Best way to fill a table where some row will already exist

I have a table of 100,000 Books
I have a Set 'Books' of 1000 Book Objects. (many of which will already exist in the table)
I want to add the books not already in the table, I can see a few ways to do this but not sure which is the most efficient.
A)
Get a ResultSet from the DB matching a 'SELECT' matching the Books in my Set.
iterate through ResultSet, removing Books in the Set, leaving the Set containing only Books not in the Table.
Add all books in Set to Table.
B)
Iterate through my Set of Books and add all of my books to the Table in turn
any Books already in the Table already existing will throw an exception
Ignore the exception
C)
Iterate through my Set of Books and check if each is in the Table
If already in Table go on to next Book
otherwise add to Table

Try it both ways, and see which takes longer.
Of course once you've done that, you don't need to know because the task is complete. But the information might be useful for the next time.

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Best way to fill a datagird with A LOT of data?

What's the best way to fill a datagrid with A LOT of data.
I'm talking about something like 10,000 rows. Can the datagrid
handle it? No screen is large enough to show 10,000 records..... is
there a way to load 50, and then when a user scrolls down it loads
the next 50 etc...?

Right. It's not recommended that you load 10,000 rows into
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info.

Best way to update RBSELBEST table for invoice

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Thanks. I tried this one also, but it does not update the table.
in case if someone used this, what parameters i need to pass for this to work?

I'm buying a new Macbook Pro this week and am wondering what is the best way to copy over the software I have from my existing Macbook Pro to the new one? eg. Photoshop and Office etc. I no longer have the CDs.

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Give some hints that in a table control , first row will be editable and

pls,
give some hints that in a table control , first row will be editable and
rest of the rows will be non-editable.

Hi,
Take the group1 for all the textboxes in table control as 'ABC'.
Use this code, its working:-
it_zekpo is my internal table w/o header line,
wa_zekpo is work area.
Name of input/output fields on screen are:-
wa_zekpo-field1,
wa_zekpo-field2, and so on...
At screen flow-logic
PROCESS BEFORE OUTPUT.
* MODULE status_8003.
LOOP WITH CONTROL po_tb.
    MODULE read_data.
ENDLOOP.
PROCESS AFTER INPUT.
* MODULE user_command_8003.
LOOP WITH CONTROL po_tb.
    MODULE modify_data.
ENDLOOP.
In PBO
*&      Module READ_DATA OUTPUT
MODULE read_data OUTPUT.
READ TABLE it_zekpo INTO wa_zekpo INDEX po_tb-current_line. "po_tab is table control name
"enable only first row and disable rest rows in table control.
IF sy-subrc EQ 0.
    IF sy-tabix GE 2.
      IF screen-group1 = 'ABC'.
        LOOP AT SCREEN.
          SCREEN-INPUT = 0.
          SCREEN-ACTIVE = 0.
        ENDLOOP.
        MODIFY SCREEN.
      ENDIF.
    ENDIF.
"disable empty rows
ELSE.
    IF screen-group1 = 'ABC'.
      LOOP AT SCREEN.
        SCREEN-INPUT = 0.
        SCREEN-ACTIVE = 0.
      ENDLOOP.
      MODIFY SCREEN.
    ENDIF.
ENDIF.
data : line_count type i.
describe it_zekpo
lines line_count.
po_tb-lines = line_count + 10.
"to increase the number of lines in table control dynamically
ENDMODULE.                 " READ_DATA OUTPUT
In PAI
*&      Module MODIFY_DATA INPUT
MODULE MODIFY_DATA INPUT.
MODIFY IT_ZEKPO FROM WA_ZEKPO INDEX po_tb-currentline.
ENDMODULE.                 " MODIFY_DATA INPUT
Hope this solves your problem.
Thanks & Regards,
Tarun Gambhir

