Configure Oracle Gateway 12 to connect to SQL Server 2014

Configure Oracle Gateway 12 to connect to SQL Server 2014 In recent work, we need to connect to SQL Server 2014 based on Oracle. We can configure Gateway to implement this function. This Gateway is actually implemented through dblink. That is, the

Simple Test of Oracle 11g flash back Archiving

Simple Test of Oracle 11g flash back Archiving The new features in Oracle 11g flash back archive provide a possibility for custom query of historical data. After learning this feature, I found that it is clear and easy to use. If used properly, it

Introduction to Oracle High Water Mark (HWM)

Introduction to Oracle High Water Mark (HWM) 1. What is high water level? High water level is the boundary between Oracle and unused space. It can also be understood as the boundary between data files and between non-data files, however, the data

CentOS 6.5 installation of Redis and startup script

CentOS 6.5 installation of Redis and startup script I. Download and install Redis in CentOS 6.5 1. Download the source code, decompress it, and compile the source code. # Wget http://download.redis.io/releases/redis-2.8.3.tar.gz# Tar xzf redis-2.8.3.

Set the MySQL character set to utf8 in Ubuntu

Set the MySQL character set to utf8 in Ubuntu Set the MySQL character set to utf8 in Ubuntu 1. mysql configuration file address/Etc/mysql/my. cnf 2. Add the following code below [mysqld][Mysqld]Init_connect = 'set collation_connection = utf8_unicode_

Compile and install MySQL5.7.9 from Linux source code

Compile and install MySQL5.7.9 from Linux source code I. Environment preparation: I have tried the following environments:1. Minimize the default installation of CentOS6.7 minimal images;2. RedHat6.5 install the basic DVD server;3. Other Linux

12 tips for easy survival in Apache Hive

12 tips for easy survival in Apache Hive Learn to live with Apache Hive in 12 easy steps Hive allows you to use SQL on Hadoop, but optimizing SQL on a distributed system is different. Here are 12 tips that allow you to easily master Hive. Hive is

How to automatically start PDB Pluggable Database in Oracle 12c

How to automatically start PDB Pluggable Database in Oracle 12c PDB Pluggable Database is an important new feature of 12c, but for PDB in CDB, all PDB is not brought when CDB is started by default, in this way, we need to manually alter pluggable

MySQL character collation (garbled) Problem Solving

MySQL character collation (garbled) Problem Solving 1. Create a MySQL database 1 CREATE DATABASE `test`2 CHARACTER SET 'utf8'3 COLLATE 'utf8_general_ci'; Create a table 1 CREATE TABLE tp_wechatlocation 2 ( 3 ID INT NOT NULL AUTO_INCREMENT, 4

MongoDB full-text index usage

MongoDB full-text index usage How to create a full-text index for MongoDB:Db. ensureIndex ({key: "text "})Db. ensureIndex ({key1: "text", key2: "text "})Db. ensureIndex ({"$ **": "text", key2: "text "}) Usage of mongodb full-text index query:Db.

Using Jedis in Java to operate Redis

Using Jedis in Java to operate Redis Using Java Redis operations need jedis-2.1.0.jar, if you need to use Redis connection pool, but also need commons-pool-1.5.4.jar, the two files to the house of HELP Resources station download: --------------------

MongoDB replica set: installation and deployment

MongoDB replica set: installation and deployment PreparationsSoftware Environment OS: Oracle Linux 6.5 MongoDB: mongodb3.2.3   Deployment Architecture Three servers are simulated. 10.1.5.123: 28001 master node From node 10.1.5.123: 28002 10.1.5.123:

Migrate uard to a single machine in RAC Environment

Migrate uard to a single machine in RAC Environment Environment Description: Oracle Version: 11.2.0.3.0Primary end:For dual-node RAC, scan uses DNS resolution to run two instances (JSTDB & PAYDB)Standby end:Standalone Federation uard 1. Set the

MySQL slow query log analysis tool mysqldumpslow

MySQL slow query log analysis tool mysqldumpslow Mysqldumpslow is a log analysis tool that comes with mysql. As the name suggests, mysqldumpslow is used to query SQL statements that are slow in query. This analyzes the causes of slow SQL query

MySQL slow query log

MySQL slow query log MySQL supports slow query logs. You can configure query records that have exceeded the specified time for SQL query to log. This is a very effective tool in optimizing SQL queries and can help us quickly locate the problematic

How to change the asm sys User Password

How to change the asm sys User Password You must use the orapwd command to recreate the password file to modify the password of the sys user, instead of using the alert user command: 1. Set Oracle_HOME and ORACLE_SID of the ASM instance 2.

Use MySQL Databases in Python

Use MySQL Databases in Python 1. Install mysqlSudo apt-get install mysql-serverSudo apt-get install mysql-client 2. Install the MySQL-python driverSudo apt-get install mysql-python 3. test whether the installation is successful.Run import MySQLdb In

Redis installation Configuration

Redis installation Configuration This section describes how to install and configure redis and start redis as a service.1. download the latest version of the redis-3.0.7 to the unzip-zxvf redis-3.0.7.tar.gz above the redis-3.0.7 is the directory of

MySQL improves Insert Performance

MySQL improves Insert Performance The time required to insert a record is composed of the following factors, and the number indicates the approximate proportion:• Connection: (3)• Send a query to the server: (2)• Analysis query: (2)• Insert record: (

Set Oracle Internet access in CentOS

Set Oracle Internet access in CentOS Environment: CentOS 7 + Oracle 11g r2 Public Network: fixed IP Address Symptoms: port 1521 is normal, netmanager configuration test is normal, plsql connection prompts ORA-12514: TNS: listener does not

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