How to write not equal to a certain condition in sql-SQL-php.cn

The <> operator is used in SQL to indicate that it is not equal to a certain condition. The example is as follows: SELECT * FROM table_name WHERE column_name <> 'value';

How to express not equal to a certain condition in SQL

In SQL, use the <> operator to express not equal to a certain condition conditions. <> Operator indicates that two expressions are not equal.

Example:

SELECT * FROM table_name WHERE column_name <> 'value';

This query will select all columns from the table_name table that satisfy the column_name column not equal to value The row of the condition.

Other operators:

In addition to the <> operator, there are other operators that can be used to compare values. These include:

• ##=: equal to
• !=: not equal to
• : less than
• >: greater than
• : less than or equal to
• >= : Greater than or equal to

Examples using these operators:

SELECT * FROM table_name WHERE column_name = 'value';
SELECT * FROM table_name WHERE column_name != 'value';
SELECT * FROM table_name WHERE column_name < 10;
SELECT * FROM table_name WHERE column_name > 10;
SELECT * FROM table_name WHERE column_name <= 10;
SELECT * FROM table_name WHERE column_name >= 10;

The above is the detailed content of How to write not equal to a certain condition in sql. For more information, please follow other related articles on the PHP Chinese website!