0
我正在写一个sql查询,我需要将varchar列值转换为日期,并在where子句中使用它。错误比较日期在oracle sql查询
以下是我正在尝试的查询;
SELECT *
FROM
(SELECT DISTINCT t1.record_id,
t1.column_name,
t1.value,
t1.row_index,
t1.start_date,
t1.end_date,
t2.value AS val
FROM sf_monthly_fin_exp t1,
sf_monthly_fin_exp t2
WHERE t1.row_index = t2.row_index
AND t1.generated_report_id = t2.generated_report_id
AND t1.generated_report_id =11700
AND t2.column_name = 'Date'
AND t2.value <> 'Total'
AND t1.column_name = 'xyz'
ORDER BY t1.row_index
)
WHERE TO_DATE(val, 'dd/mm/YYYY') = TO_DATE('05/01/2014', 'dd/mm/YYYY');
我将值转换为日期类型,而比较它却给我以下错误;
ORA-01858: a non-numeric character was found where a numeric was expected
01858. 00000 - a non-numeric character was found where a numeric was expected.
我在做什么错误的查询,任何帮助将不胜感激。
但是,为什么你存储日期varchar列? – jarlh
提供样本数据。你应该首先解决你的设计问题。将日期存储为字符串是非常糟糕的设计。使用适当的数据类型。 –
这个表是一种键值对,它存储了许多种类的值之一是Date,其中列名是Date,值是某个日期值存储为varcher。 – varun