Oracle

-- Create SequenceCreate sequence Sq1Minvalue 1Max value 999999999999999999999999999Start with 2001Increment by 1Cache 20; Sequence Creation   Create Table testpatition(GID number (10, 3) primary key,Gname varchar2 (36 ),Gdate date)Partition by

Execute immediate replaces dbms_ SQL package in Oracle8i.It parses and immediately executes dynamic SQL statements or PL/SQL blocks created when they are not running. The performance of dynamic creation and execution of SQL statements is advanced,

VPD stands for Virtual Private Database.TechnologyProvidesDataFine-grained access control of database information. For more descriptive information about VPD, seeOracleOfficial documentation:

In Oracle/PLSQL, The substr functions allows you to extract a substring from a string. The syntax for the substr function is: Substr (string, start_position, [length])Note:String is the source string.Start_position is the position for

This articleArticleThe main purpose is to analyze the storage space used for building the system to avoid the waste of storage device transition and save investment. It also improves the common usage of OracleDataType. IntroductionThe types are as

When the Oracle server is running on Windows and in dedicated connection mode, the client cannot be connected when the number of client connections reaches a certain value (about 400. At this point, the client typically gets a ora-12518 error.

. Net to access the Oracle database link: ORA-02041: client database did not begin a transaction problem. . Net to access the Oracle database link: ORA-02041: client database did not begin a transaction problem. . When accessing the object with

Oracle dynamic SQL can be written in two ways: dbms_ SQL or execute immediate. The latter is recommended. The test procedure is as follows: 1. DDL and DML/*** DDL ***/BeginExecute immediate 'drop table temp_1 ';Execute immediate 'create table temp_

Solutions to Em-related problems in Oracle 10 GB The EM in Oracle 10 Gb adopts the web form to manage databases and related services. However, some em-related problems may occur during use. Based on the prompts from the peers and the actual

1. Two Ways to delete table data A. Delete * From my_table; B. truncate table my_table; 2. Delete the entire tableDrop table my_table; How can we recover tables accidentally dropped? In fact, Oracle also has a similar "recycle bin" For

1. Create a table Create TableTest_increase (useridNumber(10)Not Null Primary Key,/*Primary Key, automatically added*/UsernameVarchar2(20)); 2,Create auto-increment Sequence CreateSequence testincrease_sequence IncrementBy 1--Add a

I. Table integrity and constraints Entity Integrity: primary key constraintsDomain integrityIntegrity of reference: foreign key constraints Select constraint_name, constraint_type from user_constriants where table_name = 'emp '; 2. Manage

1. Avoid Dynamic Allocation DefectsCreate a local table space;Set the segment size properly;Monitor the segment to be extended:Select owner, table_name, blocks, empty_blocks from dba_tables where empty_blocks/(blocks + empty_blocks) 2. high water

Common Oracle Data Dictionary tables view the default tablespace of the current user SQL> select username, default_tablespace from user_users; View the role of the current userSQL> select * From user_role_privs; View the system and table-level

References: http://blog.sina.com.cn/s/blog_5157093c0100mrez.html Navicat premiumIs a multi-Connection database management tool that allows youProgramConnect to MySQL, SQLite, Oracle, and PostgreSQL databases at the same time, making it easier to

Package WCG. test. JDBC. oracle; import Java. SQL. connection; import Java. SQL. drivermanager; import Java. SQL. resultset; import Java. SQL. sqlexception; import Java. SQL. statement; public class testconnoracle {/*** @ Param ARGs */public static

Http://blog.itpub.net/post/468/3380 In addition:Introduction to Oracle custom aggregate function InterfacesA. Static function odciaggresponinitialize (sCTX in outstring_agg_type)Return numberSet the initialization of the custom aggregate function.

[Oracle] PL/SQL set Enhancement Builder.com 29/12/2004 URL: http://www.zdnet.com.cn/developer/database/story/0,3800066906,39265363,00.htm Oracle Release 2 has greatly enhanced the PL/SQL collection function. It can performCodeMaintenance.

How to import access data from Oracle (table and data) How to import access data from Oracle (table and data) Time: 2004/07/07 Author: cowbird The database we use is Oracle, but it is not suitable for demonstration due to its large local

Document directory Example Program description   Zookeeper case Additional information Sometimes, Int, bool, and so on may be written into text, such as: , used? : Processing is very convenient, but if you want to add more than two strings