What is SQL Loader with example?

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SQL LOADER utility is used to load data from other data source into Oracle. For example, if you have a table in FOXPRO, ACCESS or SYBASE or any other third party database, you can use SQL Loader to load the data into Oracle Tables. SQL Loader will only read the data from Flat files.

How do I load SQL Loader?

To execute the SQL*Load tool, you need at least three files:

The input data file stores delimited or raw data.
The parameter file stores the location of the input/output files.
The control file contains the specification on how data is loaded.

How do I create a control file in SQL Loader?

To create the SQL*Loader control file, use a text editor such as vi or xemacs. create. In general, the control file has three main sections, in the following order: Session-wide information.

What is a control file in SQL Loader?

SQL loader control file is used to load data from CSV or flat data file to Oracle tables. It usually has extension . ctl. In the control file, we define the structure for the data file and the target table in which we want to load data with some conditions.

How do I load a csv file into SQL Loader?

Import csv into database table (SQL* Loader)

Create a table inside database which will be used for rows to import from csv file.
Create a sample csv file at OS level on your database server.
Put some dummy data into the csv file.
Save the .csv file and close it.
Create sql loader control file with .ctl extension.

Can SQL Loader create table?

The destination Oracle table must exist prior to using SQLLoader to load the CTL file. FME will not create the required table. If the table does not exist, then it can be created by opening the CTL file that FME generated.

Why SQL Loader is faster than insert?

A direct path load is faster than the conventional path for the following reasons: Partial blocks are not used, so no reads are needed to find them, and fewer writes are performed. SQL*Loader need not execute any SQL INSERT statements; therefore, the processing load on the Oracle database is reduced.

How do I run SQL Loader in SQL Developer?

In SQL Developer, click the Export Cart icon and select “loader” in the Format menu. In SQL Developer, open a connection to the Oracle Database 12c database on the Database service and execute the generated script to create the database objects.

How does SQL Loader handle special characters?

1 Answer

Ensure that your database is able to store such characters.
On your client use a character set which supports such characters.
Tell the Oracle database which character set is used by your client.

What is the use of WHEN clause in control file?

In SQL Loader Control File, you can use WHEN clause to tell SQL Loader to load the data only when the condition is true. Also, you can use the WHEN clause to load data into multiple tables.

How do I load multiple csv files in SQL Loader?

You can specify multiple input files in your control file! Provided they have the same record format, they can all go in the same table. You can do this by listing them out explicitly: infile ‘file1.

What is log file in SQL Loader?

The log file contains a detailed summary of the load. Most of the log file entries are records of successful SQL*Loader execution. However, errors can also cause log file entries. For example, errors found during parsing of the control file appear in the log file.

What is bad file in SQL Loader?

Bad file: The bad file contains rows that were rejected because of errors. These errors might include bad datatypes or referential integrity constraints. Discard file: The discard file contains rows that were discarded because they were filtered out because of a statement in the SQL*Loader control file.

Does SQL Loader disable constraints?

Direct Loads, Integrity Constraints, and Triggers But when you load data with the direct path, SQL*Loader disables some integrity constraints and all database triggers.

What is direct path load in SQL Loader?

A direct path load calls on Oracle to lock tables and indexes at the start of the load and releases them when the load is finished. A conventional path load calls Oracle once for each array of rows to process a SQL INSERT statement. A direct path load uses multiblock asynchronous I/O for writes to the database files.

What is append in SQL Loader?

APPEND – If data already exists in the table, SQL*Loader appends the new rows to it; if data doesn’t already exist, the new rows are simply loaded. REPLACE – All rows in the table are deleted and the new data is loaded. This option requires DELETE privileges on the table.

How do I load a CSV file into SQL Loader?

How do I load a text file into Oracle table using SQL Loader?

Example to Load CSV file into database table:

Place the file in D:\ folder.
Create a table in Oracle according to data in CSV file. create table scott.test(name varchar2(50),amount number,start_date date) ;
Create a control file.
Run the SQLLDR utility for import the datafile into table.
Check the table values.

How do you handle a new line character in SQL Loader?

You can replace new line, or carriage return by replacing CHAR(13) or CHAR(10) eg: REPLACE(REPLACE(‘column value’, CHAR(13),”),CHAR(10),”)…
This logic Not working.
give me a sample of the input data please.

What is the difference between bad file and discard file?

What is SQL Loader with example?