Create and set a MySQL user through the command line in Linux

Create and set a MySQL user through the command line in Linux Q: I want to create a new user account on the MySQL server and grant it appropriate permissions and resource restrictions. How can I create and set a MySQL user through command line? To

Relationship between constraints and column attributes NULLABLE in Oracle 10 GB

Relationship between constraints and column attributes NULLABLE in Oracle 10 GB Conclusion: The columname type not null and check (columnname is not null) results are different. Therefore: 1. You do not need to manually match the NULLABLE attribute.

Hibernate configuration file

Hibernate configuration file Persistent objects can be in the following three States: Temporary State (Transient): the object is in the temporary State before it is saved to the database. In this case, the database does not have information about

MySQL startup error solution case

MySQL startup error solution case After installing LAMP on a newly installed CentOS server, restart the system and find that MySQL cannot be started and the following error is reported: /Etc/init. d/mysqld startStarting MySQL... ERROR! The server

Why MySQL cannot log on locally after a user is created

Why MySQL cannot log on locally after a user is created After installing MySQL, we usually add common users with corresponding permissions to access the database. When you log on to the database locally, you can log on from other mysql

MongoDB Study Notes (2)-basic connection example between Node. js and MongoDB

MongoDB Study Notes (2)-basic connection example between Node. js and MongoDBPrerequisites Node. js and MongoDB have been installed. The node. js used in this article is v0.12.0 and MongoDB is 3.0.0. MongoDB Study Notes (1)-install MongoDB on

Creating large file tablespaces in Oracle

Creating large file tablespaces in Oracle Large file tablespace is a new tablespace type introduced in Oracle 10 GB and later versions. It is mainly used to solve the problem of insufficient storage of large files. Unlike Common tablespaces, large

Oracle Rename and delete tablespaces

Oracle Rename and delete tablespaces You can modify the name of a table space as needed. Modifying the table space name does not affect the data in the table space. However, the system tablespace and sysaux names cannot be modified.The syntax for

Oracle Database 11gR2 OEM troubleshooting case

Oracle Database 11gR2 OEM troubleshooting case If the customer's OEM fails, the logon page is displayed as follows: Checking the database status and services is normal.The best way to solve the problem is, of course, to view the background log and

Use HugePages to optimize memory performance

Use HugePages to optimize memory performance Copyright:During reprinting, please use hyperlinks to indicate the original source and author information of the article and this statementHttp://blog.csdn.net/wenshuangzhu/article/details/440955651.

Create a temporary tablespace group in Oracle

Create a temporary tablespace group in Oracle After Oracle 11g, you can create a temporary tablespace group. A temporary tablespace group can contain one or more temporary tablespaces.A temporary tablespace group must consist of at least one

Set the default tablespace in Oracle

Set the default tablespace in Oracle In Oracle, the user's default permanent tablespace is system, and the default temporary tablespace is temp. If all users use the default temporary tablespace, the system and temp tablespaces will undoubtedly be

Oracle query Sequence

Oracle query Sequence Oracle queries the sequence of a user, where user_name is the login name of your current database SQL> select SEQUENCE_OWNER, SEQUENCE_NAME from dba_sequences where sequence_owner = 'user _ name '; SEQUENCE_OWNER

Oracle clusters and cluster tables

Oracle clusters and cluster tables A cluster consists of multiple tables that share the same data block. It stores the related rows of these tables in the same data block, which can reduce the disk read volume required to query data. After creating

How to diagnose the error time returned by sysdate in rac, racsysdate

How to diagnose the error time returned by sysdate in rac, racsysdateRecently, some rac environments have been used to access sysdate and return the error time. This problem often occurs when the database link is created through Listener, and, in

ORA-01733: virtual column not allowed here, ora-01733allowed

ORA-01733: virtual column not allowed here, ora-01733allowedBase table: hr. tt scott. ttView 1: Based on hr. tt union all scott. tt --- scott. tttView 2: Create system. tt Based on View 1-scott. tttProblem reproduction:SQL> create table hr. tt (a

How to import SQL files in Centos, centos import SQL files

How to import SQL files in Centos, centos import SQL files For File Import, In Centos, you must first create a database with the same name as the file. For example: mysql> create database Student; Then enter the command: mysql> use Student; If

OBIEE SampleAppv406 Automatic startup configuration, obieesampleappv406

OBIEE SampleAppv406 Automatic startup configuration, obieesampleappv406 SampleApp introduction:   SampleApp is an all-in-one service that demonstrates almost any top-level features that can be imagined in OBIEE. It is a VirtualBox virtual machine

SQL coding specifications and SQL coding specifications

SQL coding specifications and SQL coding specifications 1. aliases must be created for tables to facilitate the use of columns in the questionnaire. For example, select owner, object_id, name from a, B where a. id = B. id; If you do not use an

Timesten Backup Recovery and timesten backup

Timesten Backup Recovery and timesten backup TtIsql "DSN = ttwind; UID = cacheuser; PWD = cacheuser; OraclePWD = cacheuser ;" -- 1. view the current version Command> versionTimesTen Release 11.2.2.7.0 Command> cachegroups; Cache Group CACHEUSER.

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