Oracle

1) A column is a string Query. If there is no position, 'no position' is displayed. If yes, the employee's position is displayed. Select ename, nvl (job, 'null') from emp; 2) A column is a number. If nvl (bonus, 0) is used for query, 0 is

-- Add by biao.chen@hand-china.com -- 10:15:56 PROCEDURE done (p_party_id NUMBER, p_contry VARCHAR2, 1_varchar2, p_provice VARCHAR2, p_city VARCHAR2, timed OUT VARCHAR2, x_msg_count out number, x_msg_data OUT VARCHAR2) IS wrongly formed;

Oracle FAQ (7) 61. Oracle cannot be detached under Windows 7 and XP. What should I do?If it cannot be uninstalled, delete it manually. First, make sure that you have logged on to the account with the Administrator permission, go to the Registry

Problem description: A listener is created, and the listener service in the service is opened, but in the listener folder (app \ Administrator \ product \ 11.2.0 \ dbhome_1 \ NETWORK \ ADMIN) does not generate the correct listener file listener. ora

In Oracle VM, we accidentally found that the space was small and we didn't want to reinstall it, so we had to resize it. Fortunately, Oracle VM is relatively easy to use. Just scale up. Steps: 1. Find the uuid C: \ Users \ XCL> cd C: \ Program Files

Software environment: 1. Win7 + ORACLE 11g2. ORACLE installation path: D: \ ORACLEImplementation Method:1. Choose "start"> "Settings"> "Control Panel"> "Administrative Tools"> "services" to stop all Oracle services.2. Start-> Program->

Oracle's system is too huge. For Beginners, it is inevitable that they will not start to feel like they want to learn anything, and the results will not be good. So share their learning experience, we hope that the beginners will have a general

1. Shut down the database as usualThen% SvrmgrlSVRMGRL> connect internalSVRMGRL> startup mount [database_name];SVRMGRL> alter database [database_name] archivelog;SVRMGRL> archive log list;SVRMGRL> alter database open; 2. Set the archive process to

If you want to use a cost-based optimizer after ORACLE9, You need to perform regular (weekly) analyze analysis on the tables and indexes in the database.　The default optimizer_mode = choose optimizer_mode in the database parameter file initorasid.

If you need to COPY a table and create a COPY of the table in another schema under another username), you can use the COPY command of SQL * Plus, or use the simple statement "create table foo as select * from other. foo; ", as long as you have

A sudden power failure occurs during Oracle shutdown, and the database cannot be connected when SQL/plus is used for startup. The specific description is as follows: Connection can not permitted, shut in progress. Enter: c: \> sqlplus/nolog

1. view the table space name and size. Select t. tablespace_name, round (sum (bytes/(1024*1024), 0) ts_sizeFrom dba_tablespaces t, dba_data_files dWhere t. tablespace_name = d. tablespace_nameGroup by t. tablespace_name; 2. view the name and size of

The lifecycle of a database system can be divided into three stages: design, development, and product. The lowest cost and maximum benefit of database performance optimization during the design phase. In the final stage, database performance

The author uses Oracle 7.3 database and HP-UNIX system. Since the Oracle data format is different from the general microcomputer format, Oracle data cannot be directly called. Although Developer 2000, a front-end development tool provided by Oracle,

Introduction Just like any large software package, the default installation of Oracle cannot be used out-of-the-box for most secure systems. Some aspects of the default installation are indeed not safe. This relies heavily on Database administrators

The inetinfo.exeof the Web Service and the apache.exe process of oracleare all using port 80. If you create an ASP. NET application using. NET after installing Oracle, the following error occurs: VS. NET detects that the web server is running ASP.

Since Oracle does not provide tools for Real-Time Message output, Oracle database developers always have to face the challenge of real-time monitoring of their reserve process execution. They must use dbms_output.put_line to call and return the

Oracle uses PASSWORD_REUSE_TIME and PASSWORD_REUSE_MAX in PROFILE to determine whether the password can be reused and the restrictions on Password reuse. However, after testing, I found that the description in the Oracle administrator guide is

In the Oracle ERP Method system, AIMApplication Implementation Method falls under the scope of Implementation management. From the AIM process, we can see that the system timeline is divided into six phases: ◆ Definition stage (Definition)◆

As I told my students in the past when I was a teacher, I had a good way to avoid database performance degradation. It was also very simple to say that application developers should not run any SQL statements in the database, however, this did