Best way to check if table is empty or not

Hi. I had to check if a table was empty or not, and found different solutions.
One of them called my atention, I readed it was the best way to do it (some 'dual' trick from Steven Feuerstein, they say) :
SELECT 1 FROM DUAL WHERE EXISTS (SELECT 'X' FROM TABLE);
Plan
SELECT STATEMENT ALL_ROWSCost: 4 Cardinality: 1
     3 FILTER
          1 FAST DUAL Cost: 2 Cardinality: 1
          2 INDEX FAST FULL SCAN INDEX (UNIQUE) TABLE.UB_PK Cost: 2 Cardinality: 1
But doing some tests I found this query to have lower cost:
SELECT 1 FROM TABLE WHERE ROWNUM=1;
Plan
SELECT STATEMENT ALL_ROWSCost: 2 Cardinality: 1
     2 COUNT STOPKEY
          1 INDEX FAST FULL SCAN INDEX (UNIQUE) TABLE.UB_PK Cost: 2 Cardinality: 1
So, what about that dual table trick? Should I keep the 'select 1 where rownum=1' as best possible way?
I know it shouldn't matter much, but just wanna know what method works best for checking empty tables :)
Thanks.

As already mentioned, you cannot just base it on cost, as the cost is not specifically a good indicator of the amount of work that will need to be done, it's just an internal figure calculated for that query and isn't really that comparible across different queries.
If you're intending to see if there is data in a table because you want to know whether to query it or not, you are actually better to just try and query the data and capture the NO_DATA_FOUND exception and handle that. In that case it requires no effort or cost up front.

Opinion needed on best way to map multiple table joins (of the same table)

Hi all
I have a query of the format:
select A.col1, B.col1,C.col1
FROM
MASTER_TABLE A, ATTRIBUTE_TABLE B, ATTRIBUTE_TABLE C
WHERE
A.key1 = B.key1 (+)
AND
A.key1 = C.key1(+)
AND
B.key2(+) = 100001
AND
C.key2(+) = 100002
As you can see, I am joining the master table to the attribute table MANY times over, (over 30 attributes in my actual query) and I am struggling to find the best way to map this efficiently as the comparison for script vs. mapping is 1:10 in execution time.
I would appreciate the opinion of experienced OWB users as to how they would tackle this in a mapping and to see if they use the same approach as I have done.
Many thanks
Adi

SELECT external_reference, b.attribute_value AS req_date,
c.attribute_value AS network, d.attribute_value AS spid,
e.attribute_value AS username, f.attribute_value AS ctype,
g.attribute_value AS airtimecredit, h.attribute_value AS simnum,
i.attribute_value AS lrcredit, j.attribute_value AS airlimitbar,
k.attribute_value AS simtype, l.attribute_value AS vt,
m.attribute_value AS gt, n.attribute_value AS dt,
o.attribute_value AS datanum, p.attribute_value AS srtype,
q.attribute_value AS faxnum,
R.ATTRIBUTE_VALUE AS FAXSRTYPE,
s.attribute_value AS extno,
t.attribute_value AS tb, u.attribute_value AS gb
v.attribute_value AS mb, w.attribute_value AS stolenbar,
x.attribute_value AS hcredit, y.attribute_value AS adminbar,
z.attribute_value AS portdate
FROM csi_item_instances a,
csi_iea_values b,
csi_iea_values c,
csi_iea_values d,
csi_iea_values e,
csi_iea_values f,
csi_iea_values g,
csi_iea_values h,
csi_iea_values i,
csi_iea_values j,
csi_iea_values k,
csi_iea_values l,
csi_iea_values m,
csi_iea_values n,
csi_iea_values o,
csi_iea_values p,
csi_iea_values q,
CSI_IEA_VALUES R,
csi_iea_values s,
csi_iea_values t,
csi_iea_values u,
csi_iea_values v,
csi_iea_values w,
csi_iea_values x,
csi_iea_values y,
csi_iea_values z
WHERE a.instance_id = b.instance_id(+)
AND a.instance_id = c.instance_id(+)
AND a.instance_id = d.instance_id(+)
AND a.instance_id = e.instance_id(+)
AND a.instance_id = f.instance_id(+)
AND A.INSTANCE_ID = G.INSTANCE_ID(+)
AND a.instance_id = h.instance_id(+)
AND a.instance_id = i.instance_id(+)
AND a.instance_id = j.instance_id(+)
AND a.instance_id = k.instance_id(+)
AND a.instance_id = l.instance_id(+)
AND a.instance_id = m.instance_id(+)
AND a.instance_id = n.instance_id(+)
AND a.instance_id = o.instance_id(+)
AND a.instance_id = p.instance_id(+)
AND a.instance_id = q.instance_id(+)
AND A.INSTANCE_ID = R.INSTANCE_ID(+)
AND a.instance_id = s.instance_id(+)
AND a.instance_id = t.instance_id(+)
AND a.instance_id = u.instance_id(+)
AND a.instance_id = v.instance_id(+)
AND a.instance_id = w.instance_id(+)
AND a.instance_id = x.instance_id(+)
AND a.instance_id = y.instance_id(+)
AND a.instance_id = z.instance_id(+)
AND b.attribute_id(+) = 10000
AND c.attribute_id(+) = 10214
AND d.attribute_id(+) = 10132
AND e.attribute_id(+) = 10148
AND f.attribute_id(+) = 10019
AND g.attribute_id(+) = 10010
AND h.attribute_id(+) = 10129
AND i.attribute_id(+) = 10198
AND j.attribute_id(+) = 10009
AND k.attribute_id(+) = 10267
AND l.attribute_id(+) = 10171
AND m.attribute_id(+) = 10184
AND n.attribute_id(+) = 10060
AND o.attribute_id(+) = 10027
AND p.attribute_id(+) = 10049
AND q.attribute_id(+) = 10066
AND R.ATTRIBUTE_ID(+) = 10068
AND s.attribute_id(+) = 10065
AND t.attribute_id(+) = 10141
AND u.attribute_id(+) = 10072
AND v.attribute_id(+) = 10207
AND w.attribute_id(+) = 10135
AND x.attribute_id(+) = 10107
AND y.attribute_id(+) = 10008
AND z.attribute_id(+) = 10103
AND external_reference ='07920490103'
If I run this it takes less than a second in TOAD, when mapped in OWB it takes ages. 10:1 is a conservative estimate. In reality it takes 15-20 minutes. CSI_IEA_VALUES has 30 million rows CSI_ITEM_INSTANCES has 500,000 rows.
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Business rules to implement - BEST way - triggers and mutating table

I have the following table where it has Foreign Key defined on itself(self reference for parent_id column which can be null or valid site_id)
create table test_virtual_site
site_id number CONSTRAINT site_id_pk primary key,
parent_id number CONSTRAINT parent_site_id_unq UNIQUE ,
closed_date date default NULL ,
CONSTRAINT check_self_ref CHECK(parent_site_id <> site_id), --avoid self refernce
CONSTRAINT check_valid_site foreign key(parent_site_id) references test_virtual_site(site_id)
I have the following business rules to implement and my problem is related to their implementation
1)     A check should be made that Site_id specified as parent_id should not be a child of any other store (parent should have its parent_id column as NULL)
Site_id Parent_id
1
2 1
3 2 =>NOT VALID 2 is a child of another store
2)     Parent is not closed
Site_id Parent_id Closed_date
1 10-May-2005
3     1 =>NOT VALID 1 is a closed
3)
when parent store is closed - updated so at closed_date is not null
Want to set the parent_id as NULL for the child store.
OR
SET the closed_date for child store too same as the parent_store.
Example
Site_id Parent_id Closed_date
1
1 2
Update test_virtual_site
SET closed_date = sysdate
Where site_id = 1 ;
Through Trigger
Site_id Parent_id Closed_date
1     22-Mar-06
1 2 22-Mar-06
OR
Site_id Parent_id Closed_date
1     22-Mar-06
1
When I am trying to do the above mentioned through constraints I am running into mutating trigger problem. Can you please guide me what is the best way to handle the above-mentioned scenarios.
I am aware that I can avoid the 3rd problem using the following
-- - Initialize an array in the before statement trigger.
-- - Add the processed rowid to the array in the after row
-- trigger.
-- - In the after statement trigger: get each rowid from the
-- array and process it. When all rowids are processed, clear
-- the array.
BUT for 1 and 2 I need to look at the parent specified , the parent exists in the same table BUT I can not perform the lookup from the BEFORE INSERT ROW LEVEL trigger but I want to ensure at the row level , so if the parent store is closed or parent specifed itself is a child(not permissible) I want to rollback the insert RAISE_APPLICATION_ERROR.
Can you please guide me what is the best way to handle the above mentioned conditions .

