How to import oracle database

Data import method: 1. Use the SQLLoader utility: prepare data files, create control files, and run SQLLoader; 2. Use IMP/EXP tools: export data, import data. Tip: 1. Recommend SQL*Loader for large data sets; 2. The target table should exist and the column definition matches; 3. After importing, data integrity needs to be verified.

Oracle database import method

How to import data:

There are two main ways to import data: use the SQL*Loader utility or use the IMP/EXP tool.

Import data using the SQL*Loader utility

step:

1. Prepare data files: Make sure that the data files are in plain text format and that the column separators are consistent with those defined in the database.
2. Create Control File: Create a text file, specifying the location, column mapping, and loading options for the data file.
3. Run SQL*Loader: Load the data using the following command:

 <code>sqlldr username/password@servicename control=control_file_name</code>

Import data using IMP/EXP tools

step:

1. Export data: Export data to a dump file using the EXP tool:

 <code>exp username/password@servicename file=export_file_name tables=table1,table2</code>

2. Import data: Use the IMP tool to import data from a dump file:

 <code>imp username/password@servicename file=export_file_name</code>

Other tips:

• For large datasets, the SQL*Loader utility is recommended because it is faster and more efficient than IMP/EXP.
• When importing data, make sure the target table exists and has column definitions that match the columns in the data file.
• After importing the data, please verify the integrity and accuracy of the data.

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