package main
import (
"fmt"
"database/sql"
_ "github.com/go-sql-driver/mysql"
)
func main() {
var sqlt string
var table string
db, err := sql.Open("mysql", "root:password@/dbname?charset=utf8")
//查询
sqlt = "SELECT tid from " + table + " where id = (SELECT max(id) FROM " + table + ");"
rows, err = db.Query(sqlt)
for rows.Next() {
err = rows.Scan(&tid)
fmt.Println(tid)
}
//插入
sqlt = "INSERT " + table + " SET tid=?,amount=?,price=?,time=?,type=?,funds=?"
stmt, _ := db.Prepare(sqlt)
stmt.Exec(v.Id, v.Volume, v.Price, v.At, v.Side, v.Funds)
//执行
db.Exec("delete from table where id = '1'")
}
go使用mysql
发布时间:July 30, 2017 // 分类: // No Comments
php使用pdo mysql
发布时间:July 30, 2017 // 分类: // No Comments
$dsn = "mysql:host=localhost;dbname=dbname";
$pdo = new PDO($dsn,"userpassword","password");
//查询
$sql = "SELECT * from tables where id > 1 limit 1";
$row = $pdo->query($sql);
$row = $row->fetchAll(PDO::FETCH_ASSOC);
//插入
$sql = "insert into table(tid,price) values(:tid, :price)";
$stmt = $pdo->prepare($sql);
$stmt->execute(array('35678', '100'));
//删除
$dbh->exec("delete from table where id = '1'");
Go语言解json
发布时间:July 30, 2017 // 分类: // No Comments
package main
import "fmt"
import "encoding/json"
type trade struct {
Amount float64
Price float64
Tid uint64
Date uint64
Trade_side string
}
type res struct {
Status string
Trades []trade
}
func main() {
keysBody := []byte(`{"status":"ok","trades":[{"amount":1783.197,"price":11.64,"tid":1334222,"date":1501319002,"side":"sell","trade_side":"ask"},{"amount":1414.198,"price":11.64,"tid":1334223,"date":1501319002,"side":"sell","trade_side":"ask"}]}`)
//var keys []trade
var keys res
json.Unmarshal(keysBody, &keys)
fmt.Println(keys)
}
未知结构:
package main
import "fmt"
import "encoding/json"
func main() {
keysBody := []byte(`{"1":{"id":7,"last":"0.00000052","lowestAsk":"0.00000052","highestBid":"0.00000051","percentChange":"0.06122448","baseVolume":"82.45931512","quoteVolume":"161135661.58285543","isFrozen":"0","high24hr":"0.00000053","low24hr":"0.00000049"},"2":{"id":8,"last":"0.00005285","lowestAsk":"0.00005335","highestBid":"0.00005285","percentChange":"0.02841019","baseVolume":"8.86982292","quoteVolume":"169072.72178908","isFrozen":"0","high24hr":"0.00005453","low24hr":"0.00005051"}}`)
var n map[string]interface{}
err := json.Unmarshal(keysBody, &n)
if err != nil {
fmt.Println(err)
}
for k, v := range n {
fmt.Println(k, "------", v)
for k2, v2 := range v.(map[string]interface{}) {
fmt.Println(k2, "------", v2)
}
}
}
Centos7安装MariaDB
发布时间:July 30, 2017 // 分类: // No Comments
yum install mariadb-server
systemctl enable mariadb
systemctl start mariadb
MariaDB设置root密码和安全设置:
mysql_secure_installation
crontab使用及不执行解决
发布时间:April 18, 2017 // 分类: // No Comments
crontab 的基本格式是:
<分钟> <小时> <日> <月份> <星期> <命令>
分钟 从 0 到 59.
小时 从 0 到 23.
日期 从 1 到 31.
月份 从 1 到 12.
星期 从 0 到 6, 0 代表星期日.
多个时间可以用逗号隔开,例如:"1,3,4,7,8"
范围可以用连字符给出,例如:"1-6",意思等同于"1,2,3,4,5,6"
星号可以作为通配符,例如,在"小时域"里的星号等于是"每一个小时"。
/号每多长时间,例如,"*/3"在小时域中等于"0,3,6,9,12,15,18,21"。
crontab执行程序时环境变量和用户执行时不一致,在编写命令或脚本时要写全路径,或设置PATH。
当不能正常执行时可按以下流程调试:
1.查看是否在任务队列:
crontab -l
2.查看日记是否已执行:
tail /var/log/cron
3.重定义执行结果:
0 3 * * 0 back-sql >> /tmp/crontab.log 2>&1
4.如果是bash脚本,增加调试:
#/bin/bash
set -x
一些示例:
每分钟执行一次
*/1 * * * * cmd
每小时的第3和第15分钟执行
3,15 * * * * cmd
上午8点到11点的第3和第15分钟执行
3,15 8-11 * * * cmd
每隔两天的上午8点到11点的第3和第15分钟执行
3,15 8-11 */2 * * cmd
每晚的23点执行:
00 23 * * * /etc/init.d/smb restart
每周日23点执行
00 23 * * 0 /etc/init.d/smb restart
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最近回复
- opnfense: 谢谢博主!!!解决问题了!!!我之前一直以为内置的odhcp6就是唯一管理ipv6的方式
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- zongboa: 您好,請問一下有immortalwrt設定guest Wi-Fi的GUI教學嗎?感謝您。
- 海运: 恩山有很多。
- swsend: 大佬可以分享一下固件吗,谢谢。
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