view all tables

I took notes after reading instructor Xiao Bu's "SQLite Quick Start video tutorial ".   Lecture 1 What is SQLite?Why?How to get it? How to install?How to manage it?How to Use Perl to access SQLite data;How to use C or C ++;SQL features not

SQL> show user; displays the current user (dedicated in the SQL * Plus tool, the better way is to use SQL> Select User from dual; statement to view the current user, the dual table is an oracle table that every SQL * Plus user can use. Here, it is

1. Install MySQL 2. Start the MySQL service and enter the following statement on the terminal: [root @ localhost/] # etc/init. d/mysqld start Starting MYSQL: [OK] 3. log on to [root @ localhost/] # mysql-u Root4. view the database Mysql> show

MySQL administrator Guide MySQL database IntroductionMySQL is a real multi-user, multi-thread SQL database server. SQL (Structured Query Language) is the world's most popular and standardized database language. MySQL is implemented in a

 1. Oracle startup and Shutdown 1. In a single-host environment To start or shut down the Oracle system, you must first switch to the Oracle user, as shown below: Su-oraclea: Start the Oracle System Oracle> svrmgrl Svrmgr> connect internal Svrmgr>

Database downtime migration oracle10g instance and oracle10g migration1. Operation 1.1 of the original database view original configuration 1.1.1 view User Permissions View user system permissions: SQL> select * from user_sys_privs; View User

1. Install CentOS2. Install the library required by ora3. Modify the centos Kernel4. create user groups and directory structures5. Install ora11g2r6. Install the SQL plus paging program and help patch7. self-starting script8. Common commands 1.

-- Method 1: Query dba_tab_columns Select COLUMN_NAME, DATA_TYPE, DATA_LENGTHFrom dba_tab_columnsWhere table_name = upper ('table name ')Order by COLUMN_NAME -- This method requires the DBA permission. -- Method 2: Query user_tab_colsSelect

PLSQL Developer can synchronize table structures and table data of different databases. The Tools Options in the PLSQL Developer menu contain the Compare User Objects and Compare Table Data functions. 1. Tools --> compare user objects This function

MySQL is a simple and easy-to-use basic operation guide. (1) Introduction to mysql basic operations System: Ubuntu 14.04 LTS Installation: Apt-get install mysql // install the database apt-get install mysql-workbench // install the graphical

Oracle DBAs for IT ninja turtles are commonly used to query enumeration of vomiting blood, oracledba -1. query all objects in the systemSelect owner, object_name, object_type, created, last_ddl_time, timestamp, statusFrom dba_objectsWhere owner =

Basic functions in MysqlThe time function select curdate (); returns, excluding the hour, minute, and second select curtime (); returns 14:13:22, excluding the year, month, and day select now (); returns 10: 46: 17 select unix_timestamp (now ();

Introduction to common Oracle data dictionaries A data dictionary is a group of tables and view structures in which Oracle stores information about database objects. It is used to describe data. For example, the Creator information, creation time

MariaDB (MySQL) creation, deletion, selection, and data type Usage Details, mariadbmysql 1. Introduction to MariaDB (skipped in MySQL) The MariaDB database management system is a branch of MySQL and is mainly maintained by the open-source community.

Modify the structure of a tableThere are 3 main syntax for database operations in the DDL definition Creating object: Create object type Object name .... Delete Object Drop object type object name Modify object Alter object type

Common data types char (n) n=1 to2000 byte, saving a fixed-length string VARCHAR2 (n) n=1 to 4000 bytes, variable length can be into numbers, letters, ASCII character set, 12C start maximum support 32767 byte length Long is used to

This section describes how to install MySql in windows and some basic applications. It also describes how to use its Capi. 1. install and use MySQL. 1. Install MySQL and MySQL. 2. Start MySQL, enter C:/MySQL/bin, and click winmysqladmin. When you

Oracle flash back operation: Table FLASHBACK:SQL> show parameter BinSQL> alter system set recyclebin = off;SQL> alter system set recyclebin = on;SQL> select * from cat; // view all tables of the current userSQL> show recyclebinSQL> purge

-Basic connection operations Sqlplus scmgt/scmgt as sysdba connect to the Oracle database // scmgt Sqlplus "scmgt/scmgt @ testdb" connects to another databaseSelect name from V $ database; view the current database nameSelect table_name from all_

I didn't want to write such a simple personArticle, Search for my title on Baidu, which is totally consistent with the title. However, I have been following these articles for a long time, but I cannot. My environment: mysql: mysql-essential-5.1