Is not vs SQL Server?

Question

In terms of performance , the two queries almost the same. if you can check the actual execution plan in SQL Server, there is no difference of the two query. NOT is a negation and the other (<>) is an operator used for comparison. 23 нояб. 2015 г.

What does <> indicate in SQL Server?

<> operator means not equal to in MS SQL. It compares two expressions (a comparison operator). When you compare nonnull expressions, the result is TRUE if the left operand is not equal to the right operand; otherwise, the result is FALSE. If either or both operands are NULL, see the topic SET ANSI_NULLS (Transact-SQL).

What is difference between <> and NOT operators?

Both are used in Where clause of an sql query. will get you records with all employees with countries other than Germany. The != operator similarly checks if the values of two operands are equal or not, if values are not equal then condition becomes true.

IS NOT NULL in SQL vs <>?

Is not null determines if the object/record being inspected is a true null value or not (no data). <> '' means is not an empty string, so the record does contain data (that there is an empty string) and is not actually null. So a query with is not null will return records with a value of string.

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