## session作原生查询
直接返回结果集
```go
// 原生sql
res,err := DB().Query("select * from users where uid>? limit 2", 1)
fmt.Println(res)
affected_rows,err := DB().Execute("delete from users where uid=?", 1)
fmt.Println(affected_rows, err)
```
也可以绑定查询结果到给定对象
```go
session := engin.NewSession()
var u = make(map[string]interface{})
session := engin.NewSession()
// 这里Bind()是为了存放结果的, 如果你使用的是NewOrm()初始化,则可以直接使用 NewOrm().Table().Query()
_,err := session.Bind(&u).Query("select * from users where uid=? limit 2", 1)
```
## 更改操作
```go
session := engin.NewSession()
session.Execute("insert into users(name,age) values(?,?)(?,?)", "gorose",18,"fizzday",19)
session.Execute("update users set name=? where uid=?","gorose",1)
session.Execute("delete from users where uid=?", 1)
// 事务, 用法跟orm的事务类似
session.Transaction()
session.LastSql()
```
