PuTTY + Xming for Oracle image Installation

PuTTY + Xming for Oracle image Installation When we use PuTTY software to connect to a Linux server, ssh or telnet is used by default. Since PuTTY does not have the X window Function, the Oracle graphical installation interface cannot be

An error is reported during data migration between Hive and MySQL databases using Sqoop.

An error is reported during data migration between Hive and MySQL databases using Sqoop. Run./sqoop create-hive-table -- connect jdbc: mysql: // 192.168.1.10: 3306/ekp_11 -- table job_log -- username root -- password 123456 -- hive-table

ORA-12154: TNS: unable to resolve the specified connection identifier resolved

ORA-12154: TNS: unable to resolve the specified connection identifier resolved I believe that people who have used Oracle databases must have encountered the "ORA-12154: TNS: unable to resolve the specified connection identifier" error, I would like

Reset the MySQL root Password in CentOS

Reset the MySQL root Password in CentOS There are many ways to reset the MySQL password in CentOS. The official website also provides convenient and quick operations. For details, refer to resetting permissions. To reset the password, follow these

CentOS 6.5 offline compilation and installation of MySQL 5.6.22

CentOS 6.5 offline compilation and installation of MySQL 5.6.22 Offline compilation and installation of MySQL 5.6.22 on CentOS 6.5. 1. Download the source code package Http://cdn.mysql.com/archives/mysql-5.6/mysql-5.6.22.tar.gz 2.

Use MySQL-Proxy for MySQL database read/write splitting

Use MySQL-Proxy for MySQL database read/write splitting Experimental System: CentOS 6.6 _ x86_64Prerequisites: Firewall and selinux are both disabled.Tutorial Description: In this experiment, there are a total of four hosts, with IP addresses

Oracle 10 Gb read-only table N methods

Oracle 10 Gb read-only table N methods Sometimes to improve data security, we need to set one or more tables to read-only, that is, no DML (Insert, Update, Delete) operations can be performed on them. It is very easy to implement read-only tables in

ORA-00382 and DB_nK_CACHE_SIZE parameter settings

ORA-00382 and DB_nK_CACHE_SIZE parameter settings Recently, I tried to optimize a query that contains the blob field table and considered using a non-standard block cache. However, an error occurred while trying to set the DB_32K_CACHE_SIZE

Eclipse connects to mysql and eclipsemysql

Eclipse connects to mysql and eclipsemysql 1. First install the mysql database. You can search for the specific installation method on a hundred degrees or install mysql as follows: Install Mysql: Download and install xampp; Open the xampp control

Toad for oracle garbled characters in Chinese, toadoracle

Toad for oracle garbled characters in Chinese, toadoracle Toad for oracle garbled characters in Chinese Chinese characters are displayed normally when data is stored in the database, and garbled characters are displayed on the toad for oracle

Does tnsping prove that the Oracle database is available ?, Tnspingoracle

Does tnsping prove that the Oracle database is available ?, TnspingoracleListener is a server-based network service of Oracle. It is mainly used to listen for connection requests from clients to database servers. Oracle officially defines it as: A

Usage of select distinct in mysql, mysqldistinct

Usage of select distinct in mysql, mysqldistinctWhen using mysql, you sometimes need to query records with unique fields. Although mysql provides the keyword distinct to filter out redundant duplicate records, only one record is retained, but it is

How does Navicat Premium open the SQL file. MDF and. LDF, navicat. ldf

How does Navicat Premium open the SQL file. MDF and. LDF, navicat. ldf I believe you will encounter a very headache when installing SQL Server again-after installing SQL server, you will find that the program has not been started. If you have no

Create users and permission settings in Oracle, create permissions in oracle

Create users and permission settings in Oracle, create permissions in oracleOracle user creation and permission settings Permission: Create session Create table Unlimited tablespace Connect Resource Dba Example: # Sqlplus/nolog SQL> conn/as

Mysql Database SQL Optimization-subquery optimization and mysql Database SQL Optimization

Mysql Database SQL Optimization-subquery optimization and mysql Database SQL Optimization1. What are subqueries and table join queries:Subquery: The select statement is used in the select or where clause of the primary SQL statement; select. name,

Analysis of SQL statement execution time and resource consumption using profilessql

Analysis of SQL statement execution time and resource consumption using profilessql Open profiling, which is disabled by default. mysql> set profiling=1; Execute the SQL statement to be analyzed mysql> select count(1) from wechat_employee,Employee;

Oracle9i statspack report analysis direct path read wait event, oracle9istatspack

Oracle9i statspack report analysis direct path read wait event, oracle9istatspackDB Name DB Id Instance Inst Num Release Cluster Host-------------------------------------------------------------------------LIXORA 1409317108 LIXORA 1 9.2.0.1.0 NO

Mongodb addition, deletion, modification, and query

Mongodb addition, deletion, modification, and query * ******************************** 1. insert ******************************** use tblorders; -- Method 1db. tblorders. insert ({orderno: "A2014089901", pname: "tblorders", scity: "beijing"}); db.

Innodb change buffer passive merge, innodbbuffermerge

Innodb change buffer passive merge, innodbbuffermergePassive merge scenario 1: insufficient secondary index page space: ibuf0ibuf. cc: ibuf_insert_low 1. When a cache insert operation is attempted, if the estimated space of the secondary index page

Use of JDBC

Use of JDBC Package com. jack. jdbc; import java. SQL. connection; import java. SQL. driverManager; import java. SQL. preparedStatement; import java. SQL. resultSet; import java. SQL. SQLException; // JDBC case public class JDBCTest {// use JDBC //

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