Oracle

Similar to other database systems, Oracle uses "|" to concatenate strings, which is the same as the plus sign "+" in MSSQLServer.For example, execute the following SQL statement:Copy codeThe Code is as follows:SELECT 'employee ID is '| FNumber |'

Oracle provides two listener service registration methods: Dynamic and Static. The status of the dynamically registered service in lsnrctl status is ready, and the static service is unknown.In versions earlier than 11g2, the listener is configured

When you export the data of USERNAME user of Data A and then import it to USERNAME in database B, the following problems occur during table data query by USERNAME User:ORA-06550: 1st rows, 7th columns:PLS-00201: The identifier 'System. PROC_AUDIT

Oracle 10g installation in win7, select advanced options, prompt program abnormal termination, an unknown error occursModify Oracle 10G \ database \ stage \ prereq \ db \ refhost. xmlIn the Go to the install directory and find the oraparam. ini file.

Problem description:Some of my friends often encounter the problem that I entered the correct Chinese. Why is there a garbled code in my queries on another computer? In fact, this problem occurs when the database performs Character Set

In PD, double-click a table and view its preview label. Then, the create statement of a table is displayed as follows:Copy codeThe Code is as follows:Create table Company_Info (Company_ID NVARCHAR2 (50) not null,Area_ID NVARCHAR2 (50 ),Mem_ID

If Oracle has two users A and B, if A wants to access the table owned by B, the statement should be:Copy codeThe Code is as follows:SELECT * from B. TABLENAME. I want to ask, can I modify the Oracle settings to change the language in which A

The oracle sequence statement may be used during development. This article describes how to reset the oracle sequence statement. For more information, seeOracle reset sequence Statement 1SQL codeCopy codeThe Code is as follows:DECLAREN NUMBER (10

Copy codeThe Code is as follows:-- Created on 2010/11/04 by WANGNANDeclare-- Local variables hereI integer;TYPE t_table is table of VARCHAR2 (10) index by VARCHAR2 (2 );V_t_table t_table;TYPE t_pg3 is table of asis. PG3_AGENTCD_CONVERSION %

How does one return table variables in Oracle functions?It's too late, so I won't talk about it if I have too much theoretical knowledge. Let's talk about implementation in a simple way !..1. Create a table object type.To return table objects in

1. Stop various applications at the application layer.2. Stop the listening process of oralce:$ Lsnrctl stop3. Back up the control file under an exclusive system user:SQL> alter database backup controlfile to trace;4. Under an exclusive system user,

As a DBA, one of the common scenarios is:Create a tablespace:Copy codeThe Code is as follows:CreatetablespaceThinkDatafile '/u01/app/oracle/oradata/orcl/think. dbf'

1. query the names of products with prices higher than the average price:SELECT item_name FROM ebsp. product_market_price WHERE item_price> (select avg (item_price) FROM ebsp. product_market_price2. oracle9i or a later version allows you to insert

Now, if a permission number is provided and you want to retrieve the user set with the permission, you need to match the given permission number among multiple permission numbers separated by commas. If you use like, one is less efficient, and the

Total combination set:Group by with rollup/cubeGrouping setsSubqueries are executed in the following ways: Standard subqueries and associated subqueriesStandard subquery: Nested subqueryScalar Value QueryCase with thenUse exits to querySelect

1. query Table Name: Copy codeThe Code is as follows:Select table_name, tablespace_name, temporary from user_tables [where table_name = table name]Where: table_name: Table Name (varchar2 (30 ));Tablespace_name: The tablespace that stores the table

Use the dbms_random package of oracle combined with rownum. For example, 499 users are randomly selected:Select * from(Select * from busi. t_ar_userinfo order by dbms_random.value)Where rownum: References for dbms_random, link:

1. Double-click setup.exe. (The Installation Wizard Page is displayed)2. on the Installation Wizard Page, select "Basic installation" and select the main directory. Create a startup database (Global Database Name: orcl, Database Password: yf123

The ORACLE tutorial is as follows: After Oracle 8x is automatically disconnected, connect again. In actual database applications, we often encounter such a problem. After an operation is performed, the user connected to the Oracle database will no

The ORACLE tutorial is: Oracle Data Warehouse's hierarchical Manager Solution Developer Network Oracle.SummaryThis article describes the principles, steps, and restrictions of the layered manager, and combines it with Oracle Data warehouse to