## SQL构建 ### 1. 执行原生SQL ~~~ db.Exec("DROP TABLE users;") db.Exec("UPDATE orders SET shipped_at=? WHERE id IN (?)", time.Now, []int64{11,22,33}) // Scan type Result struct { Name string Age int } var result Result db.Raw("SELECT name, age FROM users WHERE name = ?", 3).Scan(&result) ~~~ ### 2. sql.Row & sql.Rows 获取查询结果为`*sql.Row`或`*sql.Rows` ~~~ row := db.Table("users").Where("name = ?", "jinzhu").Select("name, age").Row() // (*sql.Row) row.Scan(&name, &age) rows, err := db.Model(&User{}).Where("name = ?", "jinzhu").Select("name, age, email").Rows() // (*sql.Rows, error) defer rows.Close() for rows.Next() { ... rows.Scan(&name, &age, &email) ... } // Raw SQL rows, err := db.Raw("select name, age, email from users where name = ?", "jinzhu").Rows() // (*sql.Rows, error) defer rows.Close() for rows.Next() { ... rows.Scan(&name, &age, &email) ... } ~~~ ### 3. 迭代中使用sql.Rows的Scan ~~~ rows, err := db.Model(&User{}).Where("name = ?", "jinzhu").Select("name, age, email").Rows() // (*sql.Rows, error) defer rows.Close() for rows.Next() { var user User db.ScanRows(rows, &user) // do something } ~~~