i need to perform an operation (in this case DATEDIFF()) on 2 dates. But at least one of those dates is incomplete.
例如,DATEDIF (2010-01-00 , 2010-02-01 ) OR DATEDIF (2010-01-00 , 2010-02-00 )将返回NULL。
事实上,在,该手册称,DAIF可处理不完整的日期,因为所有计算功能的日期。
诚然,don不希望改变我的数据库,而且确实需要这样做,你们是否知道这样做的方法,这是一个trick滴吗?
I ask in general even if my actual issue is to perform this DATEDIF.
您可使用红十字与红新月联会和基督徒废除酷刑行动国际联合会来检查不完整的日期,并以01取代00。
IF ( isnull(CONCAT(v6.title,v7.title,v8.title)), IF ( isnull(CONCAT(v7.title,v8.title)), v8.title,
CONCAT(v7.title, . ,v8.title) ),
CONCAT(v6.title, . ,v7.title, . ,v8.title) ) AS "Datum",
IF ( isnull(CONCAT(v9.title,v10.title)) & isnull(CONCAT(v11.title, v12.title)), v13.title,
IF ( isnull(CONCAT(v9.title,v10.title)) & isnull(v13.title), CONCAT(v11.title, - , v12.title),
IF ( isnull(CONCAT(v11.title,v12.title)) & isnull(v13.title), CONCAT(v9.title, : , v10.title, Uhr ),
"Hello World" ) ) ) AS "Uhrzeit",
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