Data selection in UDB where columns were named after the oracle data types

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• Where discoverer reports stored in the oracle database

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  Respect of
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  Hello

  Oracle version: 12.1.0.1.0 - 64 bit

                    OS:   Fedora Core 17 X86_64

  My question is about the conservation of fields (hour, minute, second) time DATE type in the array on NLS_DATE_FORMAT changes.

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  DATEVAL
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  SQL>
  

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  Accordingly, while comparing this with the literal '2014' (which based on the new value of NLS_DATE_FORMAT = "yyyy" is implicitly converted to DATE), shouldn't the above query returns the line 2014-01-01 10:00 ?

  I mean, I changed the NLS_DATE_FORMAT but data from time in the table fields are preserved and that's why they should normally be taken into account in the comparison of date.

  What I'm trying to say is that for me (Please correct me if I'm wrong), no matter what NLS_DATE_FORMAT configuration is the following test

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  evolves normally true (beucase of TIME = 10 on the left side of the test) and therefore this line must be returned which is not the case in the test above.

  You kindly could you tell me what I misunderstood?

  Thanks in advance,

  This is the price for the use of implicit conversions. Implicit DATE conversion rules are not as direct as it can be assumed. In your case, all you provide is year as date format. In this case date implicit conversion rules assumes that month in the current month, day 1 and time as 00:00:00.

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  Modified session.

  SQL > select to_char (to_date ('2014 "), ' mm/dd/yyyy hh24:mi:ss') twice;

  TO_CHAR (TO_DATE('20)
  -------------------
  01/08/2014-00:00:00

  SQL >

  So, when you start:

  Select * from tmptab where dateval > '2014 '.

  Oracle implicitly converts date using "YYYY", which translates as August 1, 2014 '2014'. That's why your quesry returns no rows.

  SY.

• Impact on performance when you use the LONG data type

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• Select only records where the column values are not all equal to zero

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  select 'Type 1' as itemtype, 'FEB' as monthname, 1 as theval from dual union all
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  select 'Type 1' as itemtype, 'APR' as monthname, 1 as theval from dual union all
  select 'Type 1' as itemtype, 'MAY' as monthname, 4 as theval from dual union all
  select 'Type 1' as itemtype, 'JUL' as monthname, 0 as theval from dual union all
  select 'Type 1' as itemtype, 'AUG' as monthname, 0 as theval from dual union all
  select 'Type 1' as itemtype, 'SEP' as monthname, 1 as theval from dual union all
  select 'Type 1' as itemtype, 'OCT' as monthname, 7 as theval from dual union all
  select 'Type 1' as itemtype, 'NOV' as monthname, 1 as theval from dual union all
  select 'Type 1' as itemtype, 'DEC' as monthname, 2 as theval from dual union all
  
  select 'Type 2' as itemtype, 'JAN' as monthname, 0 as theval from dual union all
  select 'Type 2' as itemtype, 'FEB' as monthname, 0 as theval from dual union all
  select 'Type 2' as itemtype, 'MAR' as monthname, 0 as theval from dual union all
  select 'Type 2' as itemtype, 'APR' as monthname, 0 as theval from dual union all
  select 'Type 2' as itemtype, 'MAY' as monthname, 0 as theval from dual union all
  select 'Type 2' as itemtype, 'OCT' as monthname, 0 as theval from dual union all
  select 'Type 2' as itemtype, 'NOV' as monthname, 0 as theval from dual union all
  select 'Type 2' as itemtype, 'DEC' as monthname, 0 as theval from dual
  )
  select
    itemtype,
    sum (case monthname when 'JAN' then theval else 0 end) as JAN,
    sum (case monthname when 'FEB' then theval else 0 end) as FEB,
    sum (case monthname when 'MAR' then theval else 0 end) as MAR,
    sum (case monthname when 'APR' then theval else 0 end) as APR,
    sum (case monthname when 'MAY' then theval else 0 end) as MAY,
    sum (case monthname when 'JUN' then theval else 0 end) as JUN,
    sum (case monthname when 'JUL' then theval else 0 end) as JUL,
    sum (case monthname when 'AUG' then theval else 0 end) as AUG,
    sum (case monthname when 'SEP' then theval else 0 end) as SEP,
    sum (case monthname when 'OCT' then theval else 0 end) as OCT,
    sum (case monthname when 'NOV' then theval else 0 end) as NOV,
    sum (case monthname when 'DEC' then theval else 0 end) as DEC
  from mytable
  group by itemtype
  order by itemtype

  I need an external application around it or something which will select only 'Type 1'... that is, if all months are each equal to zero, do not include the record in the result set.
  
  In summary to get a total of zero is not an option, because I could have-15 and + 15 in different columns, in which case, the recording should be displayed.
  
