How to import oracle database into excel

Excel data can be imported into an Oracle database through the SQLLoader utility or SQL commands. SQLLoader methods include: 1. Prepare data (save as text or CSV file). 2. Create a control file (specify data files, table structure, and load options). 3. Load the data (using the SQL*Loader command). Using SQL commands requires: 1. Create a table (matching data structure). 2. Import the data (using the INSERT INTO statement).

How to import Excel data into Oracle database

Importing Excel data into Oracle database is a common task that can This is accomplished through the SQL*Loader utility or SQL commands in Oracle Database.

Preparing data using SQL*Loader

1. : Save the Excel worksheet as a text (.txt) or CSV file.
2. Create a control file: Use SQL*Loader to generate a control file that contains information about the data files, table structure, and load options.
3. Loading data: Use the SQL*Loader command to load data from a text or CSV file into an Oracle table.

SQL command

1. Create table:Create a table in the Oracle database that matches the data structure in the Excel worksheet table.
2. Importing data: Insert data from a text or CSV file into a table using the INSERT INTO statement.

Detailed explanation of steps

Use SQL*Loader

• Prepare data:Make sure there are no blank cells or special characters in the Excel worksheet. Save it as a text (.txt) or CSV file.

• Create a control file: Use the sqlldr command of SQL*Loader to generate a control file. For example:

  <code>sqlldr user/password@database control=control_file.ctl</code>

  The control file contains the following:

  • The path and name of the data file
  • The name and column definition of the table
  • Load options , such as field delimiters and quote characters

• Loading data: To load data, use the sqlldr command as shown below :

  <code>sqlldr user/password@database data=data_file.txt control=control_file.ctl</code>

Use SQL command

• Create table: Use CREATE TABLE statement creates a table that matches the data structure in the Excel worksheet. For example:

  <code>CREATE TABLE my_table (
    id INT,
    name VARCHAR2(100),
    age INT
  );</code>

• Importing data: Insert data from a text or CSV file into a table using the INSERT INTO statement. For example:

  <code>INSERT INTO my_table (id, name, age)
  SELECT *
  FROM external_data_file
  WHERE name IS NOT NULL;</code>

  Make sure external_data_file is the path and name of a text or CSV file.

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