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截斷或拆分
我有一個很大的數據集,我想在新列中拆分前7個字符。 我正在嘗試使用left函數,但出現錯誤。
數據表
回复:截斷或拆分
嘗試
left( char( :event_time ), 7 )
我猜你的event_time列是數字
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