I'm getting a divide by zero error when performing the below code. I have tried a NULLIF after the ELSE, but I am encountering the same error message:
SELECT
country_IBS
, Sku
, LTM_Sales_USD
, PTM_Sales_USD
, LTM_Cost_USD
, (CASE WHEN -([LTM_Sales_USD]-[PTM_Sales_USD])/([LTM_Sales_USD]+[PTM_Sales_USD]) IS NULL
THEN 0
ELSE -([LTM_Sales_USD]-[PTM_Sales_USD])/([LTM_Sales_USD]+[PTM_Sales_USD]) END +1)/2 AS "Sales Growth % (scaled)"
FROM #tempSalesChange
Wrap the divider in the NULLIF:
{Expression 1} / NULLIF({Expression 2},0)
That will mean that if the divider is 0 then NULL will be returned, and the divide by zero error will be avoided.
In your case, that's ([LTM_Sales_USD]+[PTM_Sales_USD]).
If suspect that you want:
(1 - ([LTM_Sales_USD] - [PTM_Sales_USD]) / NULLIF([LTM_Sales_USD] + [PTM_Sales_USD], 0)
) / 2 AS [Sales Growth % (scaled)]
That is: the divisor should be wrap in NULLIF(..., 0). This avoids the division by zero error - in that case, the whole computation returns NULL instead.
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.
Hi can any one say me how to write query in sql server management studio for statement =>if(isnull("GROSS_SF")=1 or "GROSS_SF"=0,0,"GROSS_SALES"/"GROSS_SF")
by using case statement :
CASE
WHEN ("GROSS_SF"=1 or "GROSS_SF"=0) isnull then 0
else "GROSS_SALES"/"GROSS_SF"
end/* i am getting error if i write it like this */
thanks in advance
If you want to avoid a divide by zero, while at the same time also handling NULL, then you may try the following logic:
CASE WHEN COALESCE(GROSS_SF, 0) = 0
THEN 0
ELSE GROSS_SALES / GROSS_SF END AS output
To be clear, the above logic would return a zero value should either the GROSS_SF be zero or NULL.
I think what are you looking for is IFNULL, look here https://www.w3schools.com/sql/sql_isnull.asp
You are close. You can do:
(CASE WHEN "GROSS_SF" IS NULL OR "GROSS_SF" = 0 THEN 0
ELSE "GROSS_SALES" / "GROSS_SF"
END)
In SQL, divide by zero errors are often avoided using NULLIF():
"GROSS_SALES" / NULLIF("GROSS_SF", 0)
However, that returns NULL rather than 0. If you really want zero:
COALESCE("GROSS_SALES" / NULLIF("GROSS_SF", 0), 0)
This is a bit shorter to write and almost equivalent to your version (this returns 0 if "GROSS_SALES" is NULL, which your version does not).
You can use NULLIF() to prevent arithmetic divide by zero errors :
select . . . ,
GROSS_SALES / nullif(GROSS_SF, 0)
from table t;
However, this would return null instead of error, if you want to display 0 instead then you need to use isnull() (MS SQL Specific) or coalesce() (SQL Standard).
So, you can express it :
select . . . ,
isnull(GROSS_SALES / nullif(GROSS_SF, 0), 0)
from table t;
I was getting a divide by 0 error with this code:
CASE
WHEN DENOMINATOR >= 0
THEN SUM(INT1 * INT2 / DENOMINATOR)
ELSE 0
END AS RATIO
However when I changed to the following code, it worked.
CASE
WHEN DENOMINATOR >= 0
THEN SUM(INT1) * INT2 / DENOMINATOR
ELSE 0
END AS RATIO
Could someone help me understand the reason so I can avoid this in the future? BTW, the first sample worked in Vertica. I realize summing just what needs to be summed rather than doing the calculation before the summation is a better programming practice. However still am curious.
I think the best way to avoid divide-by-zero is to use nullif():
SUM(INT1 * INT2 / NULLIF(DENOMINATOR, 0))
or:
SUM(INT1) * INT2 / NULLIF(DENOMINATOR, 0)
This returns NULL, which I find more sensible for a divide-by-zero situation. You can add COALESCE() to get 0, if you like.
cast(CAST(countAta AS float)
/ CAST(DATEDIFF(day,#searchDate,#EndDate) AS float) as decimal(16,2)
)
You can avoid such situations by setting the following parameters before your query and it should work just fine.
