我尝试使用cx_Oracle和SQL Alchemy执行从Oracle到MySQL的批量提取/加载。
我在网上找到了这个例子,它对大多数数据类型都工作得很好,但对Blob数据类型却失败了:
我有大约43个表,其中大约12个表具有BLOB数据类型。
import cx_Oracle
import pandas as pd
from sqlalchemy import create_engine
import pymysql
import warnings
warnings.filterwarnings('ignore')
# list out all 43 tables:
如何将mysqlsh外壳更改为mysql-js JavaScript模式?
一开始我在mysql-py,我不能切换到\js,只能切换到\sql。为什么?
$ mysqlsh root@localhost:33060
Cannot set LC_ALL to locale en_US.UTF-8: No such file or directory
Please provide the password for 'root@localhost:33060': ******
MySQL Shell 8.0.23
Copyright (c) 2016, 2021, Oracle a
我有两个sql文件,一个用于oracle,另一个用于mySql数据库。路径如下 db/migration/mysql/V1_1_migration.sql
db/migration/oracle/V1_1_migration.sql 在运行测试时,我得到以下错误 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'flywayInitializer' defined in class path resource [org/s
我在我的Windows计算机上安装了Oracle 11g XE (运行在Windows上),但不幸的是,它无法工作。在安装过程中,GUI安装程序没有出现错误,我得到了“已安装成功”消息,但是当我试图使用SQL命令提示符连接到Oracle时,我得到以下错误:
SQL> connect
Enter user-name: system
Enter password:
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
Process ID: 0
Session ID: 0 Serial number: 0
“开始”快捷
我使用5.7.9版本,如下所示,在上。
~ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.7.9 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered tra
我测试了以下代码以获得MySQL版本:
public void testMySQLVersion() throws Exception
{
System.out.println("\nTesting SQL query for MySQL version\n");
// Load the JDBC driver
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
// Connect to the database
我使用的是Spark SQL 2.1, 我可以在Spark SQL中以临时视图的形式从mysql/oracle中读取数据: val url = "jdbc:mysql://localhost:3306/db1"
val user = "root"
val pass = "root"
val sql =
s"""
CREATE OR REPLACE TEMPORARY VIEW foobar
USING org.apache.spark.sql.jdbc
OPTIONS (url &
嘿,伙计们,我正试着用php连接一个oracle数据库。我尝试了它,就像我使用mysql一样。具体操作方法如下:
$host="localhost";
$user="username";
$pass="password";
$db="database";
$link = mysql_connect($host, $user, $pass) or die ("Keine Verbindung zu der Datenbank moeglich.");
mysql_select_db($db, $link);
$
下面哪个特定的JDBC驱动程序是我的?
nicholas $
nicholas $ basex mysql.xq
Stopped at /home/nicholas/flwor/mysql.xq, 3/9:
[sql:init] Could not find driver: com.mysql.jdbc.Driver
nicholas $
nicholas $ cat mysql.xq
xquery version "3.0";
sql:init("com.mysql.jdbc.Driver"),
let $con := sql:connect(