Java转Go日记（四十四）：Sql构建

1.1.1. 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})// Scantype Result struct {Name stringAge  int}var result Resultdb.Raw("SELECT name, age FROM users WHERE name = ?", 3).Scan(&result)

1.1.2. 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 SQLrows, 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)...}

1.1.3. 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 Userdb.ScanRows(rows, &user)// do something}