The examples in this article require the SCOTT schema. External Table Enhancements in Oracle Database 12c Release 1 (12.1).This article presents an overview of the enhancements to SQL*Loader in Oracle Database 12c Release 1 (12.1). However, we can always copy the data from external tables to Oracle Tables using DB links.Home » Articles » 12c » Here SQL*Loader Enhancements in Oracle Database 12c Release 1 (12.1) SQL*Loader may be the better choice in data loading situations that require additional indexing of the staging table. To parallelize this load using SQL*Loader, you would have had to manually divide your input file into multiple smaller files. This parallelism happens automatically, with no additional effort on your part, and is really quite convenient. So, when you created the external table, the database will divide the file to be read by four processes running in parallel. To make the loading operation faster, the degree of parallelism can be set to any number, e.g 4

Flow the data through a pipelined plsql function for cleansing/transformation.Load the data from a stored procedure or trigger (insert is not sqlldr).No data manipulation language (DML) operations or index creation is allowed on an external table.Do a parallel direct path load - without splitting up the input file, writing.Sort a flat file on the way into a table you want compressed nicely.Merge a flat file with an existing table in one statement.Access data in external sources as if it were in a table in the database.Verify data by selecting it from the external table nowĮxternal tables feature is a complement to existing SQL*Loader functionality. After granting appropriate permissions to the user, we can create external table like below.Ĭreate table ext_table_csv ( i Number, n Varchar2(20), m Varchar2(20) ) organization external ( type oracle_loader default directory ext_dir access parameters ( records delimited by newline fields terminated by ',' missing field values are null ) location ('file.csv') ) reject limit unlimited Create a directoryĬreate or replace directory ext_dir as ‘/home/rene/ext_dir’ - path where the source file is kept csv) on the desired location.ġ,one,first 2,two,second 3,three,third 4,four,fourth b. The data can be verified by selecting the data from the table.Now run sqlldr utility of oracle on sql command prompt as.Separated by “,” (or the delimiter we use in input file) optionally enclosed by csv as well)Īppend or Truncate (– based on requirement) into oracle tablename Infile “Mytextfile.txt” (– file containing table data, specify paths correctly, it could be. Below are 2 techniques using which the data can be loaded from Flat files to oracle tables.

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