Oracle

(1) We have a management account at the end of the installation of Oracle, which can unlock the required accounts, but a lot of people sometimes do not unlock,Let's look at the following. Unlocking an account using the command line(2) Start SQL Plus

This article explains the parameters of the storage when creating a new table in an Oracle database, using charts and examples.Available for: Table spaces, rollback segments, tables, indexes, partitions, snapshots, snapshot logs

If only some of the data is deleted by mistake or a piece of data can be1. Select * from the error deletion indicates that as of timestamp to_date (' Recovery date seconds ', ' Recovery time format ') where query condition ;Example: SELECT * from

+---------+| DB1 |+---------+--Create user and authorizeSqlplus/as SYSDBACreate user U1 identified by U1 account unlock default tablespace USERS;Create user U2 identified by U2 account unlock default tablespace USERS;Grant Connect,resource to

Environment Win7 (+) + Python 2.7.5 +cx_oracle-5.1.3-11g.win-amd64-py2.71. dll is not a valid Win32 applicationImport cx_oracle after running an error "DLL is not a valid Win32 application"After finding out that Oracle's client is using a 32-bit, 64-

Indexes are data objects used to speed up data access, and proper use of indexes can significantly reduce I/O times and thus improve data access performance.Why does the query speed up when the index is added?Single-column index:A single-column

Vempno Emp.empno%type;For example, the above sentence,Your vempno is the variable that you define, and the EMP that is in your database is the table that exists inside of it, his table is intentionally a empno field, and then%type is the data type

1. Describe the difference between a procedure, function and anonymous PL/SQL block. Candidate should mention use of DECLARE statement, a function must return a value while a procedure doesn ' t has To.2. What's a mutating table error and how can I

Introduction to Unix Shell_Shell calling SQLPlus (case study), shell_shellsqlplus 2014-06-20 BaoXinjian I. Summary If you develop a Unix Shell in Oracle EBS, it will certainly involve calling PLSQL in the Shell. In Shell, calling PLSQL usually uses

Restoration Method for oracle Database accidental deletion 1. If you just accidentally delete some data or a piece of data, you can use 1. If select * from is deleted by mistake, it indicates the where query condition as of timestamp to_Date

Oracle Golden Gate BugI have just confirmed a bug of ogg in the production environment (this bug is related to ddl). The ogg version with the bug is: Oracle GoldenGate Capture for Oracle Version 11.2.1.0.25 19181440 19358139 AIX 5L, ppc, 64bit

Solution to ORA-01417 under Oracle11g Today there is a brother feedback, there is a SQL on 12C no problem, on 11G on the error, the error content is ORA-01417: The table can be externally connected to at most one other table. This section analyzes

Oracle Auto-increment ID implementation First, create a table:   Create table test (id number (32) not null primary key, name varchar2 (32 ));   Create sequence test_sequenceINCREMENT BY 1 -- add several start with 1 each time -- count

Oracle undo Reading Notes Two parameters related to undo: Undo_tablespace UNDO_MANAGEMENT = auto After oracle 9i, we recommend that you use undo for automatic management; Undo_retention This parameter is used to ensure that the content in the undo

Check whether duplicate data is stored in the table before oracle inserts data. Sometimes, when inserting data in an oracle database, you need to determine whether the data already exists. Our first thought is as follows: first, execute the

Oracle10G clear junk table An Oracle O & M experience that I learned and worked on is a pitfall step by step. Cause: a set of systems that have been running for five years have been slow to be reflected by customers in the near future. I learned

SQL sorts strings and SQL strings Assume that the string is composed of 'A', 'B', 'C', and 'D' and the length is 7. Set the REPLICATE function (, ) to create a string of n replicas of , REPLACE (, , ), implemented as follows: 1 BEGIN 2 DECLARE

ORACLE File deleted by mistake Today, a colleague found me and said that his database could not be used. I hope I can help with the research. In fact, I do not have any in-depth research on the database, but I like to take a look at the online

Brief Introduction to the environment variable ORACLE_SID[Oracle10g @ lixora ~] $ Export ORACLE_SID = 12323[Oracle10g @ lixora ~] $! SQLSqlplus/as sysdbaSQL * Plus: Release 10.2.0.1.0-Production on Thu Nov 6 02:24:04 2014Copyright (c) 1982,200 5,

Several items before deleting oracle archive logs To delete archived logs, you must confirm the following in advance:1. Whether it is a dg Environment: if it is a dg Environment, check whether the archived logs have been applied to the slave