Oracle

Script: #! /Bin/bash Newfilename = 'date + % Y % m % D'. dmpNewlogfilename = 'date + % Y % m % D'. LogCD/Oracle/backup Exp user/Password Buffer = 102400000 file =/Oracle/backup/dump. dmp log =/Oracle/backup/dump. Log tables = (tablea, Table2,

Blocks, segments, and zones in Oracle Oracle tablespaces (tablespace), segments (segment), disk partitions (extent), and blocks are the allocation units used by Oracle to save database objects.A segment is a database object that

In actual work, you sometimes need to modify the user name, and the common practice is the exp imp method. If the data volume is large, the exp imp method will waste a lot of time, the following describes how to modify the user name by modifying the

Paging Query format: Select * from (select a. *, rownum rn from(Select * From table_name) A where rownum = 21 Select * From table_name indicates the original query statement that does not flip pages. Rownum > = 21 control the range of each page

Envirement: Windows XP, Oracle 10g Problem: When I open the EM browser, it shows that: "The database status is currently unavailable. it is possible that the database is in Mount or nomount state... "Then I go to start up, I input the OS and

I recently learned how to use proc for Oracle application development. However, I did not have much detail about this on the Internet. After some twists and turns, I finally completed a test case. The function implemented by the program is very

This ORA-38301 occurs when a stored procedure creates a table: the DDL/DML error cannot be performed on objects in the recycle bin. It turns out that this is a new 10 Gb feature, recycle bin. Drop tables are not directly deleted. It is placed in the

1. Complete database backupExpSystem/password @ SidFull = y file = D:/system. dmp log = D:/system. Log 2. Data warehouse receiving(A) Delete SDE and SDE user from the databaseDrop user SDE cascade;Drop user sdeuser cascade;(B) Create a New SDE user

In Oracle databases, ''is equivalent to null. Both indicate null values, rather than Null strings like ''in other databases. null indicates null values.   Oracle allows blank fields of any data type, except for the following two cases: 1. primary

SQL> sqlplus/As sysdba SQL> exec dbms_workload_repository.create_snapshot SQL> Exec: snap_id: = dbms_workload_repository.create_snapshot SQL> var snap_id number SQL> Print snap_id SQL> @? /Rdbms/admin/awrrpt. SQL Oracleawr quick query   1.View the

The procedure is as follows: 1. 1. Create a C:/backup folder on the server (Folder path selected by the customer). 2. 2. Open dbbkup. bat --> modify the red part --> Save exp system/manager @ test file = D:/orabackup/% Date :~ 0, 4% % Date :~ 5, 2

I. Install the susu9 Operating System II. Install the C/C ++ RPM package III. Use yast2 to check whether the following RPM package is installed (I remember to install all the RPM packages related to C/C ++) after, only the gnome and sysstat RPM

1,Ceil (N)Function: Take a value greater than or equal to a value.NThe smallest integer   2,Floor (N)Function: Take a value less than or equalNThe maximum integer   3,InstrAndLimit B: Query the position of the target string in the source

I,$ VI $ ORACLE_HOME/Network/admin/sqlnet. ora If the sqlnet. ora file does not exist, generate the file as follows: 1) You can copy $ ORACLE_HOME/Network/admin/samples/sqlnet. ora to the $ ORACLE_HOME/Network/admin/directory. 2) use the netca tool

One or several autonomous transactions can be defined in one of your transactions (outer transactions. An autonomous transaction can be committed independently without affecting the outer transaction. Similarly, the rollback of the outer transaction

I. Technical Points 1. dbms_obfuscation_toolkit.md5Dbms_obfuscation_toolkit.md5 is an MD5-encoded data packet function, but an error message is displayed when select dbms_obfuscation_toolkit.md5 (input_string => 'abc') A from dual, it seems that

1) CheckOracleSystem temporary tablespace size: Select sum (bytes)/1024/1024 "Temp size (m)" from dba_temp_files where tablespace_name = 'temp ';   2) QueryUndoTablespace size Select sum (bytes)/1024/1024 "Current undo size (m)" from dba_data_files

The following describes the Import and Export instances.Data export:1. Export the database test completely, and the username System Password Manager is exported to D: \ daochu. dmp.Exp system/manager @ test file = D: \ daochu. dmp full = y2. Export

1. First, let's take a look at the differences between Oracle and sqlserver. A database in Oracle is an instance, while in SQL Server, multiple databases can be created under an instance. From the user perspective, one Oracle user is a schema

  1. query the records of the row Select Sal from EMP where rownum = 1; // query the first row of records. Select Sal from EMP where rownum = 5; // The fifth row record cannot be queried because rownum is always queried from 1, therefore, this