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SQLServer で TEXT型(yyyyMMddHHmmss) を日付型に変換する

Posted at

SQLServer のデータをVB.net で select , Delete する際に

create_dtm,update_dtm がテキスト型だったため、過去日付のデータを狙って削除する、ということにひと手間必要でした。

その覚書き。


delete from 'テーブル名'"                              
where convert(DateTime,stuff(stuff(stuff(update_dtm, 9, 0, ' '), 12, 0, ':'),15, 0, ':'))

と、記述することによりテキスト型のdtmを日付型に変換。

仮に1年以上前の場合削除、といった条件をつける場合は、


delete from 'テーブル名'"                              
where convert(DateTime,stuff(stuff(stuff(update_dtm, 9, 0, ' '), 12, 0, ':'),15, 0, ':')) <= (select DATEADD(month,(-13), GETDATE()))

というイメージになる。

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