Benfit of using uuid in DB tables

HI ,
i need to create new Z tables with relation between them and my question is what is the benefit of using UUID as the key with mandt .
does it help me to read the data or when i read (select ) from the tables i dont need to use it .
also how i can use it in join between two tables ?
Reagrds
Nina

HI Mickey ,
Thanks
1. when i using key in tables i sure that i don't have the same record twice for instace if i have in table
mandt key
user 123 key
userid 88888 key
i am sure that in the table i dont have this record twice
but if i had the uuid in table i think that the some entries can have same values like
entry one
mandt key
uuid 7777777 key
user 123
userid 88888
entry two
mandt key
uuid 666666 key
user 123
userid 88888
how can i avoid it ,i think i miss here something .
2. if i have 2 tables with some different and equal fields and i want to use join how i can do it ?for instance
table 1
mandt key
uuid 7777777 key
user 123
userid 88888
postion manager
table 2
mandt key
uuid 7777777 key
user 123
userid 88888
adress usa
mail www
do i have an example?
Best regards
Nina

Similar Messages

Using UUID istead of commoen fields

HI All
I Have two Z DB tables with almost the same fields and my question is if in table one table
instead the common fields I can use UUID .
1. what is the benefit of this
2. how i can read data from table one
This are the tables
Table one
mandt type sy-mandt "key
User type bname "key
hardware type char30"key
application type char 30 "key
cdate
ctime
Table 2
mandt type sy-mandt "key
User type bname "key
hardware type char30"key
application type char30 "key
application_att type char30"key
application_ver type char30"key
application_value type char50
cdate
ctime
Best Regards
chris

UUID are to be used when some data is shared by multiple applications, and these applications have different keys to access this data (I'm not sure to be clear ).
The problem with UUIDs is that it makes the database a little bit abstract, and it's not easy to read via general tools like SE16, SM30.
I don't know how complex is your application, but I don't advise you to do so.

To Use Cursor or TYPE table Index by PLS_integer

Hi All,
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What is it you want to do to/with the rows you're looping through?
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How to use non-default Alias Table in Analyzer report

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Use of client dependent tables

Hi Gurus,
I have read many threads on difference between client dependent and independent data/objects etc.
But, someone tell me please, wheat exactly the 'Use or Advantage' of client dependent tables/data.
Thanks in advance.
V

HI,
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When you log on to an SAP System, you log on to a particular client of this system. Any activities you carry out in the system are always carried out in one client. When you plan your SAP system landscape, you must consider which clients you need for which activities.
By assigning activities to be performed in a client, you give each client a particular role. This section describes the most important client roles.
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A separate client is required for productive use of the SAP System. So that this client can be used without disruption, it is essential that no Customizing settings or Workbench developments are made here, and also that no tests are carried out. This client is known as the Production Client, PROD for short.
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We recommend that you make all your Customizing settings in a single Customizing client, and then use the CTS to transport them to the other clients.
We also recommend that you do not make any Customizing settings or Workbench developments in the quality assurance or production clients. You can make sure of this by making appropriate client settings.
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Examples of other client roles are:
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Prototype or sandbox client (SAND): You can use this client to test any client-specific Customizing settings if you are not sure whether you want to use them in this form. Any settings that you want to keep are then entered in the Customizing client. To prevent conflicts between the prototype client settings and real settings in the Customizing client, you cannot make changes to cross-client Customizing data and Repository objects in the prototype client. The CTS does not record changes made to client-specific Customizing data, and does not transport them from the prototype client. You can make sure of this by making appropriate client settings.
Training client (TRNG): To prepare end users for new functions that are to be transported into the production client, you can set up a training client. The users can use the new functions in this client with specially created application data. This client is set so that you cannot make changes to Customizing data and Repository objects.'''
plzz reward if this information is usefull to u plaa dont forget to reward

Project Stock report using QBEW and QBEWH tables

Dear All,
First of all Happy New Year to all of you.
Here is my question: I want to build a ABAP report for stock situation for project stock. The report demands the stock by closing month. Suppose I run the report for month 11/2010, it should show the closing stock at the end of the month 11/2010.
Now I am using the values from table QBEW for this purpose.But QBEW table shows only current entries. If a material stock is changed or value is changed, it goes into history table QBEWH.
Now problem is that if I try to make sum of QBEW and QBEWH, the stock value is excessive. Now I am not sure which entries I should consider from QBEWH table for this purpose.
Has anybody worked on similar requirement?
Thanks in advance!
Regards,
Mahendra Dighe

Hi,
Please try the report S_P00_07000140 - Inventory and Raw material for special stock report.
Thanks.
abdul

Using one user account table across multiple databases but account used as a foreign key

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You can use Triggers or using replication.
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How to use substr in external table defnition.

