如何修復錯誤 - 操作數類型沖突：日期與 int 不兼容

Question

INSERT INTO Buy
SELECT Title
    ,Type1
    ,Tedat
    ,DATEADD(DAY, - 2, DATEADD(YEAR, - 1, Tarikh))
    ,Descrip
FROM Buy
WHERE (
    Tarikh BETWEEN 2019-03-21
    AND 2020-03-19
)

Answer 1

您需要將日期用引號括起來，因為如果沒有它們，它們將被評估為一系列整數，這與WHERE子句中的日期無法比較：

INSERT INTO Buy 
SELECT      Title,
            Type1,
            Tedat,
            DATEADD(DAY,-2,DATEADD(YEAR,-1,Tarikh)),
            Descrip 
FROM        Buy
WHERE       Tarikh BETWEEN '2019-03-21' AND '2020-03-19'

Answer 2

您缺少日期的引號

 INSERT INTO Buy SELECT  Title,Type1,Tedat,DATEADD(DAY,-2,DATEADD(YEAR,-1,Tarikh)),Descrip FROM Buy
                                WHERE(Tarikh BETWEEN '2019-03-21' AND '2020-03-19' )

Answer 3

您需要將日期用引號括起來，例如'2019-03-21'而不是2019 - 03 - 21

INSERT INTO Buy
SELECT Title
    ,Type1
    ,Tedat
    ,DATEADD(DAY, -2, DATEADD(YEAR, -1, Tarikh))
    ,Descrip
FROM Buy
WHERE Tarikh BETWEEN '2019-03-21' AND '2020-03-19'

此外，您應該指定列以避免意外錯誤（插入不正確的列或只想插入多個列而不是所有列）

INSERT INTO Buy(column1, column2,.. )
SELECT  Title, Tedat, .. 
FROM    Buy

閱讀以下帖子以更好地理解

插入某些列