  Something as simple as... 'not the case (oct = 0 and 0 nov and dec = 0...) at the end is all it seems to me necessary. I thought to add a case for each column clause, but that seems not very effective. Ideas?
  
  Thanks in advance!
  Mark
  
  Edit... I know not what follows will work using the MINUS operator, but my actual query is really huge, and I don't want to have to write it twice...
  {code}
  Select
  ItemType,
  sum (case monthname when "JAN" then Val else 0 end) such as JAN,.
  sum (case when monthname 'FEB', then Val 0 otherwise end) by Feb.
  sum (case when monthname 'MAR', then Val 0 otherwise end) like MARS,
  sum (case monthname when "APR" then Val else 0 end) as APR.
  sum (case when monthname 'MAY', then Val else 0 end) either.
  sum (case when monthname "JUN", then Val 0 otherwise end) as JUN.
  sum (case monthname when "JUL" then Val else 0 end) as JUL,.
  sum (case monthname when "AUG" then Val else 0 end) as AUG.
  sum (case monthname when "MS" then Val else 0 end) as MS.
  sum (case monthname when "OCTS" then Val else 0 end) OCT.
  sum (case monthname when "NOV" then Val else 0 end) as NOV.
  sum (case monthname when 'DEC' then Val else 0 end) as DEC
  FROM MyTable
  Group of itemtype
  
  less
  
  Select
  ItemType,
  Jan, Feb, mar, Apr, may, June, July, August, Sept, oct, nov, dec
  de)
  Select
  ItemType,
  sum (case monthname when "JAN" then Val else 0 end) such as JAN,.
  sum (case when monthname 'FEB', then Val 0 otherwise end) by Feb.
  sum (case when monthname 'MAR', then Val 0 otherwise end) like MARS,
  sum (case monthname when "APR" then Val else 0 end) as APR.
  sum (case when monthname 'MAY', then Val else 0 end) either.
  sum (case when monthname "JUN", then Val 0 otherwise end) as JUN.
  sum (case monthname when "JUL" then Val else 0 end) as JUL,.
  sum (case monthname when "AUG" then Val else 0 end) as AUG.
  sum (case monthname when "MS" then Val else 0 end) as MS.
  sum (case monthname when "OCTS" then Val else 0 end) OCT.
  sum (case monthname when "NOV" then Val else 0 end) as NOV.
  sum (case monthname when 'DEC' then Val else 0 end) as DEC
  FROM MyTable
  Group of itemtype
  )
  where (oct = 0 & nov = 0 and dec = 0 and jan = 0 and 0 = Feb and mar = 0
  apr = 0 and may = 0 and = 0 jun and Jul = 0 and aug = 0 and Ms = 0
  )
  order of itemtype
  {code}
  
  Change again... OK, I guess that I am answering my own question here, but I think that by using a WITH to write the main request once clause and then selecting * twice using the MINUS operator between where the second query is where (oct = 0, etc.) is what I need. If anyone has better suggestions, please let me know! Here's the logic of nickname for what I come up with to date...
  
  {code}
  WITH mainquery as (select all)
  Select * from mainquery
  less
  Select * from mainquery where (oct = 0, nov = 0, etc...)
  {code}
  
  Thanks again!
  Mark
  
  Published by: user455268 on March 1, 2012 19:13
  
  Published by: user455268 on March 1, 2012 19:16

  Hello

  You can do it with a HAVING clause:

  select
    itemtype,
    sum (case monthname when 'JAN' then theval else 0 end) as JAN,
    sum (case monthname when 'FEB' then theval else 0 end) as FEB,
    sum (case monthname when 'MAR' then theval else 0 end) as MAR,
    sum (case monthname when 'APR' then theval else 0 end) as APR,
    sum (case monthname when 'MAY' then theval else 0 end) as MAY,
    sum (case monthname when 'JUN' then theval else 0 end) as JUN,
    sum (case monthname when 'JUL' then theval else 0 end) as JUL,
    sum (case monthname when 'AUG' then theval else 0 end) as AUG,
    sum (case monthname when 'SEP' then theval else 0 end) as SEP,
    sum (case monthname when 'OCT' then theval else 0 end) as OCT,
    sum (case monthname when 'NOV' then theval else 0 end) as NOV,
    sum (case monthname when 'DEC' then theval else 0 end) as DEC
  from mytable
  group by itemtype
  HAVING      MIN (theval)     != 0
  OR      MAX (theval)     != 0
  order by itemtype
  ;
  

  If the values are all 0, then the MIN and MAX will be 0.
  If the MIN or MAX is not 0, the values are all 0.

  This assumes that the combination (itemtype, monthname) is unique, because it is in your sample data.
  If this is not the case, start with a subquery that GROUPs BY itemtype, monthname, so that when you get to the main request, this combination will be unique.