Oracle

Purpose: The client's server is Windows Server 2008 R2, which installs Oracle 10g 10.2.0.1. Reasons and Solutions: It was later found that the installation file is 32 bits, the operating system is 64 bits, the version does not match, and Oracle

1. Simple introduction to the collection query Key words Union: Unions (returns all records after two sets remove duplicate elements) UNION ALL (returns all records of two sets, including duplicates) Intersection: Intersect (returns records that

Preface Database backup is one of the most important tasks of production environment DB server, and regular automatic backup helps us to quickly locate and restore abnormal or problem data, and this blog will simply record how to automate daily

Oracle to Oracle version Usually to the customer production environment deployment reference documents, summary of the more detailed, mainly detailed description of the process of data initialization, parameters of different environments, so just

Oracle DB In-memory is pre-installed in Oracle database 12c (12.1.0.2 version) without the need to install additional software or recompile existing database software. This is because the in-memory option is seamlessly integrated into the Oracle

In Exadata, it is best to run Exachk for health checks when there are any database-independent issues. Exachk collection of information is very complete, eliminating the tedious steps of manual collection. And after the collection is completed, you

Reference one, explicit cursorExplicit is relative to the implicit cursor, there is a clear statement of the cursor. The declaration of an explicit cursor resembles the following (verbose syntax participates in Plsql ref doc):Cursor cursor_name

Objn:object Name ID Objd:object Data ID OBJD will change depending on the turncate operation of the table Sql> Select Object_id,object_name from user_objects where object_name= ' test_user '; object_id----------object_name-----------------------

    for Oracle databases, db_name and instance_name can be different. Let's take a look at the definition of db_name in an Oracle document:   DB_NAME must be a text string of no more than 8 characters. During database creation, Db_name is recorded

First, flash back technologyTo enable the database to recover quickly from any logical misoperation, Oracle exits the flash back technology. This technology can restore the data of row-level and transaction-level, reduce the time of data recovery,

One, the description database version 11g, single instance ADG. The operating system version is SuSE SP3. ip:192.168.1.11 Repository ip:192.168.1.12 Second, the requirements of the main library needs to modify the IP address, to ensure the normal

Oracle Golden Gate-Concepts and mechanisms (OGG)Golden Gate (OGG) provides real-time capture, transformation, and delivery of transaction data in heterogeneous environments.The heterogeneous environments supported by OGG are:Features of Ogg:Small

First, the application of the environment and demand Operating system is red Hat 6.5 64-bit Mount storage capacity is 2.5T Based on this application environment, there are two issues that need to be addressed: In order to

--First Add PRIMARY KEY constraintALTER TABLE studentAdd constraint Pk_student_sno primary key (SNO)--Delete ConstraintALTER TABLE studentDrop constraint Pk_student_sno--not NULLALTER TABLE studentModify (sname varchar2 (+) NOT NULL)--check CHECK

---restore content starts---1. Download 11g on the Oracle website firstOracle Database 11g 2nd edition (11.2.0.1.0) Standard Edition, Standard Edition 1, and Enterprise Edition, Oracle Database 11g 2nd edition for Microsoft Windows (x64) (11.2.0.1.0

Http://www.itpub.net/thread-1478468-1-1.html Http://tomszrp.itpub.net/post/11835/520574   Since version 11.2.0.1, Oracle has provided a new space allocation method: When you create a non-partition table, this table segment is not created immediately,

1. Internal Connection is simpleSelect a. *, B. * from a, B where a. ID = B. IDSelect a. *, B. * from a inner join B on A. ID = B. IDThe above two statements are completely equivalent. 2. left Outer JoinSelect * from EMP a left join dept D on A.

In general, we only update a single record, but there are few batch updates. Currently, we provide three methods for batch update:   1. Batch update Update test a set a. dept_no = (select B. dept_no from test1 B where a. emp_no = B. emp_no)     2.

Differences between the four statements of Oracle backup recovery and recover Database 11:27:48 | category:Oracle backup recovery | label:| Large font size, medium/small subscription 1 recover database using backup controlfile2 recover

Processing date in Oracle To_date formatDay:Dd number 12Dy abbreviated FriDay spelled out FridayDdspth spelled out, ordinal twelfthMonth:MM number 03Mon abbreviated MARMonth spelled out MarchYear:YY two digits 98Yyyy four digits 1998 The time range