NOT IN and ANTI JOIN

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• Is not null and null join

  Hi, I am trying to correctly display a list of tasks for a project, but without a join with the project number (which I was aware of) and the employee table, I get over 500 results.
  
  The task can be created without a responsible employee of her as well, so that the page does not require the field to fill.
  
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  select
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      pd.task_title           "Task Title",
      pd.DETAIL_STATUS        "Task Status",
      pm.name                 "Associated Project",
      pps.last_name||', '||pps.first_name||', '||pps.middle_initial||'.' "Assigned Employee",
      pd.TRACKIT_NUMBER       "TrackIt! Number", 
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      pd.DATE_BEGIN           "Date Began",
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  from
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      and r.fk_master_id = pm.PK_PROJ_MASTER_ID
      and (r.emp_id = pps.emple_no
          or r.emp_id is null)

  Hello

  Replace:

  res.last_name||', '||res.first_name||', '||res.middle_initial||'.' "Assigned Employee",
  

  with

  res.last_name
  ||    CASE
            WHEN  res.first_name IS NOT NULL
            THEN  ', ' || res.first_name
        END
  ||    CASE
            WHEN  res.middle_initial IS NOT NULL
            THEN  ', ' || res.middle_initial || '.'
        END     AS  "Assigned Employee",
  

  Here's why:

  If all res columns have a NULL value (which can happen because of the outer join), then

  res.last_name||', '||res.first_name||', '||res.middle_initial||'.' "Assigned Employee",
  

  is equivalent to

  NULL ||', '|| NULL ||', '|| NULL ||'.' "Assigned Employee",
  

  The punctuation is there to separate the three columns.
  If a column if the NULL value, you don't need to separate, so you need to make some sort of if-else operation to test if the punctuation is needed and show only if it is necessary.

  CASE expressions above will also give you a nicer output if some columns are set to NULL, but others are not.
  (For example, if the middle_initials are rarely saved.)

• anti and semi join

  Hi all

  IN and EXIST are semi joins

  and

  NOT IN and NOT EXIST are anti joins

  
  

  
  

  Please let me know if my interpretation is correct.

  
  

  
  

  Thank you
  

  Hello

  2947022 wrote:

  Hi all

  IN and EXIST are semi joins

  and

  NOT IN and NOT EXIST are anti joins

  Please let me know if my interpretation is correct.

  Thank you

  Not necessarily.

  Any type (internal, external, semi or anti) join could use any kind of subquery.

  You could say IN and EXISTS are correlated with the semi-jointures.  In other words, when you see IN or EXISTS, that can warn you about if there is a semi join, but it will not always be.  Conversely, when you need to make a join semi, you might think EXISTS or in first of all, but that is not always a good way.

• Error code 204 trying to download CC on new laptop (2nd computer) it will not download and receive the error code 204. I tried turn off anti-virus and firewall and get the same error code. How do we install CC?

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  ~~~~~~~~~~~~~~~~~~~~~~~~
  [1] full Disclosure: the difficulty operating in AGGRESSIVE mode will remove your update history but not list the updates installed in Add/Remove Programs (Windows XP) or installed updates.

  ~ Robear Dyer (PA Bear) ~ MS MVP (that is to say, mail, security, Windows & Update Services) since 2002 ~ WARNING: MS MVPs represent or work for Microsoft

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  Hi subhshy001,

  Welcome to the Microsoft Windows answers Forum community!

  Try this if you do not have

  Windows Explorer to create the folders and shortcuts in your document folder, drag and drop them on your desktop.

  If you have completed the steps and was not even useful,

  Follow these steps:

  Try to create a shortcut and sending it on the desktop.

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  There should be a shortcut on the desktop .

  Make sure that the "show desktop icon" has a check against it

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  You can scan your computer for malware.

  You can download, install and update anti-malware free of your favorite search engine and find malware.
  
  Important note: this response contains a reference to third party World Wide Web site. Microsoft provides this information as a convenience to you. Microsoft does not control these sites and no has not tested any software or information found on these sites; Therefore, Microsoft cannot make any approach to quality, security or the ability of a software or information that are there. There are the dangers inherent in the use of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software from the Internet.

  If the scan comes back clean, so I recommend doing a System File Checker too l to analyze your OS system files.

  To help resolve this problem, use the tool (SFC.exe) System File Checker to determine which file is causing the problem and then replace the file. To do this, follow these steps:

  1. open an elevated command prompt . To do this, click Start , click principally made programs , Accessories , right-click guest , and then click run as administrator .  If you are prompted for an administrator password or a confirmation, type the password, or click allow .
  2. type the following command and press ENTER: sfc/scannow (Yes there is a space after sfc) the sfc/scannow command analyzes all protected system files and replaces incorrect versions with appropriate Microsoft versions. This analysis do take some time to complete.

  Hope this information helped!

  Thank you, and in what concerns:

  Aziz Nadeem - Microsoft technical support.
  Visit our http://social.answers.microsoft.com/Forums/en-US/answersfeedback/threads/ Microsoft answers feedback Forum and let us know what you think.

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  3. Click Edit settings next to the computer name.
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  Hello

  1. don't you make changes on the computer before the show?
  2. what web browser do you use?
  3. what anti-virus is installed on the computer?
  
  Method 1:
  You can try the steps in the link and check:
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  For more information, please see the following links:
  http://Windows.Microsoft.com/en-us/Windows7/set-up-a-wireless-router
  http://Windows.Microsoft.com/en-us/Windows7/wireless-networking-frequently-asked-questions