What Is Not Equal in SQL
The SQL Not Equal operator belongs to the group of comparison operators which means it can be used to compare expressions. In this case, an expression is a combination of symbols that has a single data value. It can be variables, constants, columns or scalar functions.
As SQL Not Equal is a binary operator, it cannot be used to compare more than two expressions at once.
- Simplistic design (no unnecessary information)
- High-quality courses (even the free ones)
- Variety of features
- Nanodegree programs
- Suitable for enterprises
- Paid certificates of completion
- Professional service
- Flexible timetables
- A variety of features to choose from
- Professional certificates of completion
- University-level courses
- Multiple Online degree programs
- Great user experience
- Offers quality content
- Very transparent with their pricing
- Free certificates of completion
- Focused on data science skills
- Flexible learning timetable
Return Values of SQL Not Equal
SQL Not Equal is a boolean operator. That means its return value can be either
True (if one expression in SQL does not equal the other) or
False (if the expressions are equal).
If either of the expressions has a NULL value, the SQL Not Equal will also return
Two Types of Syntax for Not Equal
There are two ways to write the SQL Not Equal operator:
exp <> exp exp != exp
Both of them achieve the same result. However, we recommend you to use the first type of syntax, as it complies with the ISO standard, while the second one does not.
Latest Udacity Coupon Found:
75% OFF COURSES
Udacity Black Friday Offer
The best time to save on Udacity courses is now - follow this coupon to access a 75% Udacity Black Friday discount & enjoy learning at a very low cost!