Hyperledger Composer How to write complex queries in Composer

Question

We can pass simple pass with the command but what if I have complex queries for larger tasks? How can I pass a complex query?

Answer 1

You can do this using the query method. 

Syntax:

query queryname{
    description: "Desciption of query"
    statement:
        //query logic
}

Example: 

query Q17 {
    description: "Select all drivers aged older than PARAM"
    statement:
        SELECT org.example.Driver
            WHERE (_$ageParam < age)
}

You can find more details here: https://hyperledger.github.io/composer/unstable/reference/query-language