我试图把我的数据库上传到pythonanywhere,我正在使用控制台进行上传,但是我不能尝试很多事情,但是我总是会遇到语法错误。
我的命令如下:
mysqldump -u mediexcel2 -p -h mysql.server mediexcel2$basedatosmediexcelprt < Dump.sql;
但我知道这个错误:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for
我在本地主机( ubuntu和windows)中使用Mysql。我想要设置一个全局变量,我已经尝试了所有的方法,但即使我从mysql得到一个"ok“消息,当我执行"select @var”时,它总是说"NULL“。我试过了:
set global var=17;
set @global.var=17;
set @@var=17;
有谁可以帮我?
提前谢谢。
附言:我有超级特权。
我在mytable1的触发器代码中看到:
if (@DISABLE_TRIGGER is null or @DISABLE_TRIGGER=0) then
所以我想这可以这样做:
set @DISABLE_TRIGGER=1;
update mytable1;
delete from mytable1;
..............
.............
insert into mytable1;
.....................
这个变量@DISABLE_TRIGGER =1有多长时间?只有一次查询?用于会话?一直到MySQL服务器关闭?谢谢。
我有个问题,希望有人能帮我。
为了给您提供一些上下文,想象一下这样的循环:
while True:
conn = mysql.connector.connect(**args) #args without specifying poolname
conn.cursor().execute(something)
conn.commit()
conn.cursor.close()
#at this point what is better:
conn.close()
#or
conn.disconnect()
#or
conn.shutdown()
在我的例子中,我使用的
mysql> show global status like 'table_locks%';
+-----------------------+--------+
| Variable_name | Value |
+-----------------------+--------+
| Table_locks_immediate | 433856 |
| Table_locks_waited | 22 |
+-----------------------+--------+
2 rows in set (0.00 sec)
mysql&
我在mysql DDBB中定义了我的var,如下所示:
set @myVar = 1;
所以我想用下面的方式从PHP代码中引用这个变量:
$sql="select @myVar";
$link = connectDB();//connects directly to the ddbb and returns connection object.
if(!$result=$link->query($sql)){
throw new Exception(" Mysql error ".$link->errno);
}
if(mysqli_num_r
我刚刚安装了CentOS Linux,然后下载了MySQL tar文件来安装MySQL。我提取了6个封闭的rpm文件,并点击-server rpm文件来安装它。但是,我得到了以下对话框错误:
Failed to install file
Two packages provide the same name.
This is usually due to mixing packages from different software sources.
当我试图从Linux终端运行安装它时,我会得到以下更具体的日志,这似乎表明了与mariadb的冲突:
[root@localhost
mysql -u user -p pass -h remotehost
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 96
Server version: 5.1.36-community-log MySQL Community Server (GPL)
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysq
下面的代码让网页加载了大约10分钟,我不知道为什么!
function chatheartbeat(){
include("config.php");
$useradn = $_SESSION['displayname'];
$query = "select * from chat where (userbdn = '".$useradn."' AND isread = 1) order by id ASC";
$result = mysql_query($query , $link