Does sql loader erase records?

When I use the sql loader for an existing table, does it clear the table of records and copy everything over...or does it simply add records? I don't want to go into the table and change everything w/o first finding out. Thanks for the help.
Cary =)

It depends on what you've specified in the control file. You can specify commands like insert, replace, truncate and append. I suggest you read the Oracle Utilities manual for your particular version for more information. There's also some good examples in the manuals. You can find Oracle manuals online at http://tahiti.oracle.com.
I don't want to go into the table and change everything w/o first finding out. I hope this statement doesn't mean you try things in a production environment without testing them first.

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http://docs.oracle.com/cd/B10500_01/server.920/a96652/ch05.htm
http://www.orafaq.com/wiki/SQL*Loader_FAQ

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Hello All,
I want to load records into a table using SQL Loader. I want to do the following(using a column in the data file),
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Hi Kannan,
Kannan B wrote:
Hello All,
I want to load records into a table using SQL Loader. I want to do the following(using a column in the data file),
1. If the flag is I insert the record.
2. If the flag is U update the record.
3. If the flag is D delete the record.
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Thanks,
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------- 8< -------
options (errors=5,SILENT=(HEADER, FEEDBACK),direct=true)
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discardmax 0
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fields terminated by "," optionally enclosed by "##"
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------- 8< -------
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S

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Use CHAR instead aof VARCHAR
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second_id,
third_id,
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http://download-west.oracle.com/docs/cd/A87860_01/doc/server.817/a76955/ch05.htm#20324

SQL Loader deletes data, after reporting a file not found error

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Try this.
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846797 wrote:
Does SQL Loader in direct mode always bypass the writing of redo logs ?
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Hi
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Pl do not post duplicates - sql Loader Performance
Srini

SQL Loader Constraints with Column Objects and Nested Tables

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I just noticed that my email is wrong. If you can help, plese send email to [email protected]
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Daniel,
I appreciate your response alot.
Now a follow on. You say that SQL*Loader is the fastest way to get data into Oracle Spatial even though the conventional path. How does SQL*Loader do this? Doesn't it use OCI?
I just can't help but think that coverting my data to SQL*Loader format, and then having it parse it and send it to the database in some form must be slower than me just sending whatever SQL Loader sends to the DB myself using OCI. Am I missing something?
The SQL Loader documentation seems to suggest that SQL*Loader just turns the input into alot of INSERT stateemnts. If so, can't I just do this?
My performance with OCI and INSERT statements isn't very good, but I believe I am doing one transaction per insert. Might I be as well off to concentrate on fine tuning my OCI based code using INSERTs?
I will actually do some time tests myself, but I would appreciate your opinion.
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/Magnus Hornstrom
mailto:[email protected]

Daniel,
I appreciate your response alot.
Now a follow on. You say that SQL*Loader is the fastest way to get data into Oracle Spatial even though the conventional path. How does SQL*Loader do this? Doesn't it use OCI?
I just can't help but think that coverting my data to SQL*Loader format, and then having it parse it and send it to the database in some form must be slower than me just sending whatever SQL Loader sends to the DB myself using OCI. Am I missing something?
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Good evening,
I am following the example given in the 2 Day DBA document chapter 8 section 16.
In step 5 of 7, EM does not allow me to specify the destination of the SQL Loader log file to be on a mapped network drive.
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DDL (generated using SQL developer, you may want to change the space allocated to be less)
CREATE TABLE "NICK"."PURCHASE_ORDERS"
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SEGMENT CREATION DEFERRED PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE
    INITIAL 67108864
TABLESPACE "USERS" ;
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1, Office Equipment, 25-MAY-2006, 1201, 13-JUN-2006
2, Computer System, 18-JUN-2006, 1201, 27-JUN-2006
3, Travel Expense, 26-JUN-2006, 1340, 11-JUL-2006
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log in, select data movement -> Load Data from User Files
Automatically generate control file
(enter host credentials that work on your machine)
continue
Step 1 of 7 ->
Data file is located on your browser machine
"Z:\Documentation\Oracle\2DayDBA\Scripts\Load.dat"
   click next
step 2 of 7 ->
Table Name
nick.purchase_orders
click next
step 3 of 7 ->
click next
step 4 of 7 ->
click next
step 5 of 7 ->
Generate log file where logging information is to be stored
Z:\Documentation\Oracle\2DayDBA\Scripts\Load.LOG
Validation Error
Examine and correct the following errors, then retry the operation:
LogFile - The directory does not exist.

Hi John,
But, i did'nt found any error when i am going the same what you did.
My Oracle Version is 10.2.0.1 and using Windows xp. See what i did and i got worked
1.I created one table in scott schema :
SCOTT@orcl> CREATE TABLE "PURCHASE_ORDERS"
2 (
3      "PO_NUMBER"      NUMBER NOT NULL ENABLE,
4      "PO_DESCRIPTION" VARCHAR2(200 BYTE),
5      "PO_DATE" DATE NOT NULL ENABLE,
6      "PO_VENDOR" NUMBER NOT NULL ENABLE,
7      "PO_DATE_RECEIVED" DATE,
8      PRIMARY KEY ("PO_NUMBER") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS NOCOMPRESS LOGGING TABLESPACE "USERS" ENABLE
9 )
10 TABLESPACE "USERS";
Table created.I logged into em Maintenance-->Data Movement-->Load Data from User Files-->My Host Credentials
Here i total 3 text boxes :
1.Server Data File : C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\USERS01.DBF
2.Data File is Located on Your Browser Machine : z:\load.dat <--- Here z:\ means other machine's shared doc folder; and i selected this option (as option button click) and i created the same load.dat as you mentioned.
3.Temporary File Location : C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\ <--- I did'nt mentioned anything.
Step 2 of 7 Table Name : scott.PURCHASE_ORDERS
Step 3 of 7 I just clicked Next
Step 4 of 7 I just clicked Next
Step 5 of 7 I just clicked Next
Step 6 of 7 I just clicked Next
Step 7 of 7 Here it is Control File Contents:
LOAD DATA
APPEND
INTO TABLE scott.PURCHASE_ORDERS
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
PO_NUMBER INTEGER EXTERNAL,
PO_DESCRIPTION CHAR,
PO_DATE DATE,
PO_VENDOR INTEGER EXTERNAL,
PO_DATE_RECEIVED DATE
And i just clicked on submit job.
Now i got all 3 rows in purchase_orders :
SCOTT@orcl> select count(*) from purchase_orders;
COUNT(*)
         3So, there is no bug, it worked and please retry if you get any error/issue.
HTH
Girish Sharma

Does sql loader erase records?

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