Trying to Multiply a Case Statement to a Count - sql

Question

DECLARE #StartDate datetimeoffset,
#EndDate datetimeoffset
SET #StartDate = '2022-03-01 00:00:00.000 +07:00'
SET #EndDate = '2022-03-06 23:59:59.000 +07:00'
SELECT
Records.RecordID,
CONVERT(VARCHAR(10),Records.RecDate AT TIME ZONE 'SE Asia Standard Time',104) AS RecTime,
LocationStr, LocationName,
CONCAT(FirstName,' ',LastName) AS Username ,ProductCodeName,
CASE
WHEN AssetTypeName LIKE '%LTR'
THEN LEFT(AssetTypeName, LEN(AssetTypeName) - 3)
ELSE LEFT(AssetTypeName, LEN(AssetTypeName) - 2)
END * COUNT (ProductCodeName) AS 'SumProduct'
FROM
opendata.records
INNER JOIN
opendata.RecAssets ON Records.RecordId = RecAssets.RecordId
WHERE
(Records.ActionName = 'Fill')
AND (IsDeleted = '0')
AND (Records.RecDate BETWEEN #StartDate and #EndDate)
AND (LocationStr = '3031')
GROUP BY
Records.RecordId, Records.RecDate, LocationStr, LocationName,
CONCAT(FirstName,' ', LastName), ProductCodeName, AssetTypeName
ORDER BY
LocationStr ASC, RecTime ASC, ProductCodeName ASC
Tried to multiply the last to column on my Select statement but failed to do so. I get an error
Conversion failed when converting the ****** value '******' to data type ******.
Furthermore, I tried to convert the case statement to an int but also failed. How can I directly multiply it?

Answer 1

I'm guessing that you're using sql server seeing as it's not oracle and len() is not supported in mySQL or Postgres. You're code calls for an implicit conversion from a numerical value in a char type to a number, for example '123' to 123.
In the following example this doesn't present a problem the first time, but the second time there is a letter in the char value which cannot be converted and throws an error.
I am therefore thinking that you have values of AssetTypeName where there are letters other than in the last 2 characters for non-LTR values of elsewhere in the string for those ending in LTR.
create table test(
AssetTypeName varchar(10),
ProductCodeName int);
insert into test values
('123LTR',1),
('123LTR',1),
('123AB',1);
GO
3 rows affected
select
AssetTypeName,
CASE
WHEN AssetTypeName LIKE '%LTR'
THEN LEFT(AssetTypeName, LEN(AssetTypeName) - 3)
ELSE LEFT(AssetTypeName, LEN(AssetTypeName) - 2)
END * COUNT (ProductCodeName) AS 'SumProduct'
from test
group by AssetTypeName;
GO
AssetTypeName | SumProduct
:------------ | ---------:
123AB | 123
123LTR | 246
insert into test values ('123ABC',1);
GO
1 rows affected
select
AssetTypeName,
CASE
WHEN AssetTypeName LIKE '%LTR'
THEN LEFT(AssetTypeName, LEN(AssetTypeName) - 3)
ELSE LEFT(AssetTypeName, LEN(AssetTypeName) - 2)
END * COUNT (ProductCodeName) AS 'SumProduct'
from test
group by AssetTypeName;
GO
Msg 245 Level 16 State 1 Line 1
Conversion failed when converting the varchar value '123A' to data type int.
db<>fiddle here