Oracle

When the centos system is switched from the root user to Oracle, the following message is always displayed:-Bash-: [: unary operator expectedIf the switchover succeeds, the above message is displayed. Later, the reason is found. When installing the

The following statements are used to query all your tables in Oracle. If you are interested in Oracle queries, take a look. Select * From all_tab_comments -- query tables and views of all users Select * From user_tab_comments -- query the user's

Oracle uninstall 1. Stop all Oracle services2. run Oracle uninstallProgram3. Modify the Registry① Heky_local_machine \ Software \ oracle② HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services③ Heky_local_machine \ System \ currentcontorlset \

Haha! I cannot remember the error description, which is a problem I encountered before. It is estimated that it will not take much time for me to solve such a problem in the future, but I still want to write it out. Maybe it will help some people

Recently developed C ++/OracleProgramI have not performed any project related to c ++ operations on Oracle. I checked the materials and found the OCI, which is really good. Oracle call interface (OCI) is the most comprehensive and

  After you modify the computer name or the configuration of Oracle when using the Oracle 10g Database, the Oracle Enterprise Manager fails, causing the Database Control Service to fail to start normally, this will cause a lot of trouble. The

Install Oracle 9.2.0 in Linux as 2.1 As early as in the Forum, many colleagues praised how Redhat as 2.1 was easy to use and never had a chance to try this trendy environment. Since the Oracle OCM test environment is also RH as 2.1, I want to

  Data Block overview Oracle manages the storage space in the database data file. The unit is data block ). A data block is the smallest (logical) data unit in a database. The minimum physical storage unit of all data at the operating system level

  Requirements: If the field value is not a numeric or numeric string, update the field value'' 1. Function Method (batch release is not allowed ): create or replace function isNumber(p_in varchar2) return boolean as i

Many people who are familiar with Oracle usually encounter various questions when starting to use the Informix Database: Informix is not supported, and Informix does not have this function? In fact, many times Informix is implemented in different

Generally, we use single quotes.However, when character sets are inconsistent, double quotation marks and single quotation marks are quite different.In addition, when using ODBC bridge to import external data, the table name is enclosed by double

How to display 0 in conditional [Group by] Report in count () SQL query Challenge:Let me assume this: we have two tables, one is regions table with all region information (east, west, etc .) and we have another table with sales information. now, we

After two tests, RAC is very fragile.1. Remove the public network cable of Rac1 and stand next to rac2 to see the changes. It is found that the VIP is quickly converted to rac2 and users can still use it.2.1 minutes later, rac2 restarts

Summary of Oracle Installation (Linux) by freet15 [article from:] Oracle Installation (Linux) by lanf, source: Author: Oracle Installation in freet15 Linux: oracle claims that the installation of the Oracle9i database in Linux requires at least MB

Database Name (db_name), Instance name (instance_name), and operating system environment variable (oracle_sid) 　In oracle7 and 8 databases, only the Database Name (db_name) and database instance name (instance_name) are available ). A new parameter

Command details: E:/> exp help = y by entering the EXP command and user name/password, you can Command after user/password: instance: exp scott/TIGER or, you can also control the "Export" running mode by entering the EXP command with various

Source code: 1. Create an object typeCREATE OR REPLACE Type ty_usernum as object ( Seq_call_usernum number, Calltype number, Areacode varchar2 (10 ), Usernum varchar2 (20) ) / 2. Create a collection typeCreate or replace type ty_tbl_usernum is

---- There are many users who use ORACLE as a database management platform in large and medium-sized database management systems at home and abroad. ORACLE is beyond review in terms of both database management capabilities and security. However, it

In Oracle databases, a series of initialization parameters are used for database constraints and resource restrictions. These parameters are usually stored in a parameter file and read and load when the database instance starts. Initialization

Manufacturing deadlock Create Environment Create table t1_deadlock (a int );Create table t2_deadlock (a int ); Insert into t1_deadlock values (1 );Insert into t2_deadlock values (2 ); -- Step 1Update t1_deadlock set a = 1000 where a = 1;   -- Step