module main import pg const dash = '----------------------------------------------------------------' struct Customer { id int name string nr_orders int country string } fn main() { db := pg.connect(pg.Config{ host: 'localhost' //'127.0.0.1' user: 'postgres' dbname: 'customerdb' }) or { println('failed to connect') println(err) return } nr_customers := db.select count from Customer println('Total customers: $nr_customers') // V syntax can be used to build queries println(dash) bg_country := 'Bulgaria' bg_customers := db.select from Customer where country == bg_country && id != 2 for customer in bg_customers { println('$customer.country | $customer.id - $customer.name') } println(dash) ru_customers := db.select from Customer where country == 'Russia' for customer in ru_customers { println('$customer.country | $customer.id - $customer.name') } // by adding `limit 1` we tell V that there will be only one object println(dash) existing := db.select from Customer where id == 1 limit 1 or { panic(err) } println('Existing customer name: $existing.name') println('Existing customer full information:') println(existing) println(dash) q := Customer{} // It's easy to handle queries that don't return any data if anon := db.select from Customer where id == 12345 && name == q.name && nr_orders > q.nr_orders limit 1 { println('Non existing customer name: $anon.name') } // Insert a new customer nc := Customer{ name: 'John Doe' nr_orders: 10 } db.insert(nc) }