Oracle Merge Rows: Techniques & Examples

There are several ways to merge rows of data in Oracle.

1. Aggregate functions can be used to combine row data, such as using SUM to calculate the total of a column or COUNT to calculate the number of rows in a column.
2. By using the GROUP BY clause, you can group the data based on one or multiple columns and then aggregate the groups using functions. For example, you can group the data by the values in a column and calculate the total for each group using the SUM function.
3. You can use the MERGE statement to combine data from two or more tables into one table. The MERGE statement allows you to merge data from a source table into a target table based on specified conditions, allowing you to update existing data or insert new data if already present in the target table.
4. By using a join query, you can combine data from multiple tables together by specifying a connection condition to merge data from two or more tables based on the values in a specific column.

The above are common methods for merging rows in Oracle, the specific method used will depend on the needs and data structure.