一、代码如下package www.tanniu.jdbc;import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;public class Jdbc {public static void main(String[] args) {// TODO Auto-generated method stubjava.sql.PreparedStatement ps= null;java.sql.Connection cn= null;ResultSet rs= null;try {//Class.forName("com....
select*
from(selectevent_date,‘2014-12-06‘as active_date,channel_id,new_user_count as new_user_count,1d_retain/new_user_count as 1d_retain_ratefromweb_channel_retainwhereapp_id=-1andevent_date=‘2014-12-05‘andnew_user_count>= 500andchannel_id in (select distinct channel_id from formated_channel_category where type_id=507 ))as f
order by 1d_retain_rate desc
limit 0,50;The above sql runs less tha...
Demo1Connection connection=null;Statement stmt=null;int result=-1;try {Class.forName("com.mysql.jdbc.Driver");} catch (ClassNotFoundException e) {e.printStackTrace();}try {//创建连接String url="jdbc:mysql://localhost:3306/jdbcdb";connection= DriverManager.getConnection(url, "root", "mysql");} catch (SQLException e) {e.printStackTrace();}try {//创建StatementString sql="CREATE TABLE s_user(id INT PR...
1、通过mysql -uroot -p,输入密码登录后,必须马上修改密码,否则会报错2、将密码修改为123456,依然报错 这和mysql 5.7的密码策略(validate_password_policy)有关,validate_password_policy可以取如下值:默认为1即MEDIUM,包含长度、数字、英文大小写、特殊字符校验。长度由validate_password_length配置,默认为8.3、在/etc/my.cnf配置文件中增加4、修改密码为12345678,成功 5、查看当前密码策略 1 mysql> show VARIABLES ...
一、代码如下private void deleteMysql() {// TODO Auto-generated method stubjava.sql.Statement sm= null;java.sql.Connection cn = null;ResultSet rs = null;try {//加载驱动程序Class.forName("com.mysql.jdbc.Driver").newInstance();//得到连接cn = DriverManager.getConnection("jdbc:mysql://localhost:3306/learn?user=root&password=&useUnicode=true&characterEncoding=UTF8");sm= cn.createStatement();int i= sm.ex...
尝试从Django管理屏幕中插入值时遇到以下错误-Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT. Statement is unsafe because it accesses a non-transactional table after accessing a transactional table within the same transaction.
Request Method: POST
Request URL: *<My URL>*
Django Version: 1.3.1
Exception Type: Warning
Exception Value:
Unsafe sta...
mysql初始化密码常见报错问题
1,mysql5.6是密码为空直接进入数据库的,但是mysql5.7就需要初始密码
cat /var/log/mysqld.log | grep password2,然后执行 mysql -uroot -p ,输入上面的到的密码进入,用该密码登录后,必须马上修改新的密码,不然会报如下错误:
mysql> use mysql;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.3,如果你想要设置一个简单的测试...
数据库:
create table t1(id int primary key not null auto_increment,name varchar(32),password varchar(32));insert into t1(name,password) values(admin,123);
insert into t1(name,password) values(zhangsan,123);
insert into t1(name,password) values(lisi,123);Java代码:
mysqlDao.java:package com.dao;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.S...
两种模式的对比:
Statement 优点
历史悠久,技术成熟;
产生的 binlog 文件较小;
binlog 中包含了所有数据库修改信息,可以据此来审核数据库的安全等情况;
binlog 可以用于实时的还原,而不仅仅用于复制;
主从版本可以不一样,从服务器版本可以比主服务器版本高;Statement 缺点:
不是所有的 UPDATE 语句都能被复制,尤其是包含不确定操作的时候;
调用具有不确定因素的 UDF 时复制也可能出现问题;
运用以下函数的语句也不能...
安装完mysql 之后,登陆以后,不管运行任何命令,总是提示这个
step 1: SET PASSWORD = PASSWORD(‘your new password‘);
step 2: ALTER USER ‘root‘@‘localhost‘ PASSWORD EXPIRE NEVER;
step 3: flush privileges;mac mysql error You must reset your password using ALTER USER statement before executing this statement.标签:sql 命令 运行 mysql alt tin lte exe local 本文系统来源:http://www....
mysql报错Multi-statement transaction required more than ‘max_binlog_cache_size‘ bytes of storage
在执行create table xx as select xx的时候
或者在执行
tpcc-mysql的tpcc_load 的时候
都会遇到这个错误
1534, HY000, Writing one row to the row-based binary log failedRetrying ...
1197, HY000, Multi-statement transaction required more than ‘max_binlog_cache_size‘ bytes of storage; increase this my...
报错:
CDbCommand failed to execute the SQL statement: SQLSTATE[HY000]: General error: 1300 Invalid utf8 character string: ‘\xBF\xA5‘
解决方法:
$currentPrice = $currentPrice * 1; => $currentPrice 原本是字符串的 数字,导致插入数据库失败。=》所以只要改成 数字 即可。=》字符串的 数字 ,乘以 1 就会变成 数字类型。 但是有报告了一个Php的错误:
Internal Server Error
Division by zero
An internal error...
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> use mysql;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
解决方式如下:
MySQL版本5.7.6版本以前用户可以使用如下命令:
mysql> SET PASSWORD = PASSWORD(‘xxxxxxxxx‘);
MySQL版本5.7.6版本开始的用户可以使用如下命令:
mysql> ...
1、重新修改密码,语句如下:mysql> alter user ‘root‘@‘localhost‘ identified by ‘123‘;
Query OK, 0 rows affected (0.00 sec)
2、如果修改过程出现错误(如下),转后面操作:mysql> alter user ‘root‘@‘localhost‘ identified by ‘123‘;
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
2.1、这个其实与validate_password_policy的值有关。validate_password_policy有以下...
, updates to non-transactional tables can only be done in either autocommitted statements or single-statement transactions, and never in the same statement as updates to transactional tables.解决:
查看开发脚本,一个脚本的单个事务中存在以下内容:
insert插入到innodb表,update 更新的是mysaim表 。
联系开发sql拆分两个脚本 分开提交,问题解决。mysql error:@@GLOBAL.ENFORCE_GTID_CONSISTENCY = 1,updates ...