Sql syntax where is not equal

If we run following SQL statement for the equal operator it will return records where empid equals to 1. In SQL, not equal operator is used to check whether two expressions equal or not. If we run following SQL statement for not equal operator it will return a records where empid not equals to 1. When we execute the above SQL not equal operator query, we will get the result like as shown below.

If we run following SQL statement for not equal operator it will return records where empid not equals to 1. When we execute the above SQL, not equal operator query we will get the result like as shown below. In SQL, greater than operator is used to check whether the left-hand operator is higher than the right-hand operator or not.

If left-hand operator higher than right-hand operator then condition will be true and it will return matched records. If we run following SQL statement for greater than operator it will return records where empid greater than 2. When we execute the above SQL greater than the operator query, we will get the result like as shown below.

In SQL, less than operator is used to check whether the left-hand operator is lower than the right-hand operator or not. If left-hand operator lower than right-hand operator then condition will be true and it will return matched records. If we run following SQL statement for less than operator it will return records where empid less than 2. Suppose we want to exclude a particular product from the output. We need to use string or varchar data type with a single quote in the where clause.

If we do not specify the expression in a single quote, we get the following error message. It treats the expressions as a table column name without the single quote.

We can specify multiple conditions in a Where clause to exclude the corresponding rows from an output. Execute the following code to satisfy the condition.

It helps to demonstrate the situation quickly. In the actual execution plan of this query, we can see SQL Not Equal predicates along with a Non-clustered index scan operator. We get the same number of rows in this as well in comparison with a previous query using SQL Not Equal operator. This time query took less time to return the same number of rows. Post as a guest Name. Email Required, but never shown.

The Overflow Blog. Podcast Explaining the semiconductor shortage, and how it might end. Does ES6 make JavaScript frameworks obsolete? Featured on Meta. Now live: A fully responsive profile. Linked Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled. Accept all cookies Customize settings.