Oracle

It is basically the same as importing other databases. However, the Oracle client is difficult to use.1. Select the database when the model is created.2. Right-click the Class View named Data Model and select import dB schema from ODBC source.3.

Lunatic sorting 1. Notes for deleting a tableWhen deleting all data in a table, the truncate table name must be used. Because when the drop table or delete * from table name is used, the occupied space of the table in the tablespace is not

Some ASP. NET + Oracle 11G systems write-and-learn essays, including Oracle's "batch Update" and Oracle's internal encoding set to the Unicode Character Set. (4) Oracle "batch Update", "batch Add", and "batch Delete" Syntax Oracle can still

1 exp Tuning 1.1 Use direct and recordlength options The direct parameter defines whether to use direct path (direct = y) or conventional path (direct = n) for export ). Conventional path export uses the SQL SELECT statement to extract data from

Use ultraedit32 to open the exported DMP file. The file content is displayed in hexadecimal notation. The second and third bytes of data record the character set of this file. For example: 03 54 Convert it to a 10-digit system with a value of 8

Before executing an SQL statement, Oracle needs to analyze the statement execution plan and then execute it according to the execution plan. The execution plan of the Analysis Statement is composed Optimizer) . In different cases, an SQL statement

The database version installed on my local machine is Oracle 11g R2. When I connect to the database today, the following error is reported: Oracle not available ORA-01034 ORA-27101-shared memory realm does not exist I found several solutions

The table's primary keys are all sequence, and the dataadpter update method is used. I don't know how the predecessors handled it. I am lazy as follows: Public void Update (oracledataadapter ADP, dataset DS) {// DS is obtained by DS. getchanges

Check the SQL statement of the deadlock 1. Select Sid, decode (Block, 0, 'No', 'yes') blocker, decode (request, 0, 'No', 'yes') WaiterFrom v $ lockWhere request> 0 or block> 0Order by block DESC; 2. Select BS. username "blocking user", BS.

As we all know, in 32-bit operating systems such as Win2k, the memory that the operating system can manage is 4 GB (Power (2, 32) = 4 GB), and the total memory used by Oracle is limited to 2 GB. Currently, most information systems can provide

Two solutions:1. Upgrade to 92052. Disable Automatic growth of Undo tablespace 3. to narrow down the current undo tablespace:-- Create an undo tablespace for a new small spaceCreate undo tablespace undotbs2 datafile 'C: \ oracle \ oradata \ eoffice

Problem: After the oracleorahome92tnslistener service is started, it will be automatically disabled, leading to database unavailability.Cause: the host name is changed after oracle is installed.Solution: Modify the D: \ oracle \ ora92 \ Network \

Chapter 1: Log Management 1. Forcing log Switches SQL> alter system switch logfile; 2. Forcing checkpoints SQL> alter system checkpoint; 3. Adding online redo log groups SQL> alter database add logfile [Group 4] SQL> ('/disk3/log4a.

1. Enable the Scott user and specify the password. 2. To enable SQL developer, you must configure the Java Virtual Machine. If it is oracle32bit, you can directly use oracle java.exe. If it is oracle64-bit, you can download the "java7 64bit plugin"

1. Waiting for monitoring cases:Select event, sum (decode (wait_time, 1) Prev, sum (decode (wait_time, 0) curr, count (*)From v $ session_waitGroup by event order by 4;2. rollback segment contention:Select name, waits, gets, Waits/gets ratio from V $

Navicat Oracle features an intuitive GUI and provides powerful visualization tools such as query editor and syntax highlighting capabilities when previewing SQL, SQL console, text, hexadecimal and blob view/Editor, ssh tunnel and more to improve

Table Schema: Create Table "sa". "tb_nclob"("ID" number (8, 0) not null enable,"Name" varchar2 (20 byte ),"Text" clob) C # code 　　 public static void InsertWithLob() { if (mConnection != null && mConnection.State == ConnectionState.Open)

ArcSDE for sqlserver Installation Process 1. Windows 2000 SP3, SQL 8.3 SP3 sde8.2 with SP1, ArcInfo The computer name is zongzhan-6afuly1, SQL2000 installation is installed by default. The installation directory of Sde is D: \ arcgissde \. 2.

Convertible tablespace: a set of self-contained and read-only tablespaces are used to export only metadata. At the operating system layer, the data files of these tablespaces are copied to the target platform and the metadata is imported into the

The common time format mask is as follows:Mask element meaningYYYY four-digit year (for example, 2005) yearYY two-digit year (for example, 05)Q quarter (1-4)MM month (01-12) monthThe number of weeks in WW (1-53), in which the first week is the first