What is the method for comparing sizes in a SQL varchar?

In SQL, comparison operators (such as >, <, =, >=, <=) can be used to compare the sizes of two varchar values. The comparison works similarly to comparing numeric values, but with strings, it is done based on alphabetical order.

For example, here is an example comparing the size of two values of varchar type.

SELECT * FROM table_name WHERE column1 > 'value';
SELECT * FROM table_name WHERE column1 < column2;

Here, both column1 and value are of type varchar, and comparisons are made using relational operators. Based on alphabetical order, ‘value’ is greater than ‘abc’ and less than ‘xyz’.