How To Read Multi-Column Values?

When reading multi-column results, we care about the column names.
A natural fit for that are case classes.
We need to add a derives SqlReadRow, and then we can use it:

import ba.sake.squery.{*, given}

case class Customer(id: Int, name: String) derives SqlReadRow

def customers: List[Customer] = ctx.run {
  sql"SELECT id, name FROM customers".readRows[Customer]()
}

Note that the case class' fields need to match the SELECT statement columns!

There are also variations that return a single result, depending if you want an Option[T] or T:

sql"SELECT ...".readRowOpt[T]() : Option[T] // first result, if present
sql"SELECT ...".readRow[T]() : T            // first result, or exception