How to pass empty parameter

Im my query, there are many condition, so if Redash required full fill all condition. We can not get data for demo. I check somewhere, this feature not yet provide. Please help me check issue. Thank you

Currently Redash doesn’t support empty parameters, but it is possible to use a workaround not to have to fill all conditions by using this trick. In other words, you can use values that will “bypass” your conditions. One example is to use the number “-1” to bypass number values.

Thank you for your comment. I try to with example and it’s work with me.