e
ON d.data_source_id = e.data_source_id
INNER JOIN tb_data_frequency f
ON d.data_frequency_id = f.data_frequency_id
LEFT OUTER JOIN tb_data_source_subset g
ON d.data_source_subset_id = g.data_source_subset_id
) a
ORDER BY a.business, a.data_source, a.frequency, a.case_symbol
【问题讨论】:
那就是except
将minus
改为except
关键字后,在Oracle 中无法继续运行此查询,您真正遇到了什么问题?
EXCEPT 在 Oracle 中不起作用,因此如果您希望它符合 ANSI SQL 并在 Oracle 中运行,您必须使用“NOT EXISTS”或“NOT IN”构造重写查询
我希望此查询与 ANSI SQL 92 兼容,但 MINUS 关键字对我来说是一个障碍。
让我们澄清一下,您不希望此查询在 Oracle 中可执行,您希望此查询与 ANSI-92 标准兼容,或者您希望重写此查询以与 ANSI-兼容92并且要在Oracle中执行,你需要什么?
【参考方案1】:
查看外连接
Doing INTERSECT and MINUS in MySQL
【讨论】:
链接失效【参考方案2】:select <columns>
from (
select 'SRC' as data_source, <columns>
from source_table
union all
select 'TRG' as data_source, <columns>
from target_table
)
group by <columns>
having max(data_source) = 'SRC';
【讨论】:
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