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Asked: 2026-05-27T20:26:05+00:00

Can you please help me know what maybe the error in my sql? I’m

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Can you please help me know what maybe the error in my sql?
I’m having missing expression error but I cannot find the error.
Thank you very much in advance.

SELECT SYSTEMNAME, round(MAX(GBL_CPU_TOTAL_UTIL),2) AS AVE_CPU,
convert(varchar(20),DATEADD(hour, DATEDIFF(hour, 0, DATETIME), 0),110) AS DATE
FROM dbo.[GLOBAL]
WHERE (SYSTEMNAME IN ( 'X1','X2','X3'))    
AND (DATETIME > DATEADD(month, - 24, GETDATE()))
AND (DATETIME BETWEEN '12-27-2011 00:00' AND '12-30-2011 00:00')
GROUP BY SYSTEMNAME, convert(varchar(20),
DATEADD(hour, DATEDIFF(hour, 0, DATETIME), 0),110)
ORDER BY DATE

Error:

ORA-00936: missing expression
00936. 00000 -  "missing expression"
*Cause:    
*Action:
Error at Line: 2 Column: 9
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1 Answer

  1. Editorial Team

    convert(varchar(20), ... ?

    As far as I know, convert is used to convert a string from one character set to another. varchar(20) is not a string. This is also likely to be the case since that “line 2, column 9” is exactly where the varchar(20) is.

    The doco for convert states:

    convert( string1 , char_set_to , [ char_set_from ] )
    string1 is the string to be converted.
    char_set_to is the character set to convert to.
    char_set_from is the character set to convert from.

    If your intent is to cast the date difference to a varchar(20) type, you should probably be using cast.

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