Oracle

In this tutorial, you will learn how to use Oracle SELECT DISTINCT statements to query different data from a table.Introduction to Oracle SELECT DISTINCT statementsUse clauses in a SELECT statement DISTINCT to filter duplicate rows in the result set.

1. Modify the archive Path parameterSqlplus/as SYSDBASql> alter system set log_archive_dest_1= ' Location=+asmarch ' scope=spfile sid= ' * ';2. Close the database and all nodes are closedSrvctl Stop database-d racdb3. Boot a node database to mount

First, modify the syntax of the field: ALTER TABLE tablename modify (field name type [default Value][null/not null],....);There is a table named TB, field segment named Name, data type nchar (20).1. ALTER TABLE TB Modify (name Nvarchar2 (20));2, if

In our daily work, some security-demanding databases need to increase audit operations and which users do what when.1. Open the audit of the databasealter system set audit_sys_operations=TRUE scope=spfile; //审计管理用户alter system set

Objective Due to the company's business needs, we need to create virtual machines in bulk to perform tasks that need to be destroyed after the task is run to conserve resources.The way we create virtual in bulk is through the bash interface

I. PL/SQL tableThe PL/SQL table has only two columns, where the first column is listed as an integer type and the second column is the user custom.Defined:TYPE is TABLE of Types of [Not NULL] INDEX by Binary_integer;The type of can be a data

MyBatis foreach BULK INSERT data: Oracle differs from MySQL: The main difference is the setting of the Separator property within the foreach tag: Separator is set to "," when split, the final stitching code form is: INSERT INTO

Oracle's analytic functions are powerful, and work is often used over the years. This time, the usual use of the analysis function to sort out. for future viewing.We take cases to learn, so it is more easy to understand.1. Build a tableCREATE table

oracle11g Password ExpirationConnect to Oracle, log in as root and enter the following commandSelect * from where profile='DEFAULT' and resource_name=' password_life_time';The results show:The result shows that the password is valid for 180

To see if the database is in non-archive modeClose the databaseShutdown immediateBackup control files and data files (no backup log files, recommended backup)[[email protected] PROD]$ lltotal 2014624-rw-r----- 1 oracle oinstall 9748480 Jan 24 21:49

Scripts are primarily used for Redhat platform installation 11g and 12c software     Dependency check and install     user, group check and install     system kernel, user limit     firewall, SELinux off     Note that only DBAs are created in the

Oracle triggers. When a table is updated or inserted, data is synchronized to a table in another database. oracle Data is synchronized. Two tables are the T_SRC_WEATHER_TSPG fields under User, User B's t_src_weather table, It is required that when

What should I do if an error is reported during submission using svn in eclipse or myeclipse ?, Myeclipsesvn An error is reported when you submit an application using svn in eclipse or myeclipse: Attempted to lock an already-locked dir If you

Oracle sorts specific information for a column [decode], oracle sorts decode In ORACLE queries, if there is no sorting, but you want to route the information of a specific value in a column to the front, use the decode (field, 'field value', number)

Comparison between four methods for batch ORACLE update and four methods for oracle update Software Environment Windows 2000 + ORACLE9i Hardware environment CPU 1.8G + RAM 512 M Now we have two tables: T1 -- large table 10000 T1_FK_ID T2 -- small

Oracle Database exercise example and answer sharing, oracle exercise questions I. Create a table 1. create table empgj (empno number () primary key, ename varchar2 (10), 2.job varchar2 (9), mgr number (), hiredate date, sal number ), comm 3. number

Explain how to use and use table partitions in oracle table shards. This article describes the concepts and operations of Partitioned Tables from the following aspects: 1. Concepts of tablespaces and partition tables 2. Specific functions of table

Linux modifies the Oracle database character set instance and the oracle Character Set 1. Log On As a dba in SQL * PLUS Conn/as sysdba > Shutdown immediate; (stop the database)> startup mount; (restart the database to change the condition)>

Oracle: View All Tables and table columns of the current user, including yellowcong and oracleyellowcong. I have previously written a tool to dynamically generate the oracle entity class function, but this tool can only be used for the Searsar

In Oracle, how does one obtain user table information and other details ?, Oracle acquisition 1. Get the User Name of the current user SELECT USERNAME FROM USER_USERS; 2. Obtain the names of all tables under a user. SELECT TABLE_NAME FROM