Oracle

Find problems I used the oracle11g, when I knocked down the following command, let me dumbfounded. Alter system set sga_max_size=960m Scope=spfile; Shutdown immediate Startup At this time the startup error is: sql> startup Ora-0

I will not say what happened, direct focus: Computer-> Properties-> advanced system Settings-> advanced-> environment variables 1 in the "system variable" edit path, select all of them to copy the path all out into the text document; 2 Create a

This article mainly describes the Oracle in the simple query and limited query, the following words not to say, come and see together. Sql: 1,DML (Data Manipulation language): mainly refers to the database query and update operation, query

ORA-54013: INSERT operation is not allowed on virtual columns This is a new feature of Oracle 11-Virtual columns. In previous Oracle versions, when we needed to use expressions or some calculation formulas, we created a database view, and if we

Objective This article gives you a major introduction to the method of creating a self-growing table in Oracle, which uses a sequence. Here's a few words, let's look at the sample code. Sample code CREATE TABLE Tb_student ( ID number

Conditions for inserting a view: 1. If the view is based on a base table, then this is called a connectionless view, and all of the disconnected views are updatable, that is, you can do it on the view, Insert,update,delete the operation. 2. If you

For the use of Oracle databases, it is important to create a table that meets your needs, so let's create the first table of our own There are two ways to create a table: (1) More needs to be created inside CMD (2) created in SQL Developer, and

Oracle is one of the most popular databases, powerful, excellent performance, relative to the difficulty of learning is not small. This article is to share some of their experience to everyone, to do a accumulation, to facilitate their own and other

Query for duplicate data in an Oracle database: SELECT * FROM Employee GROUP BY Emp_name has count (*) >1; Duplicate data that Oracle queries can delete Select t1.* from Employee T1 where (t1.emp_name) in (SELECT t2.emp_name from Employee T2

How do you manage Oracle databases for a novice Oracle database? First of all, from the simplest startup and shutdown database, the following is a brief introduction to the sequence of starting and closing Oracle databases. First, the Oralce start

I. Configuring System Parameters We need to configure the system parameters to be used before Oracle is installed 1. Modify System kernel Parameters modifying sysctl.conf files Add the following in the file/etc/sysctl.conf: Kernel.sem = 250 3200

The example in this article describes the solution for Oracle to appear beyond the maximum number of open cursors. Share to everyone for your reference, specific as follows: Java code in the execution of Conn.createstatement () and

This article is a summary of all the previous articles on analytic functions: I. Statistical ASPECTS: Copy Code code as follows: Sum () over ([Partition by] [order by]) Sum () over ([Partition by] [ORDER BY] Rows Between

Introduction of Window Function: So far, the analytic functions we've learned are particularly useful for calculating/counting data over time, but what if the calculation/statistics needs to be done with every record of the recordset? For some

Introduction to Oracle Analysis functions: In the day-to-day production environment, we have more contact with the OLTP system (ie, online Transaction Process), these systems are characterized by real-time requirements, or at least the length of

Arranges (rank ()) functions. These permutation functions provide the ability to define a set (using the PARTITION clause), and then arrange the elements in the collection according to some sort of order, and the following is an example of the Scott

Some Oracle processes are killed, the state is set to "killed", but the locked resources are not released for a long time, sometimes there is no way, had to restart the database. Now provides a way to solve this problem, which cannot be killed in

The Oracle tutorial you are looking at is Oracle performance optimization. Increasing the SGA already buffered appears to be less significant for performance, with only a 1.73% increase in loading time. Below we increase the size of the SGA redo log:

The Oracle tutorial you are looking at is: Oracle Application Experience (2). ------who is accessing the database? Select C.sid, C.serial#,c.username,a.object_id,b.object_name, C.program,c.status,d.name,c.osuser From V$locked_object A, All_objects B,

The Oracle tutorial you are looking at is: Oracle initialization parameter settings. ALTER DATABASE datafile ' D:ORANTDATABASEUSER1ORCL. ORA ' RESIZE 1000M; CREATE tablespace index_data datafile ' d:orantdatabaseindex_data ' SIZE 500M; ALTER