How select works

Could you please provide some link explaining how select statement works.
SQL command is interpreted from right to left and componenets are executed in some sequence. I need to understand that.
Thanks
Arpit

hi...
on searching..some other facts in pl/sql...
i just came to know the solution for your query...
usually the order of execution for select statement will be..
1.Restriction i.e where clause
2.projection and
3.orderring...
for more information...t http://www.openlineconsult.com/db..
in that choose 5th option slides...Basic SQL
...am sorry for this very late reply..
by
beginner in sql

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How select statement works

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Straight from the concept manual:
http://download.oracle.com/docs/cd/B10501_01/server.920/a96524/c01_02intro.htm#3437
An Example of How Oracle Works
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Hi,
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Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
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Hi,
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How to work even and odd number query

Plz explain how below worked even and odd query
2 ) why used subquery after from and which time we can use(what time of out put)
even
select * FROM (SELECT ROW_NUMBER() OVER(ORDER BY stud_id) as row ,grno,stud_id from stud_Enrollment) d
WHERE d.row %2=0
odd
select * FROM (SELECT ROW_NUMBER() OVER(ORDER BY stud_id) as row ,grno,stud_id from stud_Enrollment) d
WHERE d.row %2=1

Row_Number function returns the sequential number of a row
(By using partition of a result set, starting at 1 for the first row in each partition)
>> why used subquery after from and which time we can use(what time of out put)
When we need sequntial numbers, we can use row_number function. Put it into derived table and use this derived table after FROM clause (Same way it is used in your query)
CREATE TABLE stud_Enrollment (
grno int,
stud_id int,
stud_name varchar(20)
INSERT INTO stud_Enrollment
VALUES (101, 511, 'Dheeraj'), (112, 521, 'Vaibhav'), (132, 522, 'Lalit'), (124, 564, 'Amogh'), (143, 598, 'Sushrut')
SELECT * FROM stud_Enrollment
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--grno stud_id stud_name
--101 511 Dheeraj
--112 521 Vaibhav
--132 522 Lalit
--124 564 Amogh
--143 598 Sushrut
-- Now we need to find out the rows which are at even position, ie row should be at position of 0,2,4,6,8 etc..
-- But we don't have sequential number here in your table result
-- So we can create one new column by using row_number function
SELECT
ROW_NUMBER() OVER (ORDER BY stud_id) AS row, --> additiona "row" column
grno,
stud_id,
stud_name
FROM stud_Enrollment
-- We got "row" column in below output
--row grno stud_id stud_name
--1 101 511 Dheeraj
--2 112 521 Vaibhav
--3 132 522 Lalit
--4 124 564 Amogh
--5 143 598 Sushrut
-- Now above table is used after FROM clause. It uses row column in WHERE part
SELECT
FROM (SELECT
ROW_NUMBER() OVER (ORDER BY stud_id) AS row,
grno,
stud_id,
stud_name
FROM stud_Enrollment) d
WHERE d.row % 2 = 0
--row grno stud_id stud_name
--2 112 521 Vaibhav
--4 124 564 Amogh
-Vaibhav Chaudhari

Can u explain me how to work with OOPs ABAP

Hi,
Can u explain me how to work with OOPS Abap, If possible pls send me some sample programs regarding OOps concept used in Realtime.
Thanks.

