Best Oracle SQL Tools to Buy in October 2025
Oracle 12c: SQL
Murach's Oracle SQL and PL/SQL for Developers
OCE Oracle Database SQL Certified Expert Exam Guide (Exam 1Z0-047) (Oracle Press)
- NEW & MINT CONDITION: PREMIUM QUALITY GUARANTEED!
- SAME-DAY DISPATCH: ORDER BY 12 NOON FOR FAST DELIVERY!
- WORRY-FREE SHOPPING: GUARANTEED PACKAGING & EASY RETURNS!
Easy Oracle PLSQL Programming: Get Started Fast with Working PL/SQL Code Examples (Easy Oracle Series)
Oracle PL/SQL Best Practices: Write the Best PL/SQL Code of Your Life
- AFFORDABLE OPTION FOR BUDGET-CONSCIOUS READERS.
- QUALITY ASSURANCE: GOOD CONDITION FOR A RELIABLE READ.
- ECO-FRIENDLY CHOICE: SUPPORT SUSTAINABILITY THROUGH REUSE.
A Guide to SQL
Oracle SQL Developer 2.1
Study Guide for 1Z0-071: Oracle Database 12c SQL: Oracle Certification Prep
Learn SQL By Examples: Examples of SQL Queries and Stored Procedures for MySQL and Oracle Databases
Oracle SQL By Example
To select the average from row results in Oracle, you can use the AVG() function in a SQL query. This function calculates the average value of a numeric column or expression.
For example, you can use the following query to select the average of two columns named "column1" and "column2" from a table named "table_name":
SELECT AVG(column1 + column2) AS average_result FROM table_name;
This query will calculate the average of the sum of column1 and column2 for each row in the table and return the result as "average_result". You can modify the query according to your specific requirements and column names.
What is the syntax for calculating average in Oracle?
To calculate the average in Oracle, you can use the AVG() function in a SQL query. The syntax is as follows:
SELECT AVG(column_name) FROM table_name;
Where:
- AVG() is the function used to calculate the average.
- column_name is the name of the column for which you want to calculate the average.
- table_name is the name of the table that contains the column.
What is the use of the GROUP BY clause when calculating average in Oracle?
The GROUP BY clause is used in conjunction with the AVG() function in Oracle to calculate the average of a set of values that have been grouped based on a specific column or expression.
When using the GROUP BY clause, Oracle will partition the result set into groups based on the columns specified in the clause. The AVG() function can then be applied to each group to calculate the average value for each group.
This allows you to calculate the average of a subset of data within a larger dataset, providing more detailed and specific average values based on different criteria.
How to retrieve the average value from a column in Oracle?
To retrieve the average value from a column in Oracle, you can use the AVG() function. Here is an example query to retrieve the average value from a column named "column_name" in a table named "table_name":
SELECT AVG(column_name) AS average_value FROM table_name;
Replace "column_name" with the name of the column you want to find the average value for and "table_name" with the name of the table where the column is located. The query will return the average value calculated from the values in the specified column.