Oracle

related tests for flashback and archiving Reference blog:http://www.cnblogs.com/hellojesson/p/7050097.htmldatabase management reference in archive Mode blog:http://www.cnblogs.com/hellojesson/p/7182219.htmlScenario Description:The local database is

Oracle Stored ProceduresI. Description of stored Procedures1) Description:1. A stored procedure is a PL/SQL statement block for a specific operation2. Stored procedures are pre-compiled, optimized and stored in SQL memory, the use of the need not to

Relationship between two parameters: Sessions=1.1*processes+5The current summary of the statement, in view of the data connection is very useful, after writing the program while testing the code side to see the release of database connections to

ALTER TABLE t move and ALTER TABLE t shrink space can be used for segment shrinkage, reducing high water HWM,can also be used to eliminate row Chaining and row migration (row migration),But there are the following differences:1) using ALTER TABLE

Process Control Function DECODEIntroduction to the Decode () function:Main functions:Translate the results of the query into other values (i.e. in other forms, as illustrated below);How to use:Select decode (ColumnName, value 1, translation value 1,

All tablesSelect from // tables owned by the current user Select from // Selectfrom// including system tablesNotes for TablesSelect * from // comments for the current user owning the table Select * from // comments for all user tables

On the whole, Oracle's bad blocks can be divided into two scenarios: physical damage and logical corruption. Physical damage is caused by storage, which causes Oracle to find that the block's checksum is inconsistent when it processes data blocks.

The table used in this article is the three tables that are available from Scott users:Basic SELECT statementBasic syntax:SELECT [DISTINCT] *| {Columnl,column2,column3.} From table [where {condition}];Select [whether to reject duplicate data] *|

As we all know, the output structure of static SQL must also be static. For classic row-to-column problems, if the number of rows is variable, the standard answer is to use dynamic SQL, which is a pivot with XML results in 11G.But Oracle 10G does

Although I used to see a lot of descriptions of the Oracle lock mechanism on the Internet, I always felt that there was something wrong with it, so it took a little time to refer to Tom Tyke's "Oracle 9I/10G/11G Programming Art" to sort out the

For rownum It is the number of the Oracle system order assigned to the rows returned from the query, the first row returned is assigned 1, the second row is 2, and so on, this pseudo field can be used to limit the total number of rows returned by

Data export:1 full export of database test, user Name System Password Manager exported to D:/daochu.dmpExp System/manager@test file=d:/daochu.dmp full=y(Remote: Exp jeesite/[email protected]:1521/orcl file=d:/daochu.dmp owner= (jeesite))2 Exporting

The simplest way to open an archive in an ASM stand-alone environment.Environment: oracle11g 11.2.0.4Login Sqlplus[Email protected] ~]$ Sqlplus/as SYSDBASql*plus:release 11.2.0.4.0 Production on Thu June 8 18:20:41 2017Copyright (c) 1982, Oracle.

When inserting data into a database, most of the time the self-increment column or UUID is used as the primary key. The value of the primary key is not known until it is inserted, but in many cases we need to use the primary key that we just

[Email protected]:/] $crs _stat-tName Type Target State Host------------------------------------------------------------Ora .... TA01.DG ora....up.type Online Online udevasmOra .... TA02.DG ora....up.type Online Online udevasmOra .... VERY.DG ora....

Constraint (Constraint): A restriction on the column properties, fields of the created table.such as: Not Null/unique/primary key/foreign Key/checkScope of Action:① column-level constraints only work on a single column② table-level constraints can

1. What is a transactionIn a database, a transaction is a logical unit of work, a transaction consists of one or more SQL statements that complete a set of related behaviors, ensuring that the operations of this set of SQL statements are executed

Today's newly installed Oracle 12.2.0.1 database, via local sqlplus telnet 12c database error ora-28040, as follows:Ora-28040:no Matching authentication protocolSolution (pro-test feasible):Into the $oracle_home/network/admin, Edit the Sqlnet.ora

First, view the current user information:1. View the current user-owned Role Permissions information: SELECT * from Role_sys_privs;2. View the details of the current User: SELECT * from User_users;3. View the current user's role information: SELECT *

Operating system: Windows 7Database: Oracle 11gR2First step: Download the Oracle installation packageOracle Official Website: https://www.oracle.com/index.htmlClick Oracle Database 11g Express Edition under the Downloads columnThen click on the