Differbetween
Null
Difference Between null and undefined in JavaScript
null is an assigned value. It means nothing. undefined means a variable has been declared but not defined yet. null is an object.What is difference be...
Difference Between Zero and Null
"Zero" is a value. It is the unique, known quantity of zero, which is meaningful in arithmetic and other math. "Null" is a non-value. It is a "placeho...
Difference Between null and empty
The main difference between null and empty is that the null is used to refer to nothing while empty is used to refer to a unique string with zero leng...
left join with null values in right table
How get NULL values in join?IS NULL left join?How do you insert null values in a table?How do I return rows left table not found in right table?Can we...