view all tables

1. On the premise that the environment variable is well configured, strike the command #>sqlplus2. Enter username/password Login Oracle #> default we use first, user name: Scott, password: Tiger login3.A. When you log in, you can only tap Sqlplus,

Operation of MySQL DatabaseOne: View all the databases in MySQLSHOW DATABASES;Two: Create a databaseCretae database name;Three: Deleting a databaseDROP database name;Four: View the storage engines supported by the databaseSHOW ENGINES;Four: Connect

One, view all databases in MySQLshow databases;Second, view the database that is currently in useSelect Database ();Third, view all tables in the current databaseShow tables;Iv. Viewing the table structureDescribe employees;Where employees is the

SQL SERVER Data import MYSQLTools: Navicat for MySQL Baidu search an installation can, if you have installed MySQL1, create the target databaseClick Create a good target database website The table item on the point, the Import wizard appears on the

Demo:Syntax for creating a database1. Basic grammarCreate DATABASE tour character Set GBK;Use tour;Non-primary key self-growingCREATE TABLE Emb_t_employee(Emb_c_operatorid int NOT NULL,Emb_c_empcode varchar (255) is not NULL,Emb_c_gender int NOT

--Select 30 of employees in the departmentSELECT * from EMP where deptno=30;--List all clerks ' names, departments, numbers--Using the internal connection, that is, the equivalent link, is also the most commonly used linksSELECT ename,empno,dname

1. View the current user's basic information SELECT * FROM User_users 2. View the role of the current user SELECT * FROM User_role_privs 3. View System permissions and table permissions for the current user

1. Enter the HBase command line>hbase ShellExit command line>quit2. Create a table>create ' users ', ' user_id ', ' address ', ' info '3. View All Tables>list4. View table Structure>describe ' users '5. Delete the table:>disable ' users ' >drop '

Col Column name for (MAT) format: Columns can be formatted (A100 is a varchar-based format that displays 100 characters, which can be A60,A80), for example: col file_name format a100;col column name: Display the format of the forefront Clear Co Lumn:

1Isql-usa-s Service Name--General Login2Isql-usa-s Service Name-jcp936--SA user logs on client using character set cp9363 4C:\USERS\ADMINISTRATOR>ISQL-USA-SRUSKYPC--gracefully shut down the database5 Password:6 　　 1>shutdown7 　　 2>Go8 9

Input command hbase Shell entersTo view all tables that exist:ListTo view the table structure:Describe ' table name 'Query the contents of the table:Scan ' TABLENAME '-----For example have a student table to view it scan ' student 'Add, update data :

 1, creating table: Create ' t1 ', ' F1 ', ' F2 ', ' F3 '                   #-------T1 is the table name, F1,F2 , F3 is the column family name  2, view all tables: list 3, view the structure of the table: describe ' t1 '  4, add a column family:

When developing a project, there is a feature that needs to see what tables are in the database, and what fields are available for each table, viewed online, and now shared with you.Oracle:Query data table (Tables) Name:Select table_name, Tablespace_

The Client service name establishes a connection to a remote or local listener that the client uses to issue a connection request to the server side.When Oracle is installed, the user must specify a global database name, a SID name. Oracle

The database and table description used in the example:1. Select Database Use DAY15; 2. Create a table CREATE TABLE teacher ( ID INT, NAME VARCHAR ) 3. View all Tables Show TABLES; 4. View table structure DESC student; 5, delete the

--querying all users in the current systemSelect * fromall_users--Check all the tables below the current user:Select * fromtabwhereTname not like '%$%'--View all tables under the current user (more info)Select * fromUser_tables--Check all the

Import and export of DMP files:Import and export of the whole library1. Exporting from a remote machineEXPDP Npmdb/[email protected] Schemas=npmdb directory=my_dir dumpfile=npmdb_87.dmpParameter descriptionSchemas: can be seen as the database name,

One, cmd Log on to the Oracle serverSqlplus Scott/[email protected]//192.168. 241.128:1521/ORCSecond, the basic operation1, solve Sqlplus does not support the Chinese setting:Add the environment variables as follows:Set Nls_lang to simplified

It turns out, if not often with the code, the statement deal with, people will be over face not, the brain will feel a face, do not know what to do wrong, this long memory, the statement, not only to strengthen the memory of the SQL statement, but

About MySQL1. What is a database?A database is a warehouse that organizes, stores, and manages data according to its structure, which is generated more than more than 60 years ago, with the development of information technology and markets,