Improve a simple select query that uses all the lines.

Similar Questions

• How to filter data according to internal application and in case if returns nothing outside the query must return all the lines

  create table ab (a number, b varchar2 (20));

  Insert into ab

  Select rownum, rownum. "" sample "

  of the double

  connect by level < = 10

  create table bc (a number, b varchar2 (20));

  Insert into BC.

  Select rownum + 1, rownum + 1 | "" sample "

  of the double

  connect by level < = 10

  Select * AB

  where b in (select b BC where b = "2sample")

  This query will return me 1 row, but there are cases where the value of the parameter b is null

  and that it should return all rows in the table

  as

  Select * AB

  where b in (select b BC where b = "2sample")

  which return specific values, but I want to change in a way when the inner query returns nothing then outer query should return all the lines and works as

  Select * AB;

  Is it possible to put in a single query

  Hello

  You seem to ask for different things.  You want all the lines AB when

  1. The parameter ("2sample' in the example) is NULL, or when
  2. There is no corresponding row in the 2 tables (which could happen even if the parameter is not NULL)

  ?

  Assuming you want the option 2, here's one way:

  WITH got_rnk AS

  (

  SELECT ab.*

  DENSE_RANK () (ORDER IN CASE

  WHEN b (IN)

  SELECT b

  BC.

  WHERE b = "2sample" - parameter

  )

  THEN "A".

  OF ANOTHER 'B '.

  END

  ) AS rnk

  AB

  )

  SELECT a, b

  OF got_rnk

  WHERE rnk = 1

  ;

  This does not assume b is unique in each table.

  Thanks for posting the CREATE TABLE and INSERT statements; It is very useful.

• With the family to Apple music subscription, must be the same Apple that use all the devices ID?

  I want to make a family membership at Apple ID, but do not want to use the same identifier Apple on registered devices.

  your question is a bit difficult...

  each device can use their own separate Apple ID but be part of the same family.

• How to write a simple select query to get the data of the table as an XML.

  How to write a simple select query to get the data of the table as an XML. In the query, I'm just adding items below which i need be there in the XML document
  

  select '<test_tag>'||EMP_NAME||'</test_tag>','<date>'||sysdate||'</date>' 
  from temp_table where id_num BETWEEN 1 AND 10;

  I have need to add the root tag as well in the beginning and the end of < root > < / root > this xml file. Please advice if this is possible with the select query
  without using XMLGEN, XMLQUERY or any other packages built and function?

  I need to URL escapes with the UTF-8 code points that we have already achieved using the utl_http package. Please help how to do that without using the utl_http package.

  What is wrong with him?

  At present, the only way I can think of to avoid a call to UTL_HTTP. SET_BODY_CHARSET is to write your own little wrapper.
  In this way, you can specify the Boolean parameter or omit it if you choose to use named parameters:

  SQL> create or replace function my_url_escape (url in varchar2)
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  Function created
  
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  MY_URL_ESCAPE('HTTP://SOME.URI
  --------------------------------------------------------------------------------
  http://some.uri.com/param?lang=fr&text=contr%C3%B4le
   
  

• Problem with select query that includes a date

  I fought with it for about 4 hours - Yes, quite literally... I was never good with stuff to date. I have a brain block.

  In any case, here's the situation:

  I have an Access database that has a date/time field. There is no time, just a date in the format dd/mm/yyyy.

  This table is a list of classes held for three years. I want to do a query that displays only the classes that have completed after January 1st of this year. I don't want to put the 01/01/2010 in the query itself because I want it to work again next year.

  It's the current query:

  < name cfquery = "classes" datasource = "" #DSN # "dbtype ="ODBC">"

  SELECT classesTitles.ClassTitle, classesTitles.ClassDesc, classCatagories.catagoryName, classes.classStart, classes.classEnd, classes.classNotes, owners.fName, owners.lName, classTime.timeSlot, classes.classID, classes.classLimit

  FROM classCatagories INNER JOIN (((classes INNER JOIN classesTitles ON classes.classTitle = classesTitles.classTitleID) INNER JOIN classTime WE classes.classTime = classTime.timeID) INNER JOIN owners WE classes.classInstructor = owners.ownerID) ON classCatagories.catagoryID = classesTitles.ClassType

  WHERE the classes.classEnd < 01/01 / #DatePart ("yyyy", now())) #.

  ORDER BY classes.classStart, classCatagories.catagoryName, classTime.timeSlot, classesTitles.ClassTitle

  < / cfquery >

  I don't get any results, but I should get a list of each class that has an end date before 1 January of this year - about 200 cases.

  When I swap around the place where clause:

  < name cfquery = "classes" datasource = "" #DSN # "dbtype ="ODBC">"

  SELECT classesTitles.ClassTitle, classesTitles.ClassDesc, classCatagories.catagoryName, classes.classStart, classes.classEnd, classes.classNotes, owners.fName, owners.lName, classTime.timeSlot, classes.classID, classes.classLimit

  FROM classCatagories INNER JOIN (((classes INNER JOIN classesTitles ON classes.classTitle = classesTitles.classTitleID) INNER JOIN classTime WE classes.classTime = classTime.timeID) INNER JOIN owners WE classes.classInstructor = owners.ownerID) ON classCatagories.catagoryID = classesTitles.ClassType

  WHERE classes.classEnd > 01/01 / #DatePart ("yyyy", now())) #.

