Oracle

Official Oracle Installation documentationHttp://download.oracle.com/docs/cd/B28359_01/install.111/b32002/toc.htm  1. Install related packages1.1 install the following 10g Package on redhat 4:Required package versions (or later ):Binutils-2.15.92.0.2

 SQL:> select numtodsinterval (365, 'second') from dual;Result: + 000000000 00:06:05. 000000000; SQL:> select SUBSTR (numtodsinterval (365, 'second'),) from dual;Result: 00: 06: 05; SQL:> select to_char (to_date ('201312', 'ssss'), 'hh24: mi: ss')

1. After logon, My Objects is automatically selected by default. After PLSQL Developer logs on, All objects is selected in Brower. If the user you log on to is dba, expand the tables directory, in normal cases, Wait takes several seconds, and the

The ORA-01940 cannot delete the solution for the currently connected user 1) view the user's connection status select username, sid, serial # from v $ session (2) Find the sid of the user to delete, and serial, and delete ----------------------------

DBA _ view returns information about all objects in the database, regardless of the object owner. Only the database administrator can access this view. For example, a query of DBA_TABLES returns a list of tables related to the database. Sometimes

DBMS_MVIEW.EXPLAIN_MVIEW can analyze three different materialized view codes:1. defined query 2. a create materialized view Statement 3. An existing MATERIALIZED VIEWThe procedure is as follows: www.2cto.com1. Run the table creation statement SQL> @

Database backup and recovery are common and important. Logical backup in ideal state is restored. EXP backup is used to extract data from the database and write data to the operating system file. you can export a complete database. 2. you can also

Four steps for displaying the cursor in PLSQL this example briefly introduces the locking and consistent read problems involved in the four processes of the cursor processing. explicit cursor processing requires four PL/SQL steps: www.2cto.com 1

Oracle 11g modifies the rac scan ip address in 11gR2 and introduces the SCAN (Single Client Access Name) feature. The advantage of this feature is that between the database and the Client, A virtual service layer is added, that is, the scan ip

Oracle SQL Execution flowchart _ SQL Execution Process 1. SQL statement execution steps:1) analyze the syntax and analyze whether the syntax of the statement complies with the specifications, to measure the meaning of each expression in the

Oracle through DBLink access to the remote database LOB field reporting ORA-22992 solution recently in a photo collection function, photo collection is outside the network library, while the Internet after the photo collection, the Intranet will

Why is this Oracle function with parameters not input? -- The truth is that there are two tables in my Oracle Database: emp (employee table) and dept (Department table). The table structure is as follows: the table www.2cto.com Emp is as follows:The

An Introduction to left join, right join and full join in oracle is from oracle ocp9i document: outer join syntax: 1) you use an outer join to also see rows that do not meet the join condition 2) the outer join operator is the plus sign (+) outer

ORACLE with SYS and SYSTEM default password logon prompt ORA-01017: invalid username/password; logond denied solution environment: Oracle 11g R2 + SQLPlus problem: ORACLE with SYS and SYSTEM default password logon prompt ORA-01017:

The oracle listener cannot be started, and the system prompts "error 1067: unexpected termination of the process". Today, a problem occurs: oracle's OracleOraHome90TNSListener service cannot be started now and can be started normally before, now an

Description of the Decode () function in oracle: DECODE (condition, value 1, translation value 1, value 2, translation value 2 ,... value n, translation value n, default value) the meaning of this function is as follows: IF condition = value 1 then

Oracle rman automatic backup script #! /Bin/sh. /opt/oracle /. bash_profilePWD_SYS = "/" BAK_DIR = "/opt/oracle/backup/oatest" BEGIN_SEQ =$ (sqlplus-s $ {PWD_SYS} 'as sysdba' /opt/oracle/backup/oatest/backup_rman.log 2> & 1 & 

Solution to the Oracle client tool "Cannot access NLS data files or invalid environment specified" error: After the Oracle client tool Navicat for Oracle is installed a few days ago, no errors have been found, when I installed it on the computer in

Oracle queries the department with the minimum number of employees [SQL] -- department table create table t_dept (d_id number primary key, d_name varchar2 (20); create sequence dept_sequence start with 1 increment by 1; www.2cto.com -- employee

Basic PL/SQL syntax (2) identifier is the name of a PL/SQL object, which generally includes constants or variables, cursors, reserved words, exceptions, processes, functions, triggers, etc. Generally, www.2cto.com identifiers must comply with the