Oracle

First, the same as the graphical interface installation, check the following conditions:New user, GroupCreate the installation directoryConfiguring Environment variablesCheck the installation dependency packagemodifying kernel parameters......The

CREATE TABLE STUDENT (--Creating student tablesID Number (TEN) PRIMARY key,--primary Key IDNAME VARCHAR2 (20),CLASSNAME VARCHAR2 (20)--Class ID);CREATE synonym STU for STUDENT; --Create aliases for student table student (synonyms)INSERT into STUDENT

Zolin ConnectionTable A LEFT JOIN B table on conditionExampleTable Ab tableSELECT * from A left JOIN B on a.aid = B.bid;Results:The data Zolin the query is the data on the left a table and the right B table satisfies the criteria.Null if no data is

--Book by Position place directory drop table bookplacelist; CREATE TABLE Bookplacelist (Bookplaceid INT PRIMARY KEY,--numberbookplacename nvarchar2 ($) Not Null,bookplacecode Varc Har (+) NULL,--location encoded bookplaceparent INT

http://blog.csdn.net/weiwenhp/article/details/8093105We know that SQL Server and Oracle have many similar principles. In particular, some commonly used SQL statements are based on standards. So they can also have some interoperability. Here's how to

1, develop a good habit of becomingStatement 1:select * from TB_SHIYQ;Statement 2:select * from TB_SHIYQ;These three statements at first glance are the same, but the cache is not recognized, is the full character match, the index in the cache will

Test environment: Win7 64-bit flagship +JDK7 (64-bit)Installed software: Oracle 11g R2 64-bitFollow the online general tutorial installation completed database, found a bunch of problems, close up this note.1, using SQL Developer login,

An empty table cannot export an issue:Data Discovery There's a new feature in Oracle 11g : A new parameter "deferred_segment_creation" means that paragraph delay is created, which is true by default . What does it mean

Oracle study's--nls_date_formatSystem environment:Operating system: RedHat EL6Database: Oracle 11gR2When setting the time format in Rman, error:650) this.width=650; "Src=" http://img.blog.csdn.net/20150513193624565?watermark/2/text/

MySQL date and Character conversion methodDate_format (date, '%y-%m-%d ')--------------To_char () in >oracle;Str_to_date (date, '%y-%m-%d ')--------------to_date () in >oracle;%Y: Represents a 4-digit year%y: Represents the year of 2%m: Represents

The first parameter is ' USERENV ', is fixed, the second parameter is fixed, but is a multiple-select fixed, the optional value is as follows:Select Sys_context (' USERENV ', ' Authentication_type ') the authentication type from the dual;--user

1. Package A package is a combination of a set of related procedures, functions, variables, constant #sinaeditor_temp_fontname, types, and cursors, such as PL/SQL programming elements. The package has an object-oriented design and is the

The project used a 64-bit Oracle, but the local use of 32-bit plsql, so the Chinese is always displayed in the Plsql is garbled, began to think it is a database problem, after verifying the database has no problem, the Internet search for an

1. Add columnsALTER TABLE table_name ADD (column datatype [DEFAULT expr][,column datatype ...]);For example:Sql>alter TABLE emp01 ADD Eno number (4);2. Modifying the column definitionFor example:Sql>alter TABLE emp01 MODIFY Job VARCHAR2 (15)2

From:P17694377_121020_linux-x86-64_1of8\database\readme.html Oracle Database (includes Oracle database, Oracle RAC, and Deinstall)Note:you must download both zip files to install Oracle Database.

PowerDesignerConfigurationOracleDatabase Reverse EngineeringDeng JiahaiPaste: Software Channel bar1. Preface:PowerDesigner is Sybase's enterprise modeling and design solution that combines business and it with a model-driven approach that helps to

Managing Memory in Administrator's Guide, managingdire Automatic Memory Management 1. If you want to enable Automatic Memory Management, how can you determine the value of MEMORY_TARGET? 1> show parameter target under SQL * Plus. The result is as

Use the DBMS_SCHEDULER package to manage scheduled tasks and dbmsscheduler Dbms_scheduler is a package provided by Oracle to create scheduled tasks. The task type can be PL \ SQL program, external scripts, and operating system commands. It is

Brief Analysis of replacement functions in oracle Replace is a string replacement in the general sense. Replace (c1, c2 [, c3]) Find string c2 in string c1 and replace it with c3. If c3 is null, all C2. update jd set id = replace(id,'1','2'); It

Input arrays to Oracle and execute SQL statements in batches. oraclesql 1. Create a package using PL/SQL 1 create or replace package excuteBatchOperate2 as3 type sqlStr_Array is table of varchar2(1000) index by binary_integer;4 procedure