How to express not equal in sql

You can use "<>" or "!=" symbols in SQL to indicate inequality. These two symbols are used to check whether a field is not equal to a specified "value".

In SQL, it means not equal

In SQL, not equal can use "<>" or "!=" symbol indicates.

Use<>

<code class="sql">SELECT * FROM table_name WHERE column_name <> value;</code>

Use !=

<code class="sql">SELECT * FROM table_name WHERE column_name != value;</code>

Both symbols can be used to check fields Is not equal to the specified "value".

Example

In the following example, we use the "<>" symbol to query all records in the "customers" table where the "age" field is not equal to 30:

<code class="sql">SELECT * FROM customers WHERE age <> 30;</code>

If the "customers" table has the following data:

Then the above query will return the following results:

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