INTRODUCTION TO ORACLE Lynnwood Brown System Managers LLC Data Loading Copyright System Managers LLC 2003 all rights reserved.

DATA LOADING Use the EXPORT/IMPORT utilities to move bulk data from one Oracle database into another Oracle database. Logical backup – Saves the data and the DDL used to create the database objects Migration Tool Online documentation - C:\> exp{imp} help=y Data can also be loaded using SQL*PLUS “INSERT” commands or the Oracle utility SQL*LOADER.

DATA LOADING Types Of Exports. Full Export –EXP system/manager file = exp.dat full = y log = exp.log User Level Export –EXP system/manager file = exp.dat owner = scott log = exp.log Table Level Export –EXP scott/tiger file = exp.dat TABLES=(emp,dept) log = exp.log

DATA LOADING Types Of Imports. Full Import –IMP system/manager file = exp.dat full = y log = imp.log commit = y User Level Import –IMP system/manager file = exp.dat fromuser=scott touser=scott log = imp.log commit = y Table Level Import –IMP scott/tiger file = exp.dat TABLES=(emp.dept) log = imp.log commit = y

DATA LOADING cont. SQL*LOADER - Oracle utility used to load external file data into Oracle database tables Used when large amounts of data must be loaded. Loads data contained in a data file into one or more tables Requires a SQL*LOADER control file Copyright System Managers LLC 2003 all rights reserved.

DATA LOADING cont. SQL*LOADER Syntax: C:\> sqlldr scott/tiger control=my_control_file.ctl log=my_load.log Data File Contents – file name = ubs.dat 930|1058|Edward S.Eng|ibm 931|2157|John Ford|hp 932|1457|Melanie Goldman|msft 933|1657|Jane Williams|dell Copyright System Managers LLC 2003 all rights reserved.

DATA LOADING cont. SQL*LOADER Control File – Tells the loader how to how to interpret the data file: LOAD DATA INFILE 'ubs.dat' BADFILE 'ubs2.bad' DISCARDFILE 'ubs2.dsc' APPEND INTO TABLE ubs.table_customer FIELDS TERMINATED BY '|'OPTIONALLY ENCLOSED BY '"' TRAILING NULLCOLS (CUST_NO, SITE_NO, CUST_NAME,SITE_ ABBREV)

DATA LOADING cont. SQL*LOADER Control File – Tells the loader how to load the data: INFILE – File containing the data to be loaded BADFILE – Records that are rejected go into this file DISCARDFILE – Records that do not meet a loading criteria Data can be appended onto existing data, inserted or replaced - APPEND/INSERT/REPLACE