rom_date column is datetime format-----temptable1stockdetails.
gradd19 column is varchar format------gradeddetails
to insert gradd19 value to from_date. but error came.plase tell.
EDIT the code taken from OP's comment:
insert into TempTable1STOCKDETAILS (PRODUCT_NO,PRODUCT_NAME,AC_NO,FROM_DATE,QTY_IN,B_F)
SELECT a.PRODUCT_NO PRODUCT_NO
,P.PRODUCT_NAME PRODUCT_NAME
,a.CATEGORY ProductGroup
,CONVERT(VARCHAR(10), gradd19, 105) as ExpiryDate
,(SELECT ISNULL(SUM(QTY_IN),0) FROM GradedDETAILS WHERE CATEGORY=a.CATEGORY AND PRODUCT_NO=A.PRODUCT_NO
AND STOCK_JR IN ('IN','GR','TR','SA','SR','OG','PO','LT')
AND STOCK_DATE BETWEEN '2016-09-01 00:00:00' AND '2016-09-28 00:00:00')
,(SELECT ISNULL(SUM(QTY_IN),0) FROM GradedDETAILS WHERE STOCK_DATE < '2016-09-01 00:00:00'
AND PRODUCT_NO=A.PRODUCT_NO AND CATEGORY=a.CATEGORY )
FROM GradedDETAILS A
inner join PRODUCT P on A.PRODUCT_NO=P.PRODUCT_NO
WHERE a.STOCK_JR IN('IN','GR','TR','SA','SR','OG','PO','LT')
GROUP BY a.PRODUCT_NO,P.PRODUCT_NAME ,a.CATEGORY,a.Gradd19