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Asked: 2026-05-13T23:24:00+00:00

Ok here is my problem : Before i start the description, let me to

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Ok here is my problem :

Before i start the description, let me to tell you that I have googled up a lot and I am posting this question for a good optimal solution 🙂

i am building a rest service on WCF to get userProfiles… the user can filter userProfiles by giving something like userProfiles?location=London

now i have the following method

GetUserProfiles(string firstname, string lastname, string age, string location)

the sql query string i built is:
select firstname, lastname, .... from profiles where (firstName like '%{firstname}%') AND (lastName like '%{lastName}%') ….and so on with all variables being replaced by string formatter.

Problem with this is that it filters any row having firstname, lastname, age or location having a null value….

doing something like (firstName like '%{firstName}%' OR firstName IS NULL) would be tedious and the statement would become unmaintanable! (in this example there are only 4 arguments, but in my actual method there are 10)

What would be the best solution for this?….How is this situation usually handled?

Database used : MySql

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1 Answer

  1. Editorial Team

    You can use COALESCE(value,…) 

    coalesce(firstName, '') like '%{firstname}%'
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