Oracle

Reprint: http://www.cnblogs.com/yangxia-test/archive/2012/09/20/2695617.htmlImplementing select Top N in Oracle:Because Oracle does not support the SELECT top statement, it is often used in Oracle with order by and RowNumTo implement the query for

--==================================== Stored Procedure ===============================================/**scm_iss.test_imit_ pro1* no parameter stored procedure */create OR REPLACE PROCEDURE Test_imit_pro1 as P_imti_name VARCHAR2 (200); X_message

Add a column:ALTER TABLE Emp4 Add test varchar2 (10);To modify a column:ALTER TABLE Emp4 Modify Test varchar2 (20);Delete a column:ALTER TABLE emp4 drop column test;Here are a few places to note, first, add and modify the column is not required to

One, character functionsThe character function is the most commonly used function in Oracle, so let's see what the character functions are:Lower (char): Converts a string to a lowercase format.Upper (char): Converts a string to an uppercase

1. Randomly take records from the tableSELECT * FROM (SELECT * from staff ORDER by Dbms_random.random)Where RowNum To randomly fetch 3 records from the staff table2. Generate Random NumbersSELECT Dbms_random. RANDOM from DUAL;produce a random number

--1, querying system tablespace informationSELECT * from SYS. Dba_tablespaces;--2, query table space where the path informationSELECT * from Dba_data_files;--3, querying user-owned table spacesSelect U.username as user name, u.default_tablespace as

Description: JAVA springmvc+mybatis (Oracle and MySQL) HTML5 new tall background framework1. Support App mobile app (Android and iOS) interface call (JSON interface can be interfaced with other programs)2. New tall Changquan html5+css3.0 development

SQL statement for querying and deleting duplicate recordsTransferred from: http://www.cnblogs.com/252e/archive/2012/09/13/2682817.html1, look for redundant records in the table, duplicate records are based on a single field (ID) to determineSELECT *

The database and the client are on different machines.Before installing, navigate to the following folder on the server where the Oracle database is installed.Change localhost in Listener.ora and Tnsnames.ora to the IP address of the machine, my 192.

--Create table/*create table test_table (STUDENT VARCHAR2 ($), SUBJECT VARCHAR2 (+), GRADE number) Tablespace Syste M pctfree pctused Initrans 1 Maxtrans 255 storage (initial 64K minextents 1 Maxextents Unlimited); *//*insert into test_table

Oracle's Index instance tutorial-basicsIndex is an object in a relational database that holds the location of each record in a table, with the main purpose of speeding up the reading speed of the data and checking the integrity of the data. The

There was a problem querying this comment after annotating the table:Add notes to a tableComment on table emp is ' employee table ';Query commentsSelect COMMENTS from user_tab_comments where table_name= ' emp ';Results:Row not selectedChange

New TXT fileInsert the start statement, I here is 11g, you modify the name according to your own version, you can right-click on the computer-"management to find the Oracle service message properties, the namenet start ORACLESERVICEORCLnet start

One: The first is to copy the JDBC driver package Oracle6.jar to the Llib directory under the Tomcat installation pathII: Enter the following code under the meta-inf\context.xml file in the Web project directory (pay special attention to the folder

EXP/IMP/SQLPLUS/EXPDP/IMPDP are EXE files that are stored in the Oracle Bin directory where sqlplus is actually called exp/impexpdp/ IMPDP provides high-speed, parallel, and big data migrations for Oracle data if you have these files, you can use

Hello everyone, this is a small part of me to tidy up every time the project to deploy the server in the field of the most commonly used Oracle database SQL statements, I hope to help everyone.--Create a data table spaceCreate Tablespace

Http://hi.baidu.com/rebooo/item/12b500b130022bf263388e69 assumes A is the primary table (which contains a table with a primary key) and B is from the table (that is, the primary key that references A is the foreign key). When a table is deleted, if

Oradebug promotes scnSometimes we encounter the following errors: ORA-01092: ORACLE instance terminated. Disconnection forcedORA-00600: internal error code, arguments: [2662], [0], [5685940], [0], [5685970], [4194432], [], [], [], [], [], []Process

Oracle _ control User PermissionsZookeeper Oracle _ control User Permissions ① PermissionDatabase Security:System SecurityData securitySystem permissions: Database PermissionsObject permission: permission to operate on database objects 1. System

Centos6.5 install Oracle11gR2 (64-bit)Centos6.5 install Oracle11gR2 (64-bit) and centos6.5 (My virtual machine environment) 1. Download The centos6.5 installation package. For example:2. Download the oracle installation package, which is not