benefits of oracle database

can represent a cross-relationship between data, that is, the horizontal and vertical relationships between data, which is an extension of the hierarchical model. The mesh model can easily represent the various types of connections, but the structure is complex, the algorithm is difficult to standardize 1.2.3 Relationship: The basic data structure in a relational model is a two-dimensional table, without a link pointer like a hierarchy or mesh. The connection between records is achieved by usin

Transferred from:Http://blog.csdn.net/sting0218/article/details/5915308 thanks to the author 1: You must first open the listener. You can use either of the two methods. One is to manually open the listener in the control panel-> Administrative Tools-> service; the second is to run lsnrctr start in DOS to enable it. 2: log on to the database: to log on to the database, you must first log on to the

If you want to restore a database on a colleague's machine to your own machine, the DMP file provided by the colleague cannot be used. I suddenly thought of Oracle 10 Gb, and I was still in the Oracle 9I stage. Back up again with your own 9I client, resulting in a EXP-00003 error. I checked on the Internet that the BLOB field is used in the table (it seems that t

Today, the customer wants to use Oracle 9.2.0.5, which is no longer supported by aix 6.1, so he has to copy the software from other databases and recompile it. However, you can only create a database manually. I haven't used manual database creation for a long time. I simply recorded the database creation process. 1. S

boundaryORA-14075: Partition maintenance operations can only be performed on partitioned indexesOra-14076:drop/splitpartition cannot be applied to local index partitionsORA-14078: You can not delete the highest partition of the global indexORA-14079: Invalid partition option marked as useless indexORA-14080: Unable to split partition by specified upper limitORA-14081: The new partition name must be different from the old partition nameORA-14082: The new partition name must be different from any

I wrote a blog about Oracle Database remote connection: Oracle database -- server-side remote connection configuration. In that article, I recommended someone else's blog, which is the topic of this blog. However, I recently used it, so I went through my blog and found that the blog had been restricted for a long time.

(); if(Rs.next ()) {System.out.println ("User name:" +rs.getstring (1)); } } Catch(SQLException e) {//TODO auto-generated Catch blockE.printstacktrace (); } }}I'm here: querying the user name with ID 1 in the user table, and I'm not going to map it.Two. Linking Oracle databases1.Oracle database is not dedicated to download the driver package, the insta

As we all know, it is not easy to migrate a database from a higher version of Oracle to a lower version of oracle. If you directly use the SQL developer tool, you may not be able to complete the migration successfully (errors may occur more or less in the middle ). Exp and IMP are applicable to Oracle data copy and bac

available RAM and swap space, enter the following command: FreeAutomatic Memory Management Starting with Oracle Database 11g, the Automatic memory Management featurerequires more shared Memory (/DEV/SHM) A nd file descriptors. The size of the sharedmemory must is at least the greater of the Memory_max_target and Memory_targetparameters For each Oracle instance o

Label:Does Oracle GoldenGate support extracting or replicating data from SAP HANA database to SAP HANA database?From:Does Oracle GoldenGate support Replication to/from Sap-hana Database (document ID 1413202.1) Suitable for:Oracle goldengate-version 10