hii,
Please check this online document (starting page 1291).
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCABA/BCABA.pdf
Also check this links as well.
http://help.sap.com/saphelp_nw2004s/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
http://www.futureobjects.de/content/intro_oo_e.html
http://www.sap-img.com/abap/business-add-in-you-need-to-understand-abap-oo-interface-concept.htm
/people/ravikumar.allampallam/blog/2005/02/11/abap-oo-in-action
What is Object Orientation?
Object orientation (OO), or to be more precise, object-oriented programming, is a problem-solving method in which the software solution reflects objects in the real world.
A comprehensive introduction to object orientation as a whole would go far beyond the limits of this introduction to ABAP Objects. This documentation introduces a selection of terms that are used universally in object orientation and also occur in ABAP Objects. In subsequent sections, it goes on to discuss in more detail how these terms are used in ABAP Objects. The end of this section contains a list of further reading, with a selection of titles about object orientation.
Objects
An object is a section of source code that contains data and provides services. The data forms the attributes of the object. The services are known as methods (also known as operations or functions). Typically, methods operate on private data (the attributes, or state of the object), which is only visible to the methods of the object. Thus the attributes of an object cannot be changed directly by the user, but only by the methods of the object. This guarantees the internal consistency of the object.
Classes
Classes describe objects. From a technical point of view, objects are runtime instances of a class. In theory, you can create any number of objects based on a single class. Each instance (object) of a class has a unique identity and its own set of values for its attributes.
Object References
In a program, you identify and address objects using unique object references. Object references allow you to access the attributes and methods of an object.
In object-oriented programming, objects usually have the following properties:
Encapsulation
Objects restrict the visibility of their resources (attributes and methods) to other users. Every object has an interface, which determines how other objects can interact with it. The implementation of the object is encapsulated, that is, invisible outside the object itself.
Polymorphism
Identical (identically-named) methods behave differently in different classes. Object-oriented programming contains constructions called interfaces. They enable you to address methods with the same name in different objects. Although the form of address is always the same, the implementation of the method is specific to a particular class.
Inheritance
You can use an existing class to derive a new class. Derived classes inherit the data and methods of the superclass. However, they can overwrite existing methods, and also add new ones.
Uses of Object Orientation
Below are some of the advantages of object-oriented programming:
Complex software systems become easier to understand, since object-oriented structuring provides a closer representation of reality than other programming techniques.
In a well-designed object-oriented system, it should be possible to implement changes at class level, without having to make alterations at other points in the system. This reduces the overall amount of maintenance required.
Through polymorphism and inheritance, object-oriented programming allows you to reuse individual components.
In an object-oriented system, the amount of work involved in revising and maintaining the system is reduced, since many problems can be detected and corrected in the design phase.
Achieving these goals requires:
Object-oriented programming languages
Object-oriented programming techniques do not necessarily depend on object-oriented programming languages. However, the efficiency of object-oriented programming depends directly on how object-oriented language techniques are implemented in the system kernel.
Object-oriented tools
Object-oriented tools allow you to create object-oriented programs in object-oriented languages. They allow you to model and store development objects and the relationships between them.
Object-oriented modeling
The object-orientation modeling of a software system is the most important, most time-consuming, and most difficult requirement for attaining the above goals. Object-oriented design involves more than just object-oriented programming, and provides logical advantages that are independent of the actual implementation
http://www.sapgenie.com/abap/OO/index.htm
http://www.geocities.com/victorav15/sapr3/abap_ood.html
http://www.brabandt.de/html/abap_oo.html
Check this cool weblog:
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
/people/sap.user72/blog/2005/05/10/a-small-tip-for-the-beginners-in-oo-abap
/people/ravikumar.allampallam/blog/2005/02/11/abap-oo-in-action
/people/thomas.jung3/blog/2005/09/08/oo-abap-dynpro-programming
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b6254f411d194a60000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://www.esnips.com/doc/375fff1b-5a62-444d-8ec1-55508c308b17/prefinalppt.ppt
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://www.allsaplinks.com/
http://www.sap-img.com/
http://www.sapgenie.com/
http://help.sap.com
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://www.sapgenie.com/abap/controls/index.htm
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_erp2005/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
these links
http://help.sap.com/saphelp_47x200/helpdata/en/ce/b518b6513611d194a50000e8353423/content.htm
For funtion module to class
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5954f411d194a60000e8353423/content.htm
for classes
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5c54f411d194a60000e8353423/content.htm
for methods
http://help.sap.com/saphelp_47x200/helpdata/en/08/d27c03b81011d194f60000e8353423/content.htm
for inheritance
http://help.sap.com/saphelp_47x200/helpdata/en/dd/4049c40f4611d3b9380000e8353423/content.htm
for interfaces
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b6254f411d194a60000e8353423/content.htm
For basic stuff......
abap oops
http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
http://esnips.com/doc/448e8302-68b1-4046-9fef-8fa8808caee0/abap-objects-by-helen.pdf
http://esnips.com/doc/39fdc647-1aed-4b40-a476-4d3042b6ec28/class_builder.ppt
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/frameset.htm
ABAP Business Development and Service Provisioning/ABAP Objects
General information
What is Object Orientation?
some blogs
A small tip for the beginners in OO ABAP
Object Oriented ABAP (OO-ABAP)
and others wiki OO Abap
cheers,
sharad
Edited by: sharad narayan on Apr 29, 2008 12:19 PM

