Oracle

When we accidentally operate the database data loss, change, we need to do a point-in-time recovery of database objects, find the data we need, this point of time can not be considered accurate, we can be analyzed by the Oracle log, and get no

 1. Previous section Review2. Maintaining the integrity of the data3. Managing Indexes4. Managing Permissions and Roles1. Mastering the skills to maintain Oracle data integrity2. Understanding the concept of indexing, indexing is established3.

The most common use of stored procedures is to query a data table and return a result set.In SQL SERVER, this type of operation is easiest and can be done with a simple select * from XX. But this is not supported in Oracle, so how do we implement

Get information about a tablecan be directly describeDESC[RIBE] table_name;You can use the data dictionarySELECT * FROM User_tableswhere table_name =xxxx; [or WHERE table_name in (' xxxx ', ' xxxx ')]Renaming a tableRENAME Table_old_name to

Http://www.jb51.net/article/42369.htmSql:charindex (' String ', field) >0 charindex (' Administrator ', Muserid) >0Oracle:instr (field, ' String ', >0) InStr (Muserid, ' Administrator ', ") >0In the project, we used the function of INSTR in Oracle,

Oracle's user passwords have been modified frequently, but user names are rarely modified.Before you can create only one user 1, then import user 2 data to User 1, and then delete by user 1, this is very cumbersome and time-consuming, and today we

question one: How to reset the Oracle sequenceAfter the Oracle sequence is created, if you want to reset the sequence starting with 0 and gradually increment by 1, you can use the following stored procedure:Create orReplace procedure reset_seq(p_seq_

1. Connect the óracle:Sqlplus Username/[email protected] [as SYSDBA]Sql>startup Force [Nomount/mount/open/force/restrict]Sql>shutdown [Normal/transactional/immediate/abort]2. Start the console:Mysqld-nt–install (compressed installation into

The 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 help optimize the analysis of a robust system program.1.SQL code1

1. Standard Insert-single row insertSyntax: INSERT into table [(Column1,column2,...)]   VALUE (value1,value2,...)    Example: INSERT into DEP (Dep_id,dep_name) VALUES (1, ' technical Department '); Note: Only one piece of data can be inserted using

http://blog.itpub.net/27157/viewspace-425567/Initialize related parameters job_queue_processesAlter system set JOB_QUEUE_PROCESSES=39 scope=spfile;//maximum value cannot exceed Job_queue_interval = 10//Schedule Job refresh frequency in

Oracle Analytics function over is widely used.Used to calculate a group-based aggregate value, which differs from aggregate functions in that multiple rows are returned for each group, whereas aggregate functions return only one row for each

Table Backup ModeBackup: Exp system/[email protected]:1521/db owner= (user) File=e:\db\db20150326.dmp tables= (table);Restore: Imp system/[email protected]:1521/db fromuser= (user) Touser=user file=e:\db\db20150326.dmpUser Backup ModeBackup: Exp

1. Create a sequenceThe syntax format for an Oracle sequence is:CREATE SEQUENCE sequence Name[INCREMENT by N][START with N][{Maxvalue/minvalue n| Nomaxvalue}][{cycle| Nocycle}][{CACHE n| NOCACHE}];1) INCREMENT by is used to define the step of the

In an Oracle 10g R2 RAC Environment, there are three nodes C1, C2, C3,However, due to an error operation, OCR is destroyed, and the disk backup only C1, c2 two node state, restore the OCR disk, so C3 lost.The following issues are found in the

In Oracle in the sequence serial number is called, every time, it will take the initiative to increase itself, by the sequence number needed to sort the general use.1. Create SequenceYou must first create sequence or create any sequence

The libraries in the ASM instance of the RAC server are corrupted, some data files are missing, and control files and SPFile are lost. The DB instance is also in the shutdown state.1, find the location of the backup sliceBy looking, the backup slice

The database and the client are on different machines.Before installation, during the installation process, Oracle database server navigates to the following folder.Change localhost in Listener.ora and Tnsnames.ora to the IP address of the machine,

The sixth day of oracle LearningZookeeper 1. Review in the previous section2. PL/SQL Introduction3. Basic PL/SQL Understand oracle pl/SQL conceptsMaster PL/SQL programming technology (including programming process, functions, triggers, packages ...)

Oracle sequence Reset Question 1: How to reset the oracle Sequence After the oracle sequence is created, if you want to reset the sequence from 0 to 1, you can use the following stored procedure: Create or replaceprocedure reset_seq (p_seq_name in