Solve the Problem of MySQL Chinese garbled characters

Solve the Problem of MySQL Chinese garbled characters In the case of MySQL Chinese garbled characters, first use the status command to check the database configuration, as shown below: The information about the database configuration is

PostgreSQL Select Source Code Analysis

PostgreSQL Select Source Code Analysis This time sequence diagram is relatively large, but it roughly describes the general process for PostgreSQL to process simple SQL statements. The client initiates an SQL statement. After receiving the Statement

Oracle 11g creates the second instance on Linux

Oracle 11g creates the second instance on Linux The Linux server host is not enough, and the tester needs a new Oracle environment for testing. Therefore, the tester is prepared to create a second instance on the existing Oracle Linux host. This

In PL/SQL, how does one insert a data entry every several seconds?

In PL/SQL, how does one insert a data entry every several seconds? In compiling Oracle PL/SQL, if you need to pause the execution for a few seconds and continue the execution, you can use dbms_lock.sleep built in Oracle. However, you must install

Details about Reference Partition in Oracle 11g

Details about Reference Partition in Oracle 11g Data Partition is a solution for Big Data Objects proposed by Oracle in the early days. After the evolution of several versions, Partition is still a popular and widely used technical strategy with a

OGG-03510 troubleshooting

OGG-03510 troubleshooting OGG migration, the target end has been upgraded to 12C, so with the 12 version of OGG, the parameter is still using the previous 11g, but when starting the application process prompts OGG-03510 error, as follows: The source

Create split and splitstr functions in Oracle

Create split and splitstr functions in Oracle It is recommended that SQL statements be created in sequence. /*************************************** Name: split* Author: sean zhang.* Date: 2012-09-03.* Function: returns the table type after a string

Use of the Log4jdbc database access logging framework

Use of the Log4jdbc database access logging framework Log4jdbc official website address Http://code.google.com/p/log4jdbc/ Https://github.com/arthurblake/log4jdbc The latest version is 1.2. JDBC3 and JDBC4 are supported. Log4jdbc is a log

PostgreSQL vacuum Principle 1 Functions and Parameters

PostgreSQL vacuum Principle 1 Functions and Parameters From the previous article "PostgreSQL MVCC source code implementation []", we know that PG does not store the old version of undo like Oracle, but directly stores the old version in the relation

Oracle stored procedures and Java calls

Oracle stored procedures and Java calls I found many bugs for the first time, so I paid a lot of attention. It took me three days to get rid of all the bugs. I will list all the points of attention, and there may be drops, please correct and discuss

PostgreSQL xlog file name specification source code parsing

PostgreSQL xlog file name specification source code parsing PostgreSQL xlog, that is, WAL (Write Ahead Log), is located In the pg_xlog directory and is the Log on which PostgreSQL fully or PITR (Point In-Time Recovery) depends. Why is there WAL

New Features of Oracle 11g: User rename

New Features of Oracle 11g: User rename Oracle Data is constantly changing during project development. Therefore, we need to regularly import the development database to the test database. The common practice is "trilogy :" 1. Export data from exp

Source code analysis of page Structure in PostgreSQL

Source code analysis of page Structure in PostgreSQL Source code analysis of page Structure in PostgreSQL In PG, the smallest Management Unit in disk storage and memory is page, which is also commonly referred to as block. Generally, the size of the

Clear the WRH $ _ LATCH_CHILDREN table of the sysaux tablespace

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Rebuild SCOTT users and SCOTT stories

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ORA-600 [kcbz_check_objd_typ] Error Handling

ORA-600 [kcbz_check_objd_typ] Error Handling Basic ElementsChannel feedback, HIS software in the data storage, prompt ORA-600 error, the specific error information is as follows: [Microsoft] [ODBC driver forOracle] [Oracle] ORA-20999: ORA-00600:

MySQL Horizontal Split (Reading Notes) and mysql Reading Notes

MySQL Horizontal Split (Reading Notes) and mysql Reading Notes1. Introduction to horizontal split In general, a simple horizontal split mainly refers to distributing a table with extremely ordinary access to multiple tables according to certain

Mysql installation/registration/download, mysql Registration

Mysql installation/registration/download, mysql Registration 1. copy the file to disk D and Directory 2. Set profile properties "D: \ mysql-5.6.24-winx64/my-default.ini" basedir = "D: \ mysql-5.6.24-winx64/" datadir = "D: \

Implement HTTP storage plugin and drillplugin in Drill

Implement HTTP storage plugin and drillplugin in Drill Apache Drill can be used for real-time big data analysis: Inspired by Google Dremel, Apache's Drill Project is a distributed system that performs Interactive Analysis on large datasets. Drill

PL/SQL and SQLPLUS query results are different-Never forget commit !, Sqlpluscommit

PL/SQL and SQLPLUS query results are different-Never forget commit !, Sqlpluscommit For the same SQL statement, the query results in PLSQL and SQLPLUS are different. Have you ever seen them? Today, we executed a query select * from t_user in the

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