I have the following table where it has Foreign Key defined on itself(self reference for parent_id column which can be null or valid site_id)
create table test_virtual_site
site_id number CONSTRAINT site_id_pk primary key,
parent_id number CONSTRAINT parent_site_id_unq UNIQUE ,
closed_date date default NULL ,
CONSTRAINT check_self_ref CHECK(parent_site_id <> site_id), --avoid self refernce
CONSTRAINT check_valid_site foreign key(parent_site_id) references test_virtual_site(site_id)
I have the following business rules to implement and my problem is related to their implementation
1)     A check should be made that Site_id specified as parent_id should not be a child of any other store (parent should have its parent_id column as NULL)
Site_id Parent_id
1
2 1
3 2 =>NOT VALID 2 is a child of another store
2)     Parent is not closed
Site_id Parent_id Closed_date
1 10-May-2005
3     1 =>NOT VALID 1 is a closed
3)
when parent store is closed - updated so at closed_date is not null
Want to set the parent_id as NULL for the child store.
OR
SET the closed_date for child store too same as the parent_store.
Example
Site_id Parent_id Closed_date
1
1 2
Update test_virtual_site
SET closed_date = sysdate
Where site_id = 1 ;
Through Trigger
Site_id Parent_id Closed_date
1     22-Mar-06
1 2 22-Mar-06
OR
Site_id Parent_id Closed_date
1     22-Mar-06
1
When I am trying to do the above mentioned through constraints I am running into mutating trigger problem. Can you please guide me what is the best way to handle the above-mentioned scenarios.
I am aware that I can avoid the 3rd problem using the following
-- - Initialize an array in the before statement trigger.
-- - Add the processed rowid to the array in the after row
-- trigger.
-- - In the after statement trigger: get each rowid from the
-- array and process it. When all rowids are processed, clear
-- the array.
BUT for 1 and 2 I need to look at the parent specified , the parent exists in the same table BUT I can not perform the lookup from the BEFORE INSERT ROW LEVEL trigger but I want to ensure at the row level , so if the parent store is closed or parent specifed itself is a child(not permissible) I want to rollback the insert RAISE_APPLICATION_ERROR.
Can you please guide me what is the best way to handle the above mentioned conditions .

Best way to create a table based on another table

Hello,
I am trying to create a table based on another table with all the data in it. It has large data.
create table <tablename> as select * from table1.
Is this the best way of doing it or is there any other way. please advice.
thanks

I am suggested to create new table as
create table <newtable> as
select * from <oldtable> where rownum < 1;
then
alter table <newtable> compress;
then
insert /*+ append */ into <newtable> as select * from <oldtable>;
but i getting an error saying missing values key words ora- 00926.
please advice

Best way to update a table with disinct values

Hi, i would really appreciate some advise:
I need to reguarly perform a task where i update 1 table with all the new data that has been entered from another table. I cant perform a complete insert as this will create duplicate data every time it runs so the only way i can think of is using cursors as per the script below:
CREATE OR REPLACE PROCEDURE update_new_mem IS
tmpVar NUMBER;
CURSOR c_mem IS
SELECT member_name,member_id
FROM gym.members;
crec c_mem%ROWTYPE;
BEGIN
OPEN c_mem;
LOOP
FETCH c_mem INTO crec;
EXIT WHEN c_mem%NOTFOUND;
BEGIN
UPDATE gym.lifts
SET name = crec.member_name
WHERE member_id = crec.member_id;
EXCEPTION
WHEN NO_DATA_FOUND THEN NULL;
END;
IF SQL%NOTFOUND THEN
BEGIN
INSERT INTO gym.lifts
(name,member_id)
VALUES (crec.member_name,crec.member_id);
END;
END IF;
END LOOP;
CLOSE c_mem;
END update_new_mem;
This method works but is there an easier (faster) way to update another table with new data only?
Many thanks

