go web 第三天 学习笔记 --mysql

CREATE TABLE `userinfo` (
`uid` INT() NOT NULL AUTO_INCREMENT,
`username` VARCHAR() NULL DEFAULT NULL,
`departname` VARCHAR() NULL DEFAULT NULL,
`created` DATE NULL DEFAULT NULL,
PRIMARY KEY (`uid`)
)CREATE TABLE `userdetail` (
`uid` INT() NOT NULL DEFAULT '',
`intro` TEXT NULL,
`profile` TEXT NULL,
PRIMARY KEY (`uid`)
)

package mainimport (
"database/sql"
"fmt"
_ "github.com/Go-Sql-Driver/MySql"
"log"
"time"
)func main() {
db, err := sql.Open("mysql", "root:123456@tcp(localhost:3306)/test?charset=utf8")
checkErr(err)
//插入数据
stmt, err := db.Prepare("insert userinfo set username=?,departname=?,created=?")
checkErr(err)
res, err := stmt.Exec("nilz", "研发部门", time.Now())
checkErr(err)
id, err := res.LastInsertId()
checkErr(err)
fmt.Println("id:", id)
//更新数据
stmt, err = db.Prepare("update userinfo set username=? where uid=?")
checkErr(err)
res, err = stmt.Exec("nilzupdate", id)
checkErr(err)
affect, err := res.RowsAffected()
checkErr(err)
fmt.Println(affect) //查询数据
rows, err := db.Query("select * from userinfo")
checkErr(err)
for rows.Next() {
var uid int
var username string
var department string
var created string
err = rows.Scan(&uid, &username, &department, &created)
checkErr(err)
fmt.Println(uid)
fmt.Println(username)
fmt.Println(department)
fmt.Println(created)
}
//删除数据
stmt, err = db.Prepare("delete from userinfo where uid=?")
checkErr(err)
res, err = stmt.Exec(id)
checkErr(err)
affect, err = res.RowsAffected()
checkErr(err)
fmt.Println(affect)
db.Close()
}
func checkErr(err error) {
if err != nil {
fmt.Println(err)
log.Fatal(err)
}
}