Hi All,
Im using oracle 11g. I have an external table which is reading data from a file. For one of the column, i need to get only the first 250 characters. My external table defnition looks like this
create table tbl_substr
( col1 varchar2(20),
col2 varchar2(250)
organization external
( type oracle_loader
default directory XXXX
access parameters (
records delimited by newline
FIELDS TERMINATED BY '|'
missing field values are null
( col1 ,
col2 "substr(:col2,1,250)"
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reject limit unlimited
But this defnition gives an error when i do select * from tbl_substr
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You need to play with COLUMN_TRANSFORMS
http://download.oracle.com/docs/cd/B19306_01/server.102/b14215/et_params.htm#sthref1792
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USING SUM IN INTERNAL TABLE

plz give me a simple example for using SUM in internal table and do some calculations in the same internal table.

HI
CHECK WITH THIS
Syntax
SUM.
Effect
The statement SUM can only be specified within a loop starting with LOOP, and is only considered within a AT- ENDAT control structure. Prerequisites for using the statement SUM include using the addition INTO in the LOOP statement, and that the specified work area wa is compatible with the row type of the internal table. In addition, SUM cannot be used when the row type of the internal table itab contains components that are tables.
The statement SUM calculates the component total with the numeric data type (i, p, f) of all rows in the current control level and assigns these to the components of the work area wa. In the control levels FIRST, LAST, and outside of an AT-ENDAT control structure, the system calculates the sum of numeric components of all rows in the internal table.
Example
Control level processing for creating a list. At the end of line groups, the total of reserved places is calculated and issued.
DATA: sflight_tab TYPE SORTED TABLE OF sflight
                  WITH UNIQUE KEY carrid connid fldate,
      sflight_wa LIKE LINE OF sflight_tab.
SELECT *
       FROM sflight
       INTO TABLE sflight_tab.
LOOP AT sflight_tab INTO sflight_wa.
AT NEW connid.
    WRITE: / sflight_wa-carrid,
             sflight_wa-connid.
    ULINE.
ENDAT.
WRITE: / sflight_wa-fldate,
           sflight_wa-seatsocc.
AT END OF connid.
    SUM.
    ULINE.
    WRITE: / 'Sum',
              sflight_wa-seatsocc UNDER sflight_wa-seatsocc.
    SKIP.
ENDAT.
AT END OF carrid.
    SUM.
    ULINE.
    WRITE: / 'Carrier Sum',
              sflight_wa-seatsocc UNDER sflight_wa-seatsocc.
    NEW-PAGE.
ENDAT.
AT LAST.
    SUM.
    WRITE: / 'Overall Sum',
              sflight_wa-seatsocc UNDER sflight_wa-seatsocc.
ENDAT.
ENDLOOP.
Hope this solves ur problem....
<b>do reward if useful....</b>
regards
dinesh

Proper use of a Lookup table and adaptations for NET

Hello,
I need to create a few lookup tables and I often see the following:
create table Languages
Id int identity not null primary key (Id),
Code nvarchar (4) not null,
Description nvarchar (120) not null,
create table Posts
Id int identity not null primary key (Id),
LanguageId int not null,
Title nvarchar (400) not null,
insert into Languages (Id, Code, Description)
values (1, "en", "English");
This way I am localizing Posts with language id ...
IMHO, this is not the best scheme for Languages table because in a Lookup table the PK should be meaningful, right?
So instead I would use the following:
create table Languages
Code nvarchar (4) not null primary key (Code),
Description nvarchar (120) not null,
create table Posts
Id int identity not null primary key (Id),
LanguageCode nvarchar (4) not null,
Title nvarchar (400) not null,
insert into Languages (Code, Description)
values ("en", "English");
The NET applications usually use language code so this way I can get a Post in English without using a Join.
And with this approach I am also maintaining the database data integrity ...
This could be applied to Genders table with codes "M", "F", countries table, transaction types table (should I?), ...
However I think it is common to use int as PK in lookup tables because it is easier to map to ENUMS.
And know it is even possible to map to Flag Enums so have a Many to Many relationship in an ENUM.
That helps in NET code but in fact has limitations. A Languages table could never be mapped to a FLags Enum ...
... An flags enum can't have more than 64 items (Int64) because the keys must be a power of two.
A SOLUTION
I decided to find an approach that enforces database data integrity and still makes possible to use enums so I tried:
create table Languages
Code nvarchar (4) not null primary key (Code),
Key int not null,
Description nvarchar (120) not null,
create table Posts
Id int identity not null primary key (Id),
LanguageCode nvarchar (4) not null,
Title nvarchar (400) not null,
insert into Languages (Code, Key, Description)
values ("en", 1, "English");
With this approach I have a meaningfully Language code, I avoid joins and I can create an enum by parsing the Key:
public enum LanguageEnum {
[Code("en")
English = 1
I can even preserve the code in an attribute. Or I can switch the code and description ...
What about Flag enums? Well, I will have not Flag enums but I can have List<LanguageEnum> ...
And when using List<LanguageEnum> I do not have the limitation of 64 items ...
To me all this makes sense but would I apply it to a Roles table, or a ProductsCategory table?
In my opinion I would apply only to tables that will rarely change over time ... So:
    Languages, Countries, Genders, ... Any other example?
About the following I am not sure (They are intrinsic to the application):
   PaymentsTypes, UserRoles
And to these I wouldn't apply (They can be managed by a CMS):
   ProductsCategories, ProductsColors
What do you think about my approach for Lookup tables?
Thank You,
Miguel

>>IMHO, this is not the best scheme for Languages table because in a Lookup table the PK should be meaningful, right?<<
Not necessarily. The choice to use, or not to use, a surrogate key in a table is a preference, not a rule. There are pros and cons to either method, but I tend to agree with you. When the values are set as programming terms, I usually use a textual value
for the key. But this is nothing to get hung up over.
Bear in mind however, that this:
    create table Languages
      Id int identity not
null primary key
(Id),
      Code nvarchar (4)
not null, Description nvarchar
(120) not
null,
is not equivalent to
    create table Languages
      Code nvarchar (4)
not null primary
key (Code),
      Description nvarchar (120)
not null,
The first table needs a UNIQUE constraint on Code to make these solutions semantically the same. The first table could have the value 'Klingon' in it 20 times while the second only once.
>>However I think it is common to use int as PK in lookup tables because it is easier to map to ENUMS.<<
This was going to be my next point. For that case, I would only change the first table to not have an identity assigned key value, as it would be easier to manage at the same time and manner as the enum.
>>. A Languages table could never be mapped to a FLags Enum ...<<
You could, but I would highly suggest to avoid any values encoded in a bitwise pattern in SQL as much as possible. Rule #1 (First Normal Form) is partially to have 1 value per column. It is how the optimizer thinks, and how it works best.
My rule of thumb for lookup (or I prefer the term "domain" tables, as really all tables are there to look up values :)), is all data should be self explanatory in the database, through data if at all possible. So if you have a color column,
and it contains the color "Vermillion", and all you will ever need is the name, and you feel like it is good enough to manage in the UI, then great. But bear in mind, the beauty of a table that is there for domain purposes, is that you can then store
the R, G, and B attributes of the vermillion color (254, 73, 2 respectively, based on
http://www.colorcombos.com/colors/FE4902) and you can then use that in coding. Alternate names for the color could be introduce, etc. And if UserRoles are 1, 2, 3, and 42 (I have seen worse), then
definitely add columns. I think you are basically on the right track.
Louis
Without good requirements, my advice is only guesses. Please don't hold it against me if my answer answers my interpretation of your questions.

Best way of Using Index on a Table.

I am trying to understand the phenomena of using INDEX on a Table
need some guidance!!!
Let us take this scenario
I have a table "MYRECORD" which has 4 attributes(or coulombs)
1. "STATE" (varchar) // this can have 49 different values like newyork, dehli etc
2. "YEAR" //a year like 2007
3. "MONTH" //a month like JAN,FEB etc
4. "CAT" (int) // type(category) of data represented by values 0 to 40
with a PRIMARY KEY(STATE,YEAR,MONTH,CAT)
now i will create index
1. INX_myrecord (STATE,YEAR,MONTH) on table MYRECORD
so now my question is
1. what is the effect on performance of DB it makes?
2. when I use a query
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3. how can I refer a index by name in a query if so possible?
Cheers,
UD
Message was edited by:
UDAY

You have edited your post. Now you have a primary key consisting of state, year, month and cat which makes an index on state, year and month useless as the already existing primary key can provide for retrieval of rows by index. If you don't have other columns - or just few other not being large varchar2 columns - you should have created the table as an IOT (Index Organized Table - avoiding to have separate table and index containing - nearly - the same data) in the first place.
As a primary key by definition can contain only unique non null values, a query like SELECT * FROM MYRECORD WHERE STATE='dehli' AND YEAR=2007 AND MONTH='JAN' cannot give you more than the number of distinct cat values (0 .. 40) + 1 (if cat can be null - presumed one/some of the corresponding state, year and month is not null)
The information processing depends principally of the query, the mere presence of an index does not make sure it will be used. If an index is used it means the index will be searched first then the table rows will be accessed by rowids contained in the index (usually a single row or a range of rows - a rather small number of them - is retrieved this way, your select for example). Submitting something like SELECT * FROM MYRECORD WHERE YEAR=2007 AND cat=33 would most likely produce a full table scan of myrecord table ignoring the primary key.
Regards
Etbin

How to use the item of table(ms access) in pl/sql

I want to use oracle forms builer developer application with ms access database
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MERGE INTO EmpDept Target
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e.Design,
e.EmailId,
e.EmpId,
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D.DeptId,
D.DeptName,
D.Location
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EmpId,
Ename,
ManagerId,
Salary,
DeptId,
DeptName,
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ManagerId,
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DeptId,
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Location)
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How to use database look up table function in xsl mapping

Can anybody tell me how to use database look up table function while mapping xsl between 2 nodes.
I have an XML file coming in and depending on one of XML elements we need to decide which further path to take. But, using this XML element, we need to query database table, get metadata and accordingly take appropriate path. I have written lookup function which returns metadata value.
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LabVIEW Champion

Using SQL with Nested Table

Hi ,
Please assist as how can we do this thing
i have a nested table of object type
create or replace type a1 as object
a number,
b varchar2(30),
region varchar2(30)
create type a1_array s table of a1;
declare
v_a1 a1;
v_a1_array a1_array:=a1_array();
begin
v_a1= a1(1, '1' , 'AUS');
v_a1_array.EXTEND;
v_a1_array(1):=v_a1;
v_a1= a1(2, '2' , 'AUS');
v_a1_array.EXTEND;
v_a1_array(2):=v_a1;
v_a1= a1(3, '3' , 'NAM');
v_a1_array.EXTEND;
v_a1_array(3):=v_a1;
end;
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Using SQL can i extract only 'AUS' rows and fetch in ARRAY OF TYPE v_a1_array (using Where clause and Table () functions )
Any help will be highly appreciated. Please assist. I have oracle 11g
Thanks

Hi,
GPU has already shown you how to do. I will just modify my original one:
SQL*Plus: Release 11.2.0.1.0 Production on Thu Aug 22 22:14:42 2013
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> set serveroutput on
SQL>
SQL> DECLARE
2     v_a1           a1;
3     v_a1_array     a1_array := a1_array ();
4     v_a1_array2    a1_array;
5 BEGIN
6     v_a1 := a1 (1, '1', 'AUS');
7     v_a1_array.EXTEND;
8     v_a1_array (1) := v_a1;
9     v_a1 := a1 (2, '2', 'AUS');
10     v_a1_array.EXTEND;
11     v_a1_array (2) := v_a1;
12     v_a1 := a1 (3, '3', 'NAM');
13     v_a1_array.EXTEND;
14     v_a1_array (3) := v_a1;
15
16     SELECT a1(a, b, region)
17       BULK COLLECT INTO v_a1_array2
18       FROM TABLE (v_a1_array)
19      WHERE region = 'AUS';
20
21     FOR c1 IN (SELECT *
22                  FROM TABLE (v_a1_array2))
23     LOOP
24        DBMS_OUTPUT.put_line ('A='||c1.a||', B='||c1.b||', REGION='||c1.region);
25     END LOOP;
26 END;
27 /
A=1, B=1, REGION=AUS
A=2, B=2, REGION=AUS
PL/SQL procedure successfully completed.
If you consider your question answered, please mark this thread as answered.
Regards.
Alberto

How to get Hide/Show using details in advanced table

Hi,
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If you are using the same VO and you execute in on page load then it must populate all view attribute.
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Benfit of using uuid in DB tables

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