Operand type clash: int is incompatible with date

Question

Post reply

Operand type clash: int is incompatible with date

sqlbidev

Ten Centuries

Points: 1195
More actions
July 3, 2015 at 3:33 am

#318656

Hello, i have been trying to solve this for sometime but i cant get around it. hopefully somebody can help me out here.
this is a piece of my code:
SELECT TOP 1000 *...
case when Rownum<= datediff(day, salesdate, baseenddate)
then DATEADD(mm, RowNum, salesdate) /*error at this point*/
else 0 end as subscriptionrowdate
FROM Subsrow
Rownum is an integer type. DATEADD is the part when the error is but i dont know how to convert this to int 🙁
Any suggestions?

Viewing 5 posts - 1 through 4 (of 4 total)

You must be logged in to reply to this topic. Login to reply

sqlbidev Ten Centuries Points: 1195 More actions · Answer 1

I got it working!

DATEADD(mm, RowNum, convert(VARCHAR(10),salesdate,112))

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 2

mandania (7/3/2015)
Hello, i have been trying to solve this for sometime but i cant get around it. hopefully somebody can help me out here.
this is a piece of my code:
SELECT TOP 1000 *...
case when Rownum<= datediff(day, salesdate, baseenddate)
then DATEADD(mm, RowNum, salesdate) /*error at this point*/
else 0 end as subscriptionrowdate
FROM Subsrow
Rownum is an integer type. DATEADD is the part when the error is but i dont know how to convert this to int 🙁
Any suggestions?

What datatype are salesdate and baseenddate?

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

sqlbidev Ten Centuries Points: 1195 More actions · Answer 3

sqlbidev

Ten Centuries

Points: 1195

July 3, 2015 at 6:35 am

#1810198

they are both date type

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 4

mandania (7/3/2015)
they are both date type

Here's your error:

case

when Rownum<= datediff(day, salesdate, baseenddate) then DATEADD(mm, RowNum, salesdate)

else 0 end

You have two different datatypes returned by your CASE. Since date datatypes (returned by DATEADD) have a higher datatype precedence than INT, the ELSE condition will be changed to this:

else CAST(0 AS <<a date datatype>>) end

- which will fail with a DATE datatype but work with a DATETIME datatype.

The return datatype of DATEADD is the same as the date parameter passed in. If it's a DATE, as you confirm, then you get the error. When you pass a string into DATEADD the return datatype is DATETIME, and you don't get an error.

The solution?

Change ELSE 0 END

to ELSE <<a valid date of your choice, or NULL>> END.

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden