I am using the following SQL CASE:
SELECT
BomMast.BomStockCode
, BomMast.BomDescription
, CASE
WHEN StkItem.AveUCst <= 0 THEN 'ERROR'
WHEN StkItem.AveUCst > 0 THEN (StkItem.AveUCst * BomComp.ProductionQty)
END AS TotalCost
FROM BomComp
INNER JOIN BomMast
ON BomMast.BomID = BomComp.BomMasterKey
INNER JOIN StkItem
ON StkItem.StockLink = BomComp.ComponentStockLink
But I get the following message:
Msg 8114, Level 16, State 5, Line 2
Error converting data type varchar to float.
Am I not allowed to add test within the CASE statement?
Thank you!
Change your query to:
SELECT BomMast.BomStockCode
,BomMast.BomDescription
,CASE
WHEN StkItem.AveUCst <= 0
THEN 'ERROR'
WHEN StkItem.AveUCst > 0
THEN CAST((StkItem.AveUCst * BomComp.ProductionQty) AS NVARCHAR(MAX))
END AS TotalCost
FROM BomComp
INNER JOIN BomMast ON BomMast.BomID = BomComp.BomMasterKey
INNER JOIN StkItem ON StkItem.StockLink = BomComp.ComponentStockLink
The datatypes of the values you want to show in either branches of your CASE statements need to be the same in order to work.
Edit:
After #underscore_d's suggestion, I also consider that it would be a far better option to display NULL instead of the message ERROR and then handle this NULL value in the application level.
Hence, your case statement will change to:
CASE
WHEN StkItem.AveUCst <= 0
THEN NULL
WHEN StkItem.AveUCst > 0
THEN (StkItem.AveUCst * BomComp.ProductionQty)
END AS TotalCost
Yes, text can be used as the result a case statement, as can any datatype, but each case must return the same type, as the results column must have one type only.
Your [TotalCost] column has conflicting data types. [StkItem.AveUCst] is a float and the literal value of 'ERROR' is a varchar. If you are intending to retain the benefits of number-based value in your results column, consider replacing 'ERROR' with the SQL keyword NULL.
Your column TotalCost (neither any other column) can be a type-mixture. In first case it would be a varchar, in second case it would be floator something like that. THAT IS NOT POSSIBLE.
Related
I keep getting the following error message:
Msg 8134, Level 16, State 1, Line 1 Divide by zero error encountered.
I've seen some posts about using IFNULL which I have tried.
For example:
,Case when a.DiscountReasonCode = 'RL' then IFNULL(((a.ORIGINALRETAIL-a.RetOne) / (a.ORIGINALRETAIL) * 100),0) end as [PctSB]
But this returns the following error:
'IFNULL' is not a recognized built-in function name.
What I'm doing is trying to calculate the proper sales percent and then find and compare it to what is already in the table to find errors or missing Sales %'s.
I'm not sure where I'm going wrong but any help would be greatly appreciated.
SELECT
a.packnum
,a.description
,a.CatID
,a.PctSavings
,Case when a.DiscountReasonCode = 'RL' then (a.ORIGINALRETAIL-a.RetOne) / (a.ORIGINALRETAIL) * 100
end as [PctSB]
FROM PIC704Current a Join CatalogInfo b ON (a.CatID = b.Catalog) and (a.Year = b.MailYear)
WHERE
b.MediaId in('CAT Catalog','SCAT Sale Catalog','SSTF Sale Statement Stuff','STUF Statement
Stuffer','PKG Package Insert','SPKG Sale Pkg Insert')
and a.DiscountReasonCode = 'RL'
and a.year >='2020'
and (Case when a.PctSavings <> (a.ORIGINALRETAIL-a.RetOne)/a.ORIGINALRETAIL*100 then 'False' else
'True' END) = 'False'
Thanks
Wrapping a divide in a null test will not get rid of the divide by 0 error. Instead, you need to check whether the value being divided by is 0 and return a different value instead. You can do this using IIF:
IIF(a.ORIGINALRETAIL = 0, 0, 100.0 * (a.ORIGINALRETAIL-a.RetOne) / a.ORIGINALRETAIL)
You can use coalesce or isnull . MySQL uses ifnull
case
when a.DiscountReasonCode = 'RL' then (a.ORIGINALRETAIL-a.RetOne) /
NULLIF(a.ORIGINALRETAIL, 0) * 100
end as [PctSB]
Msg 8134, Level 16, State 1, Line 1 Divide by zero error encountered.
This error suggests that your denominator is 0 so you can change it to NULL using a case expression.
'IFNULL' is not a recognized built-in function name.
In SQL Server , you can use ISNULL or Coalesce
CASE WHEN a.DiscountReasonCode = 'RL'
THEN ISNULL(((a.ORIGINALRETAIL-a.RetOne)/(CASE WHEN a.ORIGINALRETAIL = 0
THEN NULL
ELSE a.ORIGINALRETAIL
END) * 100),0)
END AS [PctSB]
I think the posts you've seen mentioning IFNULL might actually have been mentioning NULLIF, you just remembered it the wrong way round. One of the typical tricks to avoid a DIV/0 error in sqlserver:
some_number / NULLIF(other_number_maybe_zero, 0)
If the divisor is 0, it is converted to null, meaning the result is null rather than an error
In standard SQL you can do it too:
some_number / CASE WHEN other_number_maybe_zero = 0 THEN NULL ELSE other_number_maybe_zero END
It's just a bit more wordy
The logic that you want is provided by NULLIF():
(a.ORIGINALRETAIL - a.RetOne) * 100.0 / NULLIF(a.ORIGINALRETAIL, 0)) * 100) as [PctSB]
Using the standard SQL function NULLIF() is the simplest way to do what you want, and I recommend that you write the logic this way. It replaces any 0 value with NULL -- thereby avoiding the divide-by-zero.
I have the a query which looks similar to:
SELECT
s.cola, s.colb, t.colc, t.cold, u.cole, u.colf, u.colg, u.colh, u.coli, u.colj, u.colk, u.coll
FROM table1 s
INNER JOIN table2 t
ON s.colb = t.colc
INNER JOIN table3 u
ON u.colm = t.cold
WHERE cast(s.cola as date) between date '2017-11-06' and date '2017-11-10'
ORDER BY 3
I need to add a new column, called col_new, which is to be filled by either u.colm or u.coln. This column will have values from u.colm if that column starts with a number. Otherwise it will have values from u.coln. It is known that either u.coln or u.colm starts with a number, for each entry in table u.
I tried the following query to test if entries starting with a number can be identified or not:
SELECT CASE WHEN ISNUMERIC(SUBSTRING(LTRIM(colm), 1, 1)) = 1
THEN 'yes'
ELSE 'no'
END AS col_new
FROM table_u
It returned the error: Syntax error: expected something between '(' and the 'substring' keyword.
Kindly suggest a solution.
Edit:
Exact Error:
[Teradata Database] [3706] Syntax error: expected something between '(' and the 'substring' keyword.
Instead of isnumeric(), just do a comparison:
SELECT (CASE WHEN LEFT(LTRIM(colm), 1) BETWEEN '0' AND '9' THEN 'yes'
ELSE 'no'
END) AS col_new
FROM table_u;
LEFT() is a convenient shorthand for the first "n" characters of a string.
I'm selecting values from a table. Inside the table there is a column called value. I'm trying to select that value with a 'g' at the end of the value when the value is a number. However, when i try to do this i get the following error (see below).I think this is because i'm using ISNUMERIC, and since the values are either a string representation of a number or the string value 'None' (i know weird, but i have to have this way), i get a convert failure. Anyone know how to fix this issue in SQL Server 2005
Error
Msg 245, Level 16, State 1, Line 1
Conversion failed when converting the varchar value 'None' to data type int.
Query
SELECT a.student_assignment_id,
a.student_id,
a.location_id,
a.assignment_type,
(
Case
WHEN a.assignment_type = 'HW' THEN
CASE a.value
WHEN ISNUMERIC(a.value) THEN RTRIM(a.value)+'g'
ELSE a.value
END
ELSE a.value
END
) as value
,
a.start_date,
a.end_date,
a.course,
a.created_by,
a.creation_date,
a.modified_by,
a.modified_date,
You need to use CASE WHEN ISNUMERIC(a.value) = 1 instead of CASE a.value WHEN ISNUMERIC(a.value)
CASE WHEN a.assignment_type = 'HW'
THEN
CASE WHEN ISNUMERIC(a.value) = 1
THEN RTRIM(a.value)+'g'
ELSE a.value
END
ELSE a.value
END
ISNUMERIC() returns a boolean 0 (not numeric) or 1 (numeric), so your current query is attempting to compare the string a.value to an int (0 or 1)
I have a database table in sql server 2008. My query is breaking for a reason that is unknown to me:
select release_id, url_id,tt_projectid, release_title, tech_area, current_state, dateadd(ss,last_built,'12/31/1969 20:00:00') as recent_Date,
autobuild_count, manualbuild_count, bcm_build_count, config_count, force_count, transition_only_count,
auto_integ_count,last_auto_integ,dateadd(ss,integ_complete_date,'12/31/1969 20:00:00') as integ_date
from tablename
where (auto_integ_count > 0
and MONTH(last_auto_integ) = '1'
and YEAR(last_auto_integ) = '2013')
and (release_id > 36000)
order by release_id desc
The above query works fine, but when I change the last line of the where close from 'and' to 'or' I get this conversion error:
Conversion failed when converting date and/or time from character string.
I'm puzzled as to why changing
'and (release_id > 36000)'
to
'or (release_id > 36000)'
would cause such an error
The reason is because last_auto_integ is being stored as a string rather than as a date. These lines in the where clause are not being executed with the and -- by happenstance -- because none occur when release_id > 360000.
From what I can see, there are no other places in the query where you might be converting a string to a date format.
You can identify these values using:
select last_auto_integ
from tablename
where isdate(last_auto_integ) = 0 and last_auto_integ is not null
You can fix the problem in the query by using case:
where month(case when isdate(last_auto_integ) = 1 then last_auto_integ end) = 1 and
year(case when isdate(last_auto_integ) = 1 then last_auto_integ end) = 2013
Or, you can just use substring() to extract the month and year from whatever date format you are using.
Because when you change AND to OR you are getting a lot more rows returned, and one of these other expressions is failing:
dateadd(ss,integ_complete_date,'12/31/1969 20:00:00')
MONTH(last_auto_integ)
YEAR(last_auto_integ)
With only AND, it doesn't need to evaluate the other expressions for rows whose release_id is <= 36000, so it's not encountering the strings that are causing the problem on date conversion.
SELECT top 1
case
when VR = -99999.99
then 0
else cast((VR*1.732) as decimal(38,3))
end
FROM pseb.dbo.datasource
where FeederID=5003
order by datetime desc
The above query is working fine, but I need to return varchar value '--' instead of returning 0
if I do like that
SELECT top 1
case
when VR = -99999.99
then '--'
else cast((VR*1.732) as decimal(38,3))
end
FROM pseb.dbo.datasource
where FeederID=5003
order by datetime desc
means it returns the following error:
Msg 8114, Level 16, State 5, Line 1 Error converting data type varchar
to numeric.
please help me to solve it
The problem is that you are returning two different data types from the same column. The rule with SQL Server that numeric types take precedence over string types, i.e. in a situation like yours a string gets converted to a number, not the other way around.
So to solve this you can cast your number to a string.
One option is to do something like this:
SELECT top 1
case when VR = -99999.99 then '--'
else
cast
(
cast((VR*1.732) as decimal(38,3)
)
as varchar(50))
end
FROM pseb.dbo.datasource where FeederID=5003 order by datetime desc