How do you read Oracle databases?

To access data from an Oracle database, you can use SQL query language. Here are some common methods for fetching data:

1. Use the SELECT statement to query data.
2. Retrieve all information from the table.
3. This will retrieve all the data from the specified table.
4. Filter data using a WHERE clause.
5. Retrieve all records from the table where the column equals a specific value.
6. This will retrieve data that meets the specified conditions.
7. Sort the data using the ORDER BY clause.
8. Retrieve all data from the table and sort it in either ascending or descending order based on the specified column.
9. This will sort in ascending (ASC) or descending (DESC) order based on the specified column.
10. Limit the number of returned data rows using the LIMIT clause.
11. Retrieve all data from the table with a limit on the number of rows.
12. This will return the data for the specified number of rows.
13. Use JOIN statement to connect multiple tables.
14. Retrieve the column names from table 1 that match with the column names in table 2.
15. This will return the columns that meet the specified conditions in both tables.
16. Use aggregate functions to calculate statistics on data.
17. Determine the number of rows in a table.
18. This will return the count result of the specified column.

These are some basic methods for retrieving data, more complex query statements can also be used based on specific requirements for data retrieval.