SET ARITHABORT OFF
SET ANSI_WARNINGS OFF
This would return a NULL when you do something like this: 123 / 0
The important point is to set these properties back ON once you are done with such operations. This particularly helps when you have complex queries in your Stored procedure and you don't want to end up writing more and more CASE statements to handle such a situation.
You should always use TRY-CATCH block and use the built-in error handling functions provided by SQL. Also, you can handle it in another way --
SELECT CASE
WHEN (CAST(DATEDIFF(Day, #searchDate, #EndDate) AS FLOAT) AS DECIMAL(16, 2)) = 0
THEN NULL -- Ideally it should return NULL but you can change it as per your requirement
ELSE CAST(CAST(Counter AS FLOAT) / CAST(DATEDIFF(Day, #searchDate, #EndDate) AS FLOAT) AS DECIMAL(16, 2))
END
The best way is NULLIF() . . . but you can't turn the value back into a 0:
select CAST(CAST(countAta AS float) /
NULLIF(DATEDIFF(day, #searchDate, #EndDate), 0
) as decimal(16, 2)
)
This returns NULL if the denominator is 0. Note that you don't have to cast to a float twice.
You could use NULLIF to avoid devided by zero error.
It returns NULL when denominator equals 0
CAST(countAta AS decimal(16,2)) /ISNULL(NULLIF(DATEDIFF(day,#searchDate,#EndDate),0), 1)
Or use CASE WHEN
CAST(countAta AS decimal(16,2)) /
CASE WHEN DATEDIFF(day,#searchDate,#EndDate) = 0 THEN 1
ELSE DATEDIFF(day,#searchDate,#EndDate)
END
I have this query that i get errors when data gets loaded to this table and the divisor is zero which is the b. living_units column. I want to know if I can do some sort of try catch or if its zero to show null instead of failing or something that will help not error out?
SELECT a.SERVICE_TYPE_GRP,
a.HSIA_TYPE,
a.STAT_DYN_IND,
a.VIDEO_IND,
a.VOICE_IND,
a.CUST_CNT,
b.LIVING_UNIT_CNT,
a.DT_MODIFIED,
a.CUST_CNT / b.LIVING_UNIT_CNT AS ALLRGN_TK_RT_PCT
FROM ( SELECT lp.SERVICE_TYPE_GRP SERVICE_TYPE_GRP,
lp.HSIA_TYPE HSIA_TYPE,
lp.STAT_DYN_IND STAT_DYN_IND,
lp.VIDEO_IND VIDEO_IND,
lp.VOICE_IND VOICE_IND,
lp.DT_MODIFIED DT_MODIFIED,
SUM (lp.CUST_CNT) CUST_CNT
FROM RPT_SUBSCR_REGION_DTL lp
GROUP BY SERVICE_TYPE_GRP,
HSIA_TYPE,
STAT_DYN_IND,
VIDEO_IND,
VOICE_IND,
DT_MODIFIED) a,
( SELECT DT_MODIFIED, SUM (LIVING_UNIT_CNT) LIVING_UNIT_CNT
FROM RPT_REGION_CUST_DTL
WHERE dt_modified = (SELECT dt_modified
FROM ls_dt_modified
WHERE NAME = 'RPT_REGION_CUST_DTL')
GROUP BY DT_MODIFIED) b
WHERE a.DT_MODIFIED = b.DT_MODIFIED;
The error i get is ORA-01476: divisor is equal to zero.
If you have a complex divisor expression and a NULL result is acceptable, there is an alternative that does not require repeating the divisor expression:
a.CUST_CNT / nullif(b.LIVING_UNIT_CNT, 0)
The NULLIF function returns NULL if the first parameter is equal to the second parameter. In this case it returns NULL if b.LIVING_UNIT_CNT is equal to zero. And anything divided by NULL also becomes NULL. It's a bit of a "trick" maybe, but it saves the expression repetition of the CASE statement.
Try a case statement:
case
when b.LIVING_UNIT_CNT = 0 -- the divisor
then 0 -- a default value
else a.CUST_CNT / b.LIVING_UNIT_CNT
end
ALLRGN_TK_RT_PCT