content_image/867462.jpg
<img src='content_image/867462.jpg'>

Expressions can be used at several points in SQL statements, such as in the ORDER BY  or HAVING clauses of SELECT  statements, in the WHERE  clause of a SELECT , DELETE , or UPDATE  statement, or in SET  statements. Expressions can be written using values from several sources, such as literal values, column values, NULL , variables, built-in functions and operators, loadable functions, and stored functions (a type of stored object). 