Explanation of how Iphoto works.

Can someone please explain to me how iPhoto works as far as organizing photos and duplicating/converting photos. I have a bunch of photos in my photo file, and I would like to keep them all in one place (via iPhoto), but when I have experimented with it, Ive knowticed that dragging photos into iphoto, doesnt move the file at all, it just duplicates it, and then hides the duplication?, it also changes the image into a smaller file and creates "thumbnails???" I'm so confused. Can someone tell me what im supposed to do.

Hi Derek,
Here is some more info to add to PhillyPhans great answer.
--First thing to know and remember is this...Do not drag any images, folder of images into the iPhoto Library in the Finder. Images have to be imported into iPhoto within the application. Do not scan images and save them into the iPhoto Library folder in the Finder. Save them to another location such as the Pictures folder or even the desktop. You can then import them into iPhoto.
If you have already put files/folders in the iPhoto Library folder in the Finder then you will also find out that if you try to import them into iPhoto you will get an error message. No worry, just drag them to the desktop and import from there.
--All images that you import are shown in the library view. You can choose how you want to view, by rolls, by date, by rating, etc. When you put images in an Album, slideshow, book, etc, you are actually just putting pointers to those images in the library. You are not adding more images. If you delete an image from the Album it will still be in the library. If you delete an image from the library it is deleted from iPhoto's database (the iPhoto Library folder in the Finder) and your hard drive ONLY after you empty iPhoto's trash. (unless you have it backed up somewhere else)
--You have a folder of images on your hard drive and want to import them into iPhoto. Drag the folder of images into an open iPhoto Library window and the folder of photos will be copied into the library, resulting in a new roll with the name of the folder. You now have two copies of those photos, the ones in iPhoto's database and the ones on your desktop. You can keep the ones on your desktop that you just imported as backup or you can delete that folder. You can also drag a folder of photos into an empty space in the source column and a new roll and album will be created at the smae time for those images in the folder. The album will have the same name as the folder you dragged into the source column.
-- you scan a picture/pictures and save it in a folder. You cannot scan directly into iPhoto or the iPhoto Library folder in the Finder.
You want all your photos in iPhoto so you import them into iPhoto.
Now you have two copies of that picture/pictures, so you can delete the originals that were in the scanned folder and keep the one/ones that were imported into iPhoto.
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(a quick note on cropping within iPhoto...when you are in edit mode, you automatically will be in the crop mode with cross hairs to highlight the crop area. To finish cropping you must click the crop button and then go back to library view and your cropped picture will be there.
--You want to use Photoshop or another graphic program to edit a picture in your iPhoto library.
You can open up prefs for iPhoto and choose
For iPhoto 5--"when double clicking on
photo" ..do" choose "other" and select Photoshop. Now you can edit all
pictures in your iPhoto library in PhotoShop by double clicking. If you save the photo with the same name and as a flattened file it will be saved right into iPhoto and you will see the changes. If you don't want to save it into iPhoto then do a "save as" and save to the desktop. You will then have the original photo still in iPhoto and your new edited photo on the desktop.
For iPhoto 6 (from the Apple Help Menu)-Have you ever used PS as the external editor set up within iPhoto Prefs?
From the iPhoto Help menu;
"Choosing what happens when you click the Edit button
When you want to edit a photo, you can have the photo open in iPhoto's edit view, in a separate window, in full-screen view, or in another application.
