Oracle

Undo Tablespace Management is one of the most important daily tasks of Oracle DBA, and the undo tablespace is used to temporarily store data for DML operations, with the following main functions:1. Transaction rollback2. Instance Recovery3. Read

On Oracle servers, setting the appropriate swap size can improve Oracle performance, and for Oracle 11g, the physical memory on the Oracle server and the swap size to be set are as follows: If physical memory is less than or equal to 2GB, Then swap

1. Installed Oracle 12c Client for Windows, received from colleagues, said to be 64-bit, but I did not find contains 64 such file name or the contents of 64 bits.The 64-bit version of plsqldev1104, which was obtained from colleagues, also has a 936 3

Below is a description of the Scheduled cleanup archive log file operation under Oracle.Assumption: The archive log is full and the archive log is emptied as follows.First step: Create a Rman_del.txt file under C driveStep two: Do a batch file named:

---Stop Job 25 is an established jobbeginDbms_job.broken ( -, True); Commit; End; --Start JobbeginDbms_job.run ( -); Commit; End; --Delete Job beginDbms_job.remove ( -); Commit; End; --View Execution ResultsSelect * fromTest_jobOrder

Row to column should be the database is more common operation, in Oracle can use pivot, decode, can refer to the blog of the Melon:http://blog.csdn.net/ch7543658/article/details/41146809SELECT name, Max (DECODE (course, ' Java ', Gread)) as

Article source home/database/oracle Database Online Documentation 11g Release 2 (11.2)/Database administration http://docs.oracle.com/cd/E11882_01/server.112/e40540/intro.htm#CNCPT001 Oracle Database Introduction Schema In

Http://www.cnblogs.com/roucheng/p/3506033.htmlTriggers are a technique that is provided by many relational database systems. In Oracle systems, trigger-like procedures and functions have a PL/SQL block that declares, executes, and processes

Recently, the Company development Environment Database server is very unstable, often not connected to the development of a great impact, so you want to back up the database to the local.Since you have been working with the Navicat database, share

-- Turn on line move function ALTER TABLE tablename ENABLE row movement; -- Restore table data at a point in time of deletion or modification Table to timestamp to_timestamp ('2016-05-07/17:01:50',' YYYY-MM-DD hh24:mi:ss'); -- Note: Turn off the

Inquire1, operator:+,-,*,/,,<>, etc. can be used2, Wildcard: _,%, "_" represents a character, "%" represents 0 or more characters.3. Between ... And ... As with =, the query results are closed intervals.4, in (A, B,...) Represents =a, or =b, or = ...

1. Insert Data syntax:INSERT into table_name (column1,column2,...) VALUES (Values1,values2,...); When column names are not written, the default is to insert data for each column.2. View the table structure:DESC table_name;3. Query the data in the

The method for handling the trigger and the concluding remarks during the trigger in a graph of Oracle, And the oracle trigger A trigger in Oracle is a very useful technology. Unlike stored procedures and functions, stored procedures and

Oracle strange result survey memo, oracle memo Recently, I need to maintain an ASP. Net program developed more than a decade ago. I encountered various strange problems and recorded the following problems that are hard to find:   Question 1: The

Detailed introduction to ORACLE sqlplus commands (to) and oraclesqlplus 1. ORACLE startup and Shutdown1. to enable or disable the ORACLE System in a single-host environment, you must first switch to the ORACLE user, as shown below:Su-oracleA. Start

Oracle trigger type, oracle trigger Http://www.cnblogs.com/roucheng/p/3506033.html Triggers are a technology provided by many relational database systems. In the ORACLE system, triggers and similar procedures and functions have PL/SQL blocks that

Common Oracle statements and oracle statements View the database version: 1) select * from PRODUCT_COMPONENT_VERSION; 2) select * from v $ version;   Query all parent Nodes Based on child nodes: SELECT X_LEVEL, X_ID FROM TAB_X start with X_ID =

Go to: Query oracle slow sessions and SQL, oraclesession -- Query the slowest SQL statement Select * from (Select parsing_user_id, executions, sortsCommand_type, disk_reads, SQL _text from v $ sqlarea order by disk_reads desc) Where rownum -- Query

Linux OCI environment configuration and LinuxOCI environment Configuration ORACLE Call Interface (OCI) provides a set of Interface subroutines (functions) that can be accessed to Oracle databases) to access the ORACLE database. Required environment

Difference between statements for querying by page in Oracle, MySQL, and SqlServe, oraclesqlserve ★First, define the parameters to be used in the paging statement: Int currentPage; // current page Int pageRecord; // number of records displayed