Oracle basic concepts and comparison with informix
I. ConceptsUser: informix directly uses the user management system of the operating system. Generally, root and informix are used as super operators to manage other users. Oracle has its own user
The racle database system is a complex software system. Without understanding its internal structure principles and relationships, it is impossible to design and Compile High-Quality application software systems or manage a complex application
describe how securefiles improves the performance of large object (LOB) data types? Access the securefiles using SQL and PL + + APIs
Manage Corporate Information
Organizations need to manage many types of data efficiently and securely:?
OracleHow to Create a databaseDATABASE LINKWhat about it? In this article, we will use an instance to introduce the creation process. Next, let's take a look at this process.
Multiple ORACLE databases physically stored in the network can be
First, synonym synonymConnect sys/123 as SYSDBA;SELECT * from EMP;ORA-00942: Table or view does not existCreate synonym emp for scott.emp;SELECT * from EMP;1. DefinitionA synonym is an alias for a pattern object.Can be a table or view, sequence,
Common exceptions:ORA-14025: Cannot specify partition for a solid view or a solid view logOra-14026:partition and cluster clauses repel each otherORA-14027: Only one partition clause can be specifiedORA-14028: Missing at or values
Database Link of IT Ninja Turtles: database of Ninja Turtles
-CREATE public database link test_link connect to scott identified by tiger using '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (HOST = 127.0.0.1) (PORT = 1521) (CONNECT_DATA
I. Oracle connection method:
Starting with a user request,What is the complete working mechanism of Oracle? First, a user process sends a connection request, if the host name or host name hit by the local service is used ), the request will be
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