Comparison of several MySQL environment problems

Comparison of several MySQL environment problems Sometimes there are environmental problems. comparison is a good method. If the comparison is proper, you can avoid repeated problems. You can infer some possible situations or problems based on the

ASM Single Instance CRS-4124, CRS-4000 error handling

ASM Single Instance CRS-4124, CRS-4000 error handling Install GI. Due to limited notebook resources, you have installed Oracle11g GI so that you can learn ASM. After the installation is complete, everything works normally.However, the following

ORA-12154 TNS cannot parse the specified identifier

ORA-12154 TNS cannot parse the specified identifier Report on using pl/SQL developer to access a remote Linux database in WinORA-12154 TNS cannot parse the identifier, but SQLPLUS is normal under WinC: \> tnsping lin_hjj TNS Ping Utility for 64-bit

When TOAD is connected to DB2, SQL1460N is reported.

When TOAD is connected to DB2, SQL1460N is reported. Tests should be performed between different versions of DB2 over the past few days. DB2 V9.7.4 64bit has been installed before, DB2 V9.7.6 has been installed after the test is uninstalled, the

Data Types of MySQL Learning

Data Types of MySQL Learning I. Data Types 1. value types: TINYINT, SMALLINT, MEDIUMINT, INT, BIGINT, and DECIMAL2. Time type -- DATE, DATETIME, TIMESTAMP3. string type-CHAR, VARCHAR, TEXT4. Special types-ENUM and SETString case sensitive --

SQL statement for querying Oracle table data by PAGE

SQL statement for querying Oracle table data by PAGE The SQL syntax for querying Oracle data by page is widely used on the Internet. This article is also a typical syntax for the author to search on the Internet. It is not my original one and is

How to enable MySQL database remote connection

How to enable MySQL database remote connection Sometimes it is not possible to remotely connect to the MySQL database. You can refer to the following method to solve the problem. 1. log on to the MySQL database of your machine: mysql-uroot-p

Test the synchronization of Single-host OGG to Oracle 11 gb db in Linux

Test the synchronization of Single-host OGG to Oracle 11 gb db in Linux 1. Install goldengate Software1. test environment:OS: RedHat 6 64bitDB: Oracle 11.2.0.3 64bitView OS and DB versions[Oracle @ redhat6 ~] $ Uname-Linux redhat6 2.6.32-131.0.15.el6

Page processing of Neo4j graph data

Page processing of Neo4j graph data First, we will briefly introduce Neo4j. Neo4j is a high-performance NOSQL graphic database that stores structured data on the network rather than in tables, it is an embedded, disk-based, Java persistence engine

The 11g asm disk cannot be automatically mounted.

The 11g asm disk cannot be automatically mounted. I started ASM today and found that only one SYS_DG DISK is mounted (used to store OCR and VOTING DISK information). The other two DISK groups DATA_DG and DG_FRA do not mount.Environment: OS = RHEL 6

MySQL monitoring tool-Innotop

MySQL monitoring tool-Innotop Innotop is a powerful MySQL monitoring tool. It uses perl to show the running status of MysQL servers and Innodb in text mode. Install innotop : Https://github.com/innotop/innotop Github provides two versions: The

About the field-based fuzzy query method of MongoDB

About the field-based fuzzy query method of MongoDB About the field-based fuzzy query method of mongodb Fuzzy query: tname contains a keyword Test' Cd/opt/soft/mongodb/bin ./Mongo -- host 192.168.0.1 -- port 17017 test Db. test_info.find

In MongoDB, time stamps are converted to common date formats in batches.

In MongoDB, time stamps are converted to common date formats in batches. 1. mongodb traversal script provided on the official website:Official documentation: https://docs.mongodb.org/manual/tutorial/remove-documents/> Var arr = ["AB", "cd", "ef"]>

MongoDB 3.2 WiredTiger storage engine performance test

MongoDB 3.2 WiredTiger storage engine performance test MongoDB 3.2 was recently released. It uses WiredTiger as its default storage engine. Over the past five years, MongoDB has developed rapidly from its birth to its popularity. MongoDB 3.0 began

Detailed installation process of source code in the latest version of MySQL 5.7.10

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ORA-00824: cannot set sga_target due to existing solution

ORA-00824: cannot set sga_target due to existing solution When I got home from work today, I received a call from a colleague, saying that after I used the Oracle9i client to connect to Oracle10g, some parameters were modified, so that Oracle10

Migrate the collection data in MongoDB to the MySQL database

Migrate the collection data in MongoDB to the MySQL database 1. Export data on mongodb and write expmongo. sh. The shell script is as follows: #! /Bin/shDatestr = 'date' + % Y-% m-% d''/Usr/local/mongodb/mongodb-linux-x86_64-2.4.4/bin/export-im_user-

Oracle 11g system-level trigger to track drop misoperations

Oracle 11g system-level trigger to track drop misoperations Preface:The data in a table in the db is always disordered. I guess I 've experienced data synchronization operations such as drop and create, but no one knows where to operate it now,

Redis performance test

Redis performance test Redis performance testing is achieved by executing multiple commands at the same time. Redis performance testing is mainly implemented through redis-benchmark in the src folder (in Linux)Syntax The basic commands for redis

MySQL paging Optimization

MySQL paging Optimization This afternoon, I helped my colleagues rewrite a MySQL SQL statement that involves two tables, one of which is a dictionary table (a field needs to be returned ), the other table is a business table (which contains 150

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