// user has many items
itemStmt := memeduck.Select("user_item", []string{"item_id", "count"}).
    Where(memeduck.Eq(memeduck.Ident("user_id"), "user-id")).
    AsStruct()
// user has one status
statusStmt := memeduck.Select("user_status", []string{"state"}).
    Where(memeduck.Eq(memeduck.Ident("user_id"), "user-id")).
query.Stmt, _ := memeduck.Select("user", []string{"name"}).
    SubQuery(
        memeduck.ArraySubQuery(itemStmt).As("user_item"),
        memeduck.ScalarSubQuery(statusStmt).As("state"),
    ).
    Where(memeduck.Eq(memeduck.Ident("user_id"), "user-id")).
    SQL()
// Output:
// SELECT
// name,
//	ARRAY(SELECT AS STRUCT item_id, count FROM user_item WHERE user_id = "user-id") AS user_item,
//	(SELECT state FROM user_status WHERE user_id = "user-id") AS state
// FROM user WHERE user_id = "user-id"