To choose a preference:
Choose iPhoto > Preferences.
Click General at the top of the Preferences window.
Under Edit Photo, select one of the following options:
"In main window" opens the photo in the main viewing area.
"In separate window" opens the photo in a separate window.
"Using full screen" opens the photo in full-screen view.
"In application" opens the photo in another application you choose.
To open a photo in its own window when "Main window" is selected, press the Option key when double-clicking the photo.
To open a photo in edit view when "Separate window" is selected, press the Option key when double-clicking the photo.
Note: Any video clip you imported into iPhoto will always open in QuickTime Player when you double-click it."
And...
"Editing photos in another application
You can do many editing tasks in iPhoto, such as rotating and cropping a photo, changing a color photo to black and white, adjusting exposure and contrast, and reducing red-eye. If you want to make other changes to a photo, you can open it in another image-editing application, such as Adobe Photoshop.
To edit photos in another application:
Set your preferences to open photos in another application when you double-click them or click the Edit button. (See Related Topics below.)
Double-click the photo to open it in the application.
Edit the photo and save it using the same name and file format.
The changes you made to the photo will be visible when you return to iPhoto.
IMPORTANT: When you double-click a RAW-format photo, iPhoto creates a copy of the photo in JPEG format, which opens in the other application. To edit the photo in its original RAW format, drag the photo from the iPhoto window to the Finder, and then use the other application to open it. (If you previously used iPhoto to edit the RAW photo, select the photo and choose Photos > Revert to Original before dragging it to the Finder. This way, you can edit the photo using its RAW data in the other application.) If you want to import the photo back into iPhoto, you must first save it as a JPEG or TIFF file."
--Or, with iPhoto open, you can drag a picture from the library window
to your desktop (you see a + sign on the pic you are dragging). You now
have two of the same picture, one in the iPhoto library and one on your desktop. You can open up the one on your desktop in any graphic program and work on it. The one in iPhoto stays the same. You can also share/export the picture/pictures to your desktop or folder to work on them or do batch processing, etc. You will still have the originals in your iPhoto Library.
--Or, you can open up the ~/Pictures/iPhoto Library/folders and option drag any
picture out of the folder to your desktop. Notice that you will see a plus sign while dragging the photo. This is copying the file to your desktop
I would advise anyone not to do this as they might forget to use the option key and drag the photo out. Next time you open iPhoto the photo will be missing.
-The one option you will not find within iPhoto is to resize photos. iPhoto wants you to keep all full size images within iPhoto to give you the best size for printing or using for other applications. You can however go to Share>export (for iPhoto 5) or File>export (for iPhoto 6) and choose the naming scheme, input the dimensions and export to the desktop to use for uploading to a web space or emailing.
--to email a photo set up your email client in iPhoto Preferences. Once done, just select a photo/photos and hit the email icon in the toolbar.
If you use a web based email, then you need to export the photo to the desktop and upload it from there.
Two Apple kbs for you to read
Don't tamper with files in the iPhoto library folder
About the iPhoto Library folder
Don't forget that in Library view you can Control click on any picture and get a contextual menu with many options. One is to revert to original.
For more help and information you can go to the Help menu wiithin iPhoto and input your search term in the search bar, then hit the "enter" key on the keyboard or just browse through the topics and categories.
You can also go to the iPhoto Support site and browse the topics there including the tutorials.
iPhoto Support

How icloud works ?

I have 2 questions as i don't quite understand how icloud works. (1) Is there a way of seeing what is backed up on i-cloud or do you just assume it is working? If i lost my phone, could someone delete my icloud account and lose all of my data ?

If turned on, iCloud will keep your contacts, calendars, notes, etc, on a server (similar to MS Exchange) allowing you to keep the content in sync with other devices (iPhone, iPad, iPod touch, Mac or even PC). Those are not part of the iCloud "backup".
From HT4859:
You get 5 GB of free iCloud storage for:
Photos and videos in the Camera Roll
Device settings (for example: Phone Favorites, Wallpaper, and Mail, Contacts, Calendar accounts)
App data
Home screen and app organization
Messages (iMessage, SMS, and MMS)
Ringtones
Visual Voicemails
You can select which applications back up their data and see how much storage space each application is using:
On your Home Screen, tap Settings
Tap iCloud
Tap Storage & Backup
Tap Manage Storage
Select the device you want to manage
http://support.apple.com/kb/HT4859

How LACP works over non-ethernet networks?

Hi all. Everybody knows how works LACP between two switches.
This is predictable wired links. But how it works in another, not clear ethernet networks? Supposing one link in LAG is over wireless transparent bridge. In this case values of packet delay, jitter and packet loss over one of the links differs from another.
Instead wireless bridge there can be IP/MPLS or SDH network for example.
How it works? Are there any tresholds for counters on links? Maybe any configurable parameters?

The configuration of each router should be provided in the Apple Support article link I provided you.
Basically you will not need to make any changes to the Motorola router just the AirPort Express.
Roaming Network Setup Basics
For the AirPort Express base station:
Setup the base station as a bridge. Network tab > Router Mode: Off (Bridge Mode)
Provide a unique Base Station Name.
The Network Name (SSID) should be identical to that of the Motorola.
If using security, use the same security type (WEP, WPA, etc.) and password. Note: It is highly recommended that you use WPA2 Personal for best bandwidth performance.
The following are the basic setup steps:
Power all the networking hardware down.
Perform a "factory default" reset on the AirPort Express. Note: You may have to perform this more than once to make sure they "stick."
Connect one Ethernet cable between the Ethernet port on the Motorola router to the Ethernet port on the Express.
Power up just the Motorola router. Verify that you can get Internet connectivity with network clients either by wireless or by wire connections to the Motorola router.
Power up the Express base station. Use the AirPort Utility to select it.
Configure the Express with the Network Mode option set to: Create a wireless network. (Note: Do NOT set it to "Extend a wireless network."
Set the Wireless Network Name, Wireless Security, & Wireless Password options to be exactly the same as that used for the Motorola.
Set the Router Mode to: Off (Bridge Mode).
Select Update and allow the Express to restart.
Once restarted verify that you can roam with a wireless laptop or iOS device between base stations and still gain Internet access.

How to work with Alphanumeric Editor in Screen Painter?

Hello Guys,
I am trying to work on Screen Painter Layout and it's showing me that Graphical Screen Editor is not
available and continue working with Alphanumeric Editor.I don't know how to work on this.Guys,
Please let me know why is the message and what can we do about it.
Thanks in advance,
Sri

Somtimes you will get this message if something got screwy with your SAPgui, for me simply closing out of SAPgui and going back in has fixed this issue. If you do not know for sure that your SAPgui had been installed including the screen painter, then you should start there. You will need the SAPgui installation executable, either from CDs or a downloaded file. Run the SAPgui installation, and make sure to select the screen painter as part of the install, i believe it is under "development tools" in previous versions. In newer versions I believe it is installed by default, but I do no for a fact that it is not this way in earlier releases, such as the 46D gui.
So for make sure that Screen Painter has been installed with your SAPgui, if you are sure that it had been installed, perhaps it was working fine yesterday, then I would suggest first closing out SAPgui, and going back in, and trying the screen painter, If the problem persists, it may be worth it to reinstall the gui.
Regards,
Rich Heilman

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