>
This method works but is there an easier (faster) way to update another table with new data only?
>
Almost anything would be better than that slow-by-slow loop processing.
You don't need a procedure you should just use MERGE for that. See the examples in the MERGE section of the SQL Language doc
http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm
MERGE INTO bonuses D
   USING (SELECT employee_id, salary, department_id FROM employees
   WHERE department_id = 80) S
   ON (D.employee_id = S.employee_id)
   WHEN MATCHED THEN UPDATE SET D.bonus = D.bonus + S.salary*.01
     DELETE WHERE (S.salary > 8000)
   WHEN NOT MATCHED THEN INSERT (D.employee_id, D.bonus)
     VALUES (S.employee_id, S.salary*.01)
     WHERE (S.salary <= 8000);

Best way to update custom table

Hello experts,
Iu2019m writing a report program and after pulling data from a custom table Iu2019m modifying certain fields within internal table and then eventually update custom table. The way Iu2019m updating custom table is working fine. However Iu2019m concern about performance issues because Iu2019m doing update on custom table within loop.
Here is my code for reference.
*&      Form update_contracts
      text
--> p1        text
<-- p2        text
FORM update_contracts .
Update record in an internal table first
loop at izsc_compliance into wa_zsc_compliance..
    wa_zsc_compliance-zapproval = c_accepted.
    wa_zsc_compliance-CHANGED_DT = sy-datum.
    wa_zsc_compliance-CHANGED_TM = sy-uzeit.
    wa_zsc_compliance-CHANGED_BY = sy-uname.
    modify izsc_compliance from wa_zsc_compliance index sy-tabix.
    write:/ sy-tabix, wa_zsc_compliance-vbeln_new, wa_zsc_compliance-zapproval.
    if p_test is initial.
      move wa_zsc_compliance to zsc_compliance.
      update zsc_compliance.
    endif..
endloop.
Write records to database
if p_test = 'X'.
    skip.
    write:/ 'Test mode'.
endif.
ENDFORM.                    " update_contracts
Iu2019m not certain if there is any better way by not doing update within loop and update custom table outside this loop.
Many thanks in advance.

Hi,
Yes, there is a better way to update the custom table. That will be more performance oriented and will be a much cleaner approach. As, I am not much aware of the custom table structure which you have in your program, the best way that I can suggest is to remove the update statement from that check. I guess you are checking against the mode - test or production. Once you have done the check, put the selected entries in an internal table which is same as database table. And then in a single command - a single array operation as it is commonly called, you can update the custom table.
Have a look at the following link
[Overwriting Several Lines Using an Internal Table|http://help.sap.com/saphelp_bw33/helpdata/en/fc/eb3a94358411d1829f0000e829fbfe/content.htm]
[Inserting or Changing Lines|http://help.sap.com/saphelp_bw33/helpdata/en/fc/eb3ac8358411d1829f0000e829fbfe/content.htm]
You can also scan the forum for multiple links and references and sample examples.
Hope this will help. The above approach will be much more performance oriented and will help to optimize. Also, check where exactly you are providing the locking feature if at applicable in your business functionality.
Regards,
Samantak.

Best way to clone a table?

