Learn how to use the MONTHS_BETWEEN SQL function to return the number of months that have passed between two date values.
- [Instructor] The Oracle months_between function…allows us to calculate how may months have passed…between two distinct dates.…Let's see it in action.…We'll start by selecting the current sysdate…and the hire_date column from the employees table.…Note that since sysdate is a pseudocolumn,…that is, it is calculated on the fly,…and returns the current date and time,…of the Oracle database server,…while hire_date is an actual column of the employees table,…the output will show us a repeating sysdate value…for each row returned,…while the hire_date column will actually show us…the date when the employee was hired.…
That's because, again, sysdate is calculated on the fly.…It's a pseudocolumn, not part of the table,…while hire_date is indeed retrieved…from the employees table.…Okay, so back to business.…So let's say we were calculate how many months have passed…between the current date, sysdate,…and the hire date of the employee.…In order accomplish that, we simply add…a months_between function to our query.…Specifying as function parameters…
Note: This training course is appropriate for beginning database developers with no prior experience with SQL or Oracle.
- Using Oracle SQL*Developer, the free development environment
- Selecting data from tables
- Filtering data
- Using functions to manipulate data
- Joining data from tables
- Creating tables
- Updating values
- Truncating data
- Grouping and ordering result sets
- Working with primary keys
- Checking constraints
Skill Level Beginner
Database Foundations: Core Conceptswith Adam Wilbert2h 14m Beginner
Database Foundations: Administrationwith Adam Wilbert1h 14m Beginner
Oracle 12c Database: Administrationwith David Yahalom3h 58m Beginner
1. Introduction to SQL
2. Preparing the Course Environment
Downloading the course VM2m 16s
3. Using Oracle SQL Developer
4. Basic SELECT Queries
5. String, Number, and Date Functions
6. Joining Table Data
7. Manipulating Data
8. Grouping Data
9. Advanced Topics
Next steps1m 33s
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