Oracle Pagination: 3 Effective Methods

1. Utilize the ROWNUM function for pagination. ROWNUM is a pseudocolumn in the Oracle database that represents the current row number. By combining ROWNUM, pagination functionality can be easily achieved. Pagination can be implemented by including ROWNUM in the query statement, for example:
2. Retrieve the first 10 rows from your_table ordered by column_name.
3. In the above examples, the query first sorts by the specified column, then assigns row numbers to the results, and filters based on the row numbers in the outer query to achieve pagination.
4. To paginate using the ROW_NUMBER() function: ROW_NUMBER() is a window function in Oracle database that assigns a unique row number to each row in the query result. By using the ROW_NUMBER() function, pagination can be achieved. One way to do this is by including the ROW_NUMBER() function in the query statement, for example:
5. Retrieve all columns from the first ten rows of your_table ordered by column_name.
6. In the examples above, the query statement sorts by the specified column first and assigns a unique row number to each row. Then in the outer query, it filters based on the row number to achieve a paging effect.
7. The use of OFFSET and FETCH for pagination: Oracle 12c and above support the use of OFFSET and FETCH for pagination. OFFSET specifies which row to start returning data from the result set, FETCH specifies the number of rows to return. For example:
8. Retrieve the first 10 rows from your_table in the order specified by column_name.
9. In the examples above, the query first sorts by the specified column, then uses OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY to return 10 rows of data starting from the first row, achieving a pagination effect.

Note: Replace column_name with the actual name of the column you want to sort by, and your_table with the actual name of the table. Also, choose the appropriate pagination method based on different querying needs and scenarios.