  ORDER BY classes.classStart, classCatagories.catagoryName, classTime.timeSlot, classesTitles.ClassTitle

  < / cfquery >

  I get EACH class in the database, and I should get only about 50

  The classes are long about 8 weeks, the dates of beginning and end are in the database in the form of date/time fields, so I need to show everything that ends in 2010, regardless of when it began.

  I'm sure it's something pressing, but he's avoiding me.

  Thank you

  Michelle

  Your field format date in access is irrelevent to the situation at hand.  Use objects appropriate date instead of trying to build an appropriate string.  On 1 January of the current year, the createdate() of coldfusion functions and year() now() are your friends.  Then, a message from Adam was not clear, use cfqueryparam with the resulting variable.

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  original title: Windows Visa re - install

  I had to reinstall windows on my Dell XPS recently. I used all the original disks and now I get an error when I try to activate it. I entered codes product etc. According to the disks but still no joy. How to solve this?

  Kind regards

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  I had to reinstall windows on my Dell XPS recently. I used all the original disks and now I get an error when I try to activate it. I entered codes product etc. According to the disks but still no joy. How to solve this?

  Kind regards

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  Activate by phone

  http://www.Vistax64.com/tutorials/84488-activate-Vista-phone.html
  Please note this step #9

  If the activation service informs you that she has failed and cannot help with activation, then STAY ON THE LINE and your call will be transferred to an operator of activation which will help you to activate your copy of Vista. The operator will give you all the numbers to ID of Confirmation if they accept that your copy of Vista is legitimate.
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  Hello

  1. where did you save the file?

  2 did you observe in the location where you saved the file?

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• SQL query to meet all the conditions.

  ID of country client_name

  a                      india        1

  a                     US            1

  one

  WE

  1

  b                      india         1

  c                      india        1

  c                      india         1

  c                      india         1

  c                     us             1

  c                    US            1

  If I do a count if the id of group by client_name and country column I'll get value like that...

  client_name country count (id)

  a                  india          1

  a                    US          2

  b                  india          1

  c                  india          3

  c                   US           2

  Condition of the obligation:

  (1) if the customer is in effect in several countries then show that the customer and country having count (id) > 2, (over the case it will be customer = 'b' and country India, country will be us skip)

  (2) if the customer is does not exist in several countries then show that client and default country (in above cases it will be customer = 'b') while count (id) is less than 2., we show him...

  Catch for me is :-also, we should not ignore any customer... so, as in a. customer... as count (id) for the two countries is not more than 2... so, as per above logic... this client will ignore if we apply only above two conditions

  but we need to show the customer in this case... and take the two value... so my end result I need will be:

  customer country

  a India

  a                    US

  b the India

  c India

  Please suggest the query to achieve even... I am able to get the query that meets condition 1 and condition 2. but failure to have taken also in request... so in my query output is all above, except customer one is ignored

  Thank you very much!

  Hello

  I think I see.  You want to display the lines of 'best' available for any client, where the lines with a COUNT (*) 2 > are 'better' than the lines with COUNT (*) <= 2. ="" if="" a="" client="" has="" any="" rows="" with="" count="" (*)="">2, then to display the lines were COUNT (*) > 2, but if all the lines for a customer have COUNT (*)<= 2,="" then="" those="" are="" the="" "best"="" rows="" available,="" so="" you="" want="" to="" show="" them. ="" how="" many="" different="" countries="" a="" client="" is="" related="" to="" doesn't="">

  I always CREATE TABLE and INSERT statements for your sample data, so I'll we table scott.emp to illustrate.  Instead of customer and country, as at your table, we will use deptno and job.  This query:

  SELECT deptno, job

  AS cnt ACCOUNT (*)

  FROM scott.emp

  GROUP BY deptno, job

  ORDER BY deptno, cnt

  ;

  display the relevant data, i.e.:

  DEPTNO JOB CNT

  ---------- --------- ----------

  10. THE CHAIRMAN 1

  MANAGER 10 1

  10 1 CLERK

  20 MANAGER 1

  20 2 ANALYST

  20 CLERKS 2

  30 1 CLERK

  30 1 MANAGER

  30 4 SELLER

  But we don't want to show all the data.  We want to only show the best available for each deptno line type, where the lines with the cnt > 2 (let's call these lines of class 'A') are better then with the NTC<= 2="" (let's="" call="" these="" class="" 'b'="" rows.) ="" the="" output="" we="" want="">

  DEPTNO JOB CNT

  ---------- --------- ----------

  10. THE CHAIRMAN 1

  10 1 CLERK

  MANAGER 10 1

  20 CLERKS 2

  20 MANAGER 1

  20 2 ANALYST

  30 4 SELLER

  Deptnos 10 and 20 only have rows of 'B' class, if we want to display the lines of 'B' class for these deptnos.  DEPTNO 30 has at least 1 row of class 'A', so we only show the lines of 'A' class of deptno = 30.  This is an example of a Query of Top - N, and here's a way to do it:

  WITH got_r_num AS

  (

  SELECT deptno, job

  AS cnt ACCOUNT (*)

  DENSE_RANK () OVER (PARTITION BY deptno

  ORDER OF CASES

  WHEN COUNT (*) > 2

  THEN "A".

  OF ANOTHER 'B '.

  END

  ) AS r_num

  FROM scott.emp

  GROUP BY deptno, job

  )

  SELECT deptno, job, cnt

  OF got_r_num

  WHERE r_num = 1

  ;

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