相当于MySQL的ISDATE() [英] ISDATE() equivalent for MySQL
本文介绍了相当于MySQL的ISDATE()的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一行用于SQL Server的代码,其日期列为"YYYYMMDD",其中DD为00,并将00转换为01,以便它与datetime一起使用.我希望能够使用MySQL
I have a line of code for SQL server which takes a date listed as "YYYYMMDD" where the DD is 00 and converts the 00 to 01 so that it works with datetime. I would like to be able to use MySQL for it
适用于SQL Server的当前代码:
the current code which works for SQL server:
INSERT patentdb.Citation(PatentNo, Citation, CitedBy, CitationDate)
SELECT PatentNo, citation, WhoCitedThis, dt
FROM
(
SELECT PatentNo, Citation, WhoCitedThis, dt = CASE
WHEN CitationDate LIKE '%00' THEN INSERT (CitationDate, 8, 1, '1')
ELSE CitationDate
END
FROM patentdb.CitationSource
) AS x
WHERE ISDATE(dt) = 1;
但是isdate在MySQL中无效,该怎么解决?
but isdate is not valid in MySQL, what can I do to fix this?
推荐答案
You can try using the STR_TO_DATE function. It returns null
if the expression is not date, time, or datetime.
WHERE STR_TO_DATE(dt, '%d,%m,%Y') IS NOT NULL
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