Hi,
What is the best way to clone an existing table definition?
What I mean is, I want to do the following:
create table tab2 as
select * from tab1;
delete from tab2;
commit;
But clearly this involves copying all the data and then delete it. Is there a more efficient way?
Another alternative I could think of is:
create table tab2 as
select * from tab1 where rownum < 2;
delete from tab2;
commit;
This would copy only one row instead of all the rows in tab1. This is clearly much more efficient than the first approach, but I still don't like the idea of copying the data and deleting it.
I am sure there would be a "cleaner" way. Any ideas?
Thanks in advance,
Rajesh

Hi Justin,
My work involves generating statistics by running various queries. So, I have written a few procedures that generate the statistics and insert into certain tables. Usually before starting to generate a new round of stats, I take back up of the previously generated data like this.
Approach I:
alter table summary_tab rename to summary_tab_20th;
create table summary_tab as
select * from summary_tab_20th
where rownum < 2;
delete from summary_tab;
commit;
Of course, another alternative I have is the following:
Approach II:
create table summary_tab_20th as
select * from summary_tab;
delete from summary_tab;
commit;
But I thought this is inefficient when compared to Approach I because it copies ALL the data from summary_tab to summary_tab_20th and then deletes ALL the data from summary_tab.
However, one disadvantage with Approach I is that everytime I do this the stored procedure gets invalidated and I have to recompile it.
So, that is where I stand. If all this looks very dirty, please suggest how I can 'clean up' my process :-)
Thanks,
Rajesh

Best way to insert a table into image with high resolution for web?

I've tried inserting a table from Excel into Photoshop and making a jpeg and gif out of it, but when I upload it to the web the resolution is terrible.
Any ideas on how I can make get a table into an image? It's a bit too complex to create with HTML.

Well, you are leaving out a lot of info.
a: how are you saving it in Photoshop? What file type/compression amount, etc.
b: how are you uplaoding it - where are you uploading it - are you uploading JUST the image, or are you uploading the image within an .html document?
One thought, if you are JUST uploading it as an image, then trying to view it in a browser, if the image is larger than the viewport of the browser, some browsers will automatically rezie the image to fit visually into the viewport. More than likely, this resizing could be causing image distortion. Imagine it like when you zoom in/out in Photoshop - (unless you are using the accelerated graphic gui option in PS preferences), any zoom level outside of 25%, 50%, or 100% will cause visual distortion.
Give a link to where you have uploaded the image (or whatever you are talking about). Like I said, there are other things to consider as to why this is happening.

Best Way to Fill in a Shape

I have the following graphic:
It was actually a font originally but I converted it to paths. I'm wondering what is the best way to go about filling this in (so I can put color between the black outline)? It seems as though when I change the fill, the outline of the graphic is what changes. Sorry if this is obvious but I searched and couldn't find a reasonable answer (maybe I'm phrasing it wrong?).

[ / Off Topic ]
DocPixel-BMW wrote:
I'm only mentioning this BECAUSE of the new Help file system, and I think it would be to Adobe's advantage NOT to unnecessarily add information that is neither helpful, or even wrong. What kind of Help system is that going to be in a year or so. Even within these forums you have to wade through a lot of misinformation to find a correct solution... regardless of an answer being promoted to "correct" or not.
To my knowledge, Not ALL forum posts are linked to the help files, only those marked as "[i] Community Help" and begin with a generic first post as "This question was posted in response to the following article:" , plus the related help page name, however without the product name involved.
You are however correct that this whole system is a bad idea and is and will be a big mess. If these posts are unmoderated they will be a mess, with all types of garbage, if Adobe wanted to do this approach then at a minimum they need full-time people who monitor these related threads and clean them up and provide proper assistance and correct answers from with in Adobe themselves. Even if you use the search feature that is apart of "Adobe Community Help - Search Field" you get returns from third party sites, a lot of times the first return is from a 3rd part site, not just within the help docs themselves. How is this better than just googling? If I search Adobe I want only Adobe, if I want otherwise then I know enough to just google my queries. This whole system was certainly ill conceived and sent into the wild, resulting in a mess now and in the future.

Best way to fill this drawing I made.

Take a look at this drawing its lots of lines basically. I need to fill it all with one color and I need to keep all the lines. What the best way to get this object filled without losing the lines and shape?

If those are all separate graphics, ungroup them until they are all one on the same layer, make sure there are no gaps, and then use the fill tool in each section. If you need to retain them as separate graphics, then copy them and do this to the copy and then take the fill you create and place it on a lyaer beneath the orginal.
If the approach offered isn't going to work, explain how you created this.

Best way to fill a table where some row will already exist

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