Question: What is
best way to import a CSV file into an Oracle table? I
have a comma delimited CSV file, and I want to rub SQL
queries against the file. What are my options for
loading my CSV?
Answer: There are several ways to query
a CSV file with SQL, by loading it into an Oracle table:
- SQL*Developer: Use the SQL
Developer wizard to load the CSV file:
1. Define the empty table. (create
table . . . . )
2. Select the table in the navigation
tree.
3. Right click and select 'import data'.
4.
Follow the instructions in the wizard.
-
SQL*Loader: Use the sqlldr utility.
See my notes on
sqlldr. That page has an example of a sqlldr
parfile to load a table from a CSV.
- External Table: Define an
external table. See my notes here on
using
an external table and
creating an external table. Here is an example
control file for defining a CSV as an external table:
create directory testdir as
'u01/oracle/oradata/testdb';
create table emp_ext (
EMPNO NUMBER(4),
ENAME
VARCHAR2(10),
JOB
VARCHAR2(9),
MGR
NUMBER(4),
HIREDATE DATE,
SAL
NUMBER(7,2),
COMM
NUMBER(7,2),
DEPTNO NUMBER(2))
Organization external
(type oracle_loader
default directory testdir
access parameters (records
delimited by newline
fields terminated by ',')
location ('emp_ext.csv'))
reject limit 1000;
Alse see
external_tables as spreadsheets.
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