Oracle

Set SQL plus AutoTrace Initial Setup1. Step 1: This is what I like to do to get AUTOTRACE working: • cd [ORACLE_HOME]/rdbms/admin www.2cto.com • log into SQL * Plus as SYSTEM • run @ utlxplan • run CREATE PUBLIC SYNONYM PLAN_TABLE FOR PLAN_TABLE; •

During the course of this semester, the teacher asked us to install the Oracle9i database and practice the installation of the two classes. So it was easy to install, but our data center already has oracle, so the teacher asked us to uninstall it

Overall structure of the oracle databaseDatabase Structure In fact, I introduced the database structure in the previous article about tablespace, but the figure is just a simple hierarchy. This picture looks quite complicated, just focus on several

Common processing methods for NULL values in Oracle sorting 1. Oracle determines by default that null is the maximum value when processing Order by. Therefore, if it is ASC, it is placed at the end, DESC ranks first in descending order. 2. The nvl

Step 1. obtain the current trace file generation path SQL> select tracefile from v $ process where addr in (select paddr from v $ session where sid in (select sid from v $ mystat )); TRACEFILE www.2cto.com without f: \ oracle \ administrator \ diag \

Oracle simple learning Summary (4) -- Advanced query links: oracle simple learning Summary (1) -- sqlhttp: // www.bkjia.com/database/201210/159545.html#oraclesimple learning Summary (2) -- Query Summary (3) -- function http://www.bkjia.com/database/2

Oracle executes a scheduled task every day to create a test table SQL> create table a (a date); www.2cto.com has been created. Create a custom process SQL> create or replace procedure test as 2 begin 3 insert into a values (sysdate); 4 end; 5/the

During the 11th period, the execution of a program in the Process of service response affected by a monitoring system process was particularly slow. It is suspected that the oracle database has a problem and needs to be processed as soon as possible,

Oracle row-specific function listparts () This is an Oracle row-to-column function: listparts () www.2cto.com first look at the sample code: SQL code with temp as (select 'China' nation, 'guangzhou' city from dual union all select 'China' nation,

Step 1: Try to delete a process in sqlplus by running the SQL command. If the process can be deleted successfully, everything is fine! However, if you want to delete a session with a deadlock through a command line or using an oracle management tool,

1. Find the oracle Installation Package and unzip it to the database directory./runInstaller www.2cto.com Do not fill in the oracle support account, and then select "do not receive" in the pop-up window, Continue www.2cto.comSelect to only install

When creating a view in ORACLE, the system prompts insufficient user permissions. Solution: After using scott to log on to Oracle, the system creates a view and prompts "insufficient Permissions". How can this problem be solved? A: This is because

The NTILE function of the oracle analysis function divides the ordered result set in a data partition, groups it into buckets, and assigns a unique group number to each group. This function is useful in statistical analysis. For example, if you want

ORACLE temporary table-on commit preserve rows temporary table: Like a common table, it has a structure, but its data management is different. The temporary table stores the intermediate result set of transactions or sessions, the data saved in the

Oracle table join methods include nested loop join, hash join, sort-merge join, and flute product join. Each join method has certain conditions that are most suitable for use. For each pair of tables to be joined, the optimizer must also determine

There are only two basic ways to access oracle Data: Full scan or index scan. The default index type is B-tree index. The index is created on one or more columns or column expressions in the table, and the column value and row number (ROWID) are

You can use user_table_column to check whether the data of a specified field in the Oracle query table contains a specific character. www.2cto.com the main fields in this view are described as follows: TABLE_NAME table, view, or Clusters name COLUMN_

User test lacks create session privilege logon denied solution: create a user test in the oracle database. If the permissions assigned to test are insufficient, the user test lacks create session privilege logon denied will be prompted when you log

Oracle sets the IP address for database access. oracle Server 192.168.1.9 Linux www.2cto.com oracle client 192.168.1.6 Windows192.168.1.6 tnsping 192.168.1.9Bat code Microsoft Windows [version 5.2.3790] (C) Copyright: 1985-2003 Microsoft Corp. c: \

Orace error: ORA-01438: a problem with a value greater than the allowable precision specified in this column when operating the Oracle database reported the following error: Java code www.2cto.com ORA-01438: if the value is greater than the value