Created
May 25, 2020 08:15
-
-
Save ggzeng/bb6177d7876d2da270e33703f237bc87 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"database/sql" | |
"encoding/json" | |
"fmt" | |
_ "github.com/go-sql-driver/mysql" | |
) | |
type Book struct { | |
id int | |
category Category | |
tags []int | |
} | |
type Category struct { | |
Id int | |
Name string | |
} | |
func main() { | |
db, _ := sql.Open("mysql", "root:123@/xty") | |
rows, _ := db.Query("select category,tags from book where id=?", 2) | |
columnTypes, _ := rows.ColumnTypes() //根据列分类 存储进一个[]ColumnTypes中 | |
str1 := columnTypes[0].DatabaseTypeName() //第一列在数据库对应的数据类型 | |
name1 := columnTypes[0].Name() //第一列的名称 | |
str2 := columnTypes[1].DatabaseTypeName() //第二列在数据库对应的数据类型 | |
name2 := columnTypes[1].Name() //第二列的名称 | |
fmt.Println(str1, str2) | |
fmt.Println(name1, name2) | |
type1 := columnTypes[0].ScanType() //在go中所对应的类型 | |
type2 := columnTypes[1].ScanType() | |
fmt.Println(type1, type2) | |
var book Book | |
var ( //使用sql.RawBytes来接收数据库中查询出来的json数据 | |
category sql.RawBytes | |
tags sql.RawBytes | |
) | |
for rows.Next() { | |
rows.Scan(&category, &tags) | |
} | |
json.Unmarshal(category, &book.category) | |
json.Unmarshal(tags, &book.tags) | |
fmt.Println(book) | |
c := Category{Id: 9, Name: "sword coming"} | |
t := []int{1, 2, 3, 4, 5, 6, 7} | |
c2j, err := json.Marshal(c) | |
t2j, err := json.Marshal(t) | |
res, err := db.Exec("insert into book(id,category,tags) values(?,?,?)", 4, c2j, t2j) | |
if err != nil { | |
panic(err) | |
} | |
fmt.Println(res.LastInsertId()) | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment