Oracle

Manually remove Oracle completelyFirst step: Disable all Oracle ServicesStep Two: Delete the Oracle RegistryRun regedit to find the Oracle key value in the following path,

1. Select FOR update2. Foreign key does not create index(1) There are frequent deletions on the main table(2) There are frequent modification operations on the primary key.(3) The main table and the associated query from the table are often present

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 下面为您介绍的语句用于实现Oracle查询用户所有表，如果您对oracle查询方面感兴趣的话，不妨一看。select * from all_tab_comments -- 查询所有用户的表,视图等select * from user_tab_comments --

The first n results can be extracted directly from the MS SQL Server database using top (n), which cannot be used directly in Oracle. Oracle provides a way to extract the results of the first n bars by using line numberingExample: SELECT

In use. NET when using OracleParameter for Oracle database operations, because Oracle and SQL Server have different syntax for query parameterization,When you operate SQL Server, you are using @ParameterName.And Oracle is using :P arametername .and

the Oracle bitand () function Oracle database is very common, here is a detailed description of the use of the Oracle Bitand () function, if you are interested, may wish to see. Oracle Bitand () function:Returns the result of two numeric numeric

This is a few days of the Oracle database, probably used by SQL Server, it is not easy to feel. PL's interface-friendliness is far worse than SQL Server, since it has acquired pl.Why not give it a little bit of a job? Various inconveniences.

1. EXP　　1a> Full Mode full=y2 3EXP User/[email protected] (as ROLE) buffer=64000 File=c:\full. DMP full=y4 5B> User Mode owner=User6 7EXP User/[email protected] buffer=64000 file=c:\user. DMP Owner=user8 9c> Table Mode tables=tab_*Ten OneEXP

1. Partitioning technology2. Indexing technology3. Temporary table Technology--Create a transaction-level temporary table, the data will be lost after commit, but the table structure still existsCREATE GLOBAL Temporary TABLE

Common scenarios: When the Oracle database is backed up from the server and then restored to the local machine, the character encoding of the database is inconsistent, you can run the following command to modify the character encoding of the local

1. Install OEL 5.6 Ii. Install VMware Tools 1) Select the VM option in the menu. The sub-option is installVMware Tools and select it. 2) return to the operating system and mount the optical drive to/mnt. [Root @ tyger ~] # Mount/dev/cdrom/mnt Mount:

Test environment: Install Oracle Enterprise Linux 5.8 64-bit Virtual Machine in VMware Workstation v9.0.2 Install software: jdk-7u40-linux-x64.rpm?apache-tomcat-7.0.53.tar.gz Installation instructions: Download jdk-7u40-linux-x64.rpmand

1. Naming rules for tables and columnsA. It must start with a letter.B. The length cannot exceed 30 charactersC. Oracle reserved words (keywords) cannot be used)D. Only the following characters can be used for A-Z, a-z, 0-9, $ ,# 2. Create a

1. IP address error:URL setting error, for example: jdbc: oracle: thin: @ 192.168.1.80: 1521: orclWhether the database server is correct: ping the Server IP address. The ping rule does not change the URL correctly.Whether the port number is

The data center is powered off, so oracle's slave database must be restarted: 1. log on to sqlplus and start it. An error message is displayed: SQL> STARTUP MOUNT;ORA-16032: parameter LOG_ARCHIVE_DEST_3 destination string cannot be translated 2.

1. Assign "system permissions" to someone"SQL> grant connect to aobama with admin optionThis means that the admin database connection permission is granted to "aobama", and "aobama" can grant this permission to others. 2. Questions about permission

After several years of death in Oracle, I am familiar with different books. Many of my friends asked me to recommend some Oracle books. I will share my views below. In fact, at different stages, different books will have different influences on you,

It may be inconvenient to get used to Oracle databases over the past few days. PL is much more user-friendly than SQL server. Since PL has been acquired Why not do it a little better? Various inconveniences. Depressing Insert a data entry to the

If you accidentally overwrite the previous stored procedure, You have to flash back quickly. The longer the duration, the less likely it will be to flash back. The principle is very simple. The definition of a stored procedure is a data dictionary.

-- Oracle Auto-increment id -- create a T_StudentInfo table create table T_StudentInfo ("id" integer not null primary key, xsName nvarchar2 (120) not null, xsAge integer not null, mobile varchar (12), Email varchar (50), Address nvarchar2 (300); --