Oracle

1. Basic grammarselect * from table [start with condition1] connect by [prior] id=parentidGenerally used to find the existence of a parent-child relationship data, that is, tree structure of data, and its returned data can be clearly

1: Log in to Plsql Developer, write a stored procedure, insert a value into a table, and run the stored procedure2: Open the plsql Developer Command Window.--Terminate procedure11.select * from V$access a Where object like ' setemusercontext% 'Note:

Once the Oracle database is installed, it will bring a Scott account, which will have an EMP table 1. The command to unlock the Scott account alter the user Scott account unlock;2. Modify the password for the Scott accounts alter user Scott

SQL syntax Exercise: 1, select all employees in department 30 select * from EMP where deptno=30;2, lists the clerk's name, number and department number select ename, empno, deptno from Empwhere job=u Pper (' clerk '); 3, find the employee with a

Table T_user1,t_user2,t_user3, each with id,name two columns Id Name 1 10A 2 20A Id Name 1 10B 3 30B

SET serveroutput on;declare input_string VARCHAR2 (32): = ' 12345678 '; Ikey INTEGER: = 100001; Input_raw Raw (+): = Utl_raw. Cast_to_raw (input_string); Key_raw Raw (32); Encrypted_raw Raw (32); Encry_key VARCHAR2 (32); Decrypted_raw Raw (32);

Today is the last day of work in April, the holiday will start tomorrow! ~ Three days! I hope I can make use of these days to fill a good professional knowledge, this evening began to learn SQL optimization course!General optimization1: Try to avoid

Create or Replace functionRemove_same_string (oldstrvarchar2, Sign varchar2)return varchar2 is /**************************************************** * * Oracle Removes duplicate String * * Function Name: REMOVESAMESTR * * parameter: "Name" " Type

I. Using profile to manage user passwordsOverview: Profile is a collection of commands that are password-constrained and resource-constrained, and when a database is established, Oracle automatically establishes a profile called default. When the

After successfully installing Oracle 11g in accordance with the methods in Windows 7 64-bit installation of Oracle 11g R2, there are 7 services that have the meanings of seven services, respectively:1. Oracle ORCL VSS Writer service:oracle Volume

The character set of Oracle is determined by the parameter Nls_lang:The Nls_lang parameter consists of the following parts:Nls_lang=_.Nls_lang the meanings of each part are as follows:language specifies the language to use for Oracle messages, the

queries for Oracle partitioned tablesIf the [partition table] is partitioned on the field [CreateDate], each month is a partition: June 2009 is partition P2009062009 year July is partition P2009072009 year August is partition P200908Execute SQL

Quote this big: Http://www.cnblogs.com/lovemoon714/archive/2012/02/29/2373695.html 1. Why should I use the package? A: In a large project, there may be many modules, and each module has its own procedures, functions and so on. And

Quote this big: Http://www.cnblogs.com/lovemoon714/archive/2012/02/29/2373780.html 1. Concept and use Similar to a custom type in C, you can use it to define a field collection for a table.Defines the format type Recordname is Record

Permissions:Create sessionCREATE tableUnlimited tablespaceConnectResourceDbaCases:#sqlplus/nologSql> Conn/as sysdba;Sql>create user username identified by passwordSql> Grant DBA to username;Sql> Conn Username/passwordSql> select * from

This article explains the parameters of the storage when creating a new table in an Oracle database, using charts and examples.Available for: Table spaces, rollback segments, tables, indexes, partitions, snapshots, snapshot logs

I. Basic knowledge of the database1. ConceptDatabase full Name database management system, referred to as DBMS, is a kind of technology to manage, store and share data in computer.2. ClassificationIn the process of database development, according to

After installation, start with the following# Listener.ora Network Configuration file:d:\oracle\app\administrator\product\11.2.0\dbhome_1\network\admin\listener.ora# Generated by Oracle configuration tools. Sid_list_listener=(Sid_list=(Sid_desc=(Sid_

0009 notes 05-Table creation and constraints, SQL required notes 05- 1. CREATE a TABLE: Use the create table statement to specify the TABLE name (which cannot be the same as the existing TABLE name), column name, and data type of each column. CREATE

OracleLogminer configuration and usageLogMiner configuration User Manual 1 Logminer Introduction 1.1 LogMiner Introduction Oracle LogMiner is a very useful analysis tool provided by Oracle company after 8i. It can be used to easily obtain the