Wednesday, July 7, 2010

SQL Loader Overview

Your Ad Here



SQL*Loader is a bulk loader utility used for moving data from external files into the Oracle database. It supports various load formats, selective loading, and multi-table loads.

Below are the examples of loading data into Tables using different methods

Load Fixed length Data Records
LOAD DATA
INFILE *
INTO TABLE load_delimited_data
FIELDS TERMINATED BY "," OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS
( data1,
data2
)
BEGINDATA
11111,AAAAAAAAAA
22222,"A,B,C,D,"

Load Positional Data Records
LOAD DATA
INFILE *
INTO TABLE load_positional_data
( data1 POSITION(1:5),
data2 POSITION(6:15)
)
BEGINDATA
11111AAAAAAAAAA
22222BBBBBBBBBB

Skip First 2 Header Records while Loading
LOAD DATA
INFILE *
INTO TABLE load_positional_data
SKIP 2
( data1 POSITION(1:5),
data2 POSITION(6:15)
)
BEGINDATA
NNNNNNNNNNNNNNN
UUUUUUUUUUUUUUU
11111AAAAAAAAAA
22222BBBBBBBBBB

Loading Data into Multiple Tables
LOAD DATA
INFILE *
REPLACE
INTO TABLE emp
WHEN empno != ' '
( empno POSITION(1:4) INTEGER EXTERNAL,
ename POSITION(6:15) CHAR,
deptno POSITION(17:18) CHAR,
mgr POSITION(20:23) INTEGER EXTERNAL
)
INTO TABLE proj
WHEN projno != ' '
( projno POSITION(25:27) INTEGER EXTERNAL,
empno POSITION(1:4) INTEGER EXTERNAL
)

Skip Certain Columns while Loading DataLOAD DATA
TRUNCATE INTO TABLE T1
FIELDS TERMINATED BY ','
( field1,
field2 FILLER,
field3
)

Erroneous data after loading with SQL Loader

Our Database is created with below settingsCHARACTER SET "UTF8"
NATIONAL CHARACTER SET "WE8ISO8859P1"
NLS_LANGUAGE = AMERICAN
NLS_TERRITORY = AMERICA

Include below code in control file to avoid junk data load using SQL loaderLOAD DATA
CHARACTERSET WE8ISO8859P1
APPEND INTO TABLE XXAP_GENERIC_INVOICES
FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS
(operating_unit
,vendor_number
)

Using SQL Functions for Loader Columns
LOAD DATA
APPEND INTO TABLE
XXAR_INV_AT
FIELDS TERMINATED BY ""
OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS
(
DESCRIPTION "NVL(:DESCRIPTION,'Migrated from Legacy')",
TRX_DATE "TO_CHAR(TO_DATE(:TRX_DATE,'YYYYMMDD'),'DD-MON-YYYY')" ,
GL_DATE "TO_CHAR(TO_DATE(:GL_DATE,'YYYYMMDD'),'DD-MON-YYYY')" ,
TAX_RATE "REPLACE(:TAX_RATE,'%','')",
STAGING_TABLE_ID "XXAR_INV_AT_S1.NEXTVAL",
CREATION_DATE SYSDATE,
LAST_UPDATE_DATE SYSDATE
SOURCE "TRIM(REPLACE(:SOURCE,(SUBSTR(:SOURCE,LENGTH(:SOURCE),1)),''))"
)
Your Ad Here

3 comments:

  1. This post gives SQL leader overview. I find this post informational. The syntax doesn't seem difficult so one can easy learn them. I think you done a fantastic work. I am going to implement the code in my application. Thanks for the information.

    ReplyDelete
  2. This site has lots of advantage.I found many interesting things from this site. It helps me in many ways.Thanks for posting this again.For more details please visit our website..
    Oracle Fusion Training Institute


    ReplyDelete
  3. Good content in this post and site. We need more fresh and good content like this. Thanks for posting great stuff it’s very useful to me
    Oracle Fusion HCM Technical Online Training

    ReplyDelete