Oracle

In Oracle, how can I use SQL to check whether a field contains Chinese characters?   Today, a colleague migrated data.ProgramThere is a problem. I didn't consider Chinese encoding characters. Because the migrated table has tens of millions of

It's not the first time I got in touch with Oracle. I still installed it before and remotely connected to the server from PLSQL developer, but I never did it. This time, I gave a DMP file to be imported into the database. It took a lot of effort for

Not to mention the complexity.CodeImplement Auto-increment Fields   Create a table with PL/SQL Dev, field name ID, type number ()   Using PL/SQL to create a sequence, which can be implemented simply by directly graphical operations.   Then

  Create userCreate user... identified by PWD; Delete a userDrop user... cascade; Create a tablespaceCreate tablespace ts_drp datafile 'd: \ drp-date.dbf 'size 2000 m Allocate tablespace to usersAlter user... default tablespace

Specify the index statement when Oracle queries or deletes the query. You can specify the index statement when querying. Select/* + index (tb_alias ix_g_cost3 )*/Tb_alias .*From g_cost tb_aliasWhere item_two = 0And flight_date> = to_date ('201409

% Type attributeIn PL/SQL, you can declare variables and constants as built-in or user-defined data types to reference a column name and inherit its data types and sizes. This dynamic value assignment method is very useful. For example, the data

Oracle development tool PL/SQL is a powerful tool for Oracle development and use. At the same time, Oracle is intended for users. A single user role may be used by multiple people at the same time. It is common in group development. Operations on

This is also an old problem. Simply write it here, so that the next time you encounter it, you will not be overwhelmed by headless flies.You can use oledb to connect to an Oracle database. Generally, there are two kinds of providers.A: provider =

Create Table B(Store varchar2 (100 ),Sales Volume varchar2 (100 ),Price: varchar2 (100 ),Date)Tablespace users / Insert into B (shop, sales quantity, price, date)Values ('A', '3', '123', to_date ('01-01-2011 ', 'dd-mm-yyyy '));Insert into B

Reproduced original address: http://blog.csdn.net/allen3010/article/details/6273485Create Table test: Create Table Test (ID number, // number name varchar2 (10), // name sex varchar2 (2), // gender age Number, // age address varchar2 (200) //

Today, a colleague asked me how to dynamically call the stored procedure in Oracle PL/SQL. I think there should be no problem. I just tried OK, mainly using the execute immediate syntax, note that the in and out parameters are specified in using.

Although 11g is not officially used, you still need to pay attention to the new features of Oracle 11gr2. The following is an introduction to Oracle 11gr2 performance optimization:   Note: Stored outlines = storage Overview SQL Plan Management (SPM)

1. Stop all Oracle services 2. Delete All Oracle items in the Registry (1) Delete the Oracle directory under HKEY_LOCAL_MACHINE \ Software (2) Delete All Oracle items under HKEY_LOCAL_MACHINE \ SYSTEM \ controlset001 \ Services (3) Delete All

The materialized views of Oracle provide powerful functions that can be used to pre-calculate and save the results of time-consuming operations such as table join or aggregation. In this way, when performing a query, you can avoid these

The Database Server suddenly collapsed, and the hardware was faulty. a P4 machine was found for the moment to replace it. After Windows 2000 Server was installed, Oracle 8.17was installed. The problem was found. There was no response to the

I. Introduction to Oracle partitioning Oracle partitioning is a technology that processes ultra-large tables and indexes. Partitioning is a "divide and conquer" technology. By dividing large tables and indexes into small pieces that can be managed,

I seldom use any, some, and all in my daily work. Today I suddenly see this usage, which is very good and should be used in my work;   Use some, any, and all to process the multiple rows returned by the subquery. Next we will briefly introduce the

Based on the database log structure changes, Oracle goldengate obtains incremental data by parsing the source online logs or archiving logs, and then applies these changes to the target database, this allows you to synchronize data between the

Document directory Shutdown normal: Shutdown transactional: Shutdown immediate: Shutdown ABORT:    Oracle shutdown and startup Shutdown command Shutdown has four parameters: Normal, transactional, immediate, and abort. If no parameter is

Database Server Character Set select * From nls_database_parameters, which is derived from props $ and represents the character set of the database. Client Character Set environment select * From nls_instance_parameters, which is from V $ parameter,