Prepared statement with dynamic where clause

Question

I have a search page with multiple search criteria

1. Employee Name
2. Employee Id
3. Date of joining
4. Department

etc

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Answer 1

This is easy to do without any complex or expensive logic, in a single line...

Assuming that your three variables are @name, @surname, and @gender.

Also assuming that a zero-length string will be provided when a filter is not required.

Then, your Select statement is simply:

    select * from table_name where (name = @name or @name = '') and (surname = @surname or @surname = '') and (gender = @gender or @gender = '')

That's all there is to it! No complex or expensive logic.