Use native SQL in beego framework orm

1. ExecOperation

Note that the Exec()function can only perform add, delete, and modify operations, not query operations

• 1. Insert data

  o := orm.NewOrm()
  res, err := o.Raw(`insert into user values(id,?,?,?)`, "欧阳锋", 50, "蛇岛").Exec()
  fmt.Println(res.RowsAffected())
  fmt.Println(err)
  

• 2. Update data

  o := orm.NewOrm()
  res, err := o.Raw(`update user set age = ? where id = ?`,40, 8).Exec()
  fmt.Println(res.RowsAffected())
  fmt.Println(err)
  

Two, use QueryRowand QueryRowsquery data

• 1. Simple query

  o := orm.NewOrm()
  user := models.User{
        
        }
  o.Raw(`select * from user`).QueryRow(&user)
  fmt.Println(user)
  

• 2. Query multiple data

  o := orm.NewOrm()
  user := []models.User{
        
        }
  o.Raw(`select * from user`).QueryRows(&user)
  fmt.Println(user)
  

• 3. When parameters need to be passed

  o := orm.NewOrm()
  user := []models.User{
        
        }
  o.Raw(`select * from user where age >= ?`, 50).QueryRows(&user)
  fmt.Println(user)
  

• 4. Use to SetArgsadd parameters

  o := orm.NewOrm()
  user := []models.User{
        
        }
  o.Raw(`select * from user where age >= ? and id > ?`).SetArgs(50, 2).QueryRows(&user)
  fmt.Println(user)
  

• 5. valuesUse

  o := orm.NewOrm()
  var params []orm.Params
  num, err := o.Raw(`select * from user`).Values(&params)
  fmt.Println(num, err)
  fmt.Println(params)