crystal-reports - Crystal Report converted from Data Flex to SQL now getting formula errors

Question

Here is my formula:

if Maximum({@tx plan date}, {CDCLIENT.SORT_NAME})=Date (1999-01-01) then 
  currentdate-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME}) 
else 
  Maximum ({@tx plan date}, {CDCLIENT.SORT_NAME})-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME})

The above formula is now getting a string is required error on the field =Date(1999-01-01) part. I don't seem to be able to figure what is needed

Answer 1

使用任一：

if Maximum({@tx plan date}, {CDCLIENT.SORT_NAME})=Date(1999,01,01) then 
  currentdate-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME}) 
else 
  Maximum ({@tx plan date}, {CDCLIENT.SORT_NAME})-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME})

或者：

if Maximum({@tx plan date}, {CDCLIENT.SORT_NAME})=DateValue("1999-01-01") then 
  currentdate-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME}) 
else 
  Maximum ({@tx plan date}, {CDCLIENT.SORT_NAME})-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME})

Answer 2

要在 Crystal 报表中声明日期，您可以使用哈希：

Date (#1999-01-01#)

编辑

当您尝试与 s 字符串进行比较时，您需要将字符串转换为日期，反之亦然（可能需要测试和使用日期格式）：

if Maximum({@tx plan date}, {CDCLIENT.SORT_NAME})= "1999-01-01" then ToText(currentdate-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME}),"yyyy-MM-dd") else 
Date(Maximum ({@tx plan date}, {CDCLIENT.SORT_NAME}))-Maximum ({CDASSFRM.DATE_EFFECTIVE}, {CDCLIENT.SORT_NAME})