原生sql

一、查询用Raw

var users []relate_tables.User
db.Raw("select * from users").Find(&users)

二、增改删用 Exec

db.Exec("insert into users (name,age) values(?,?)","hallen222",111)
db.Exec("update users set name = ? where id = ?","hallen111",1)
db.Exec("delete from users where id = ?",1)

三、返回单条

row,_ := db.Raw("select * from users").Row()

四、返回多条

row,_ := db.Raw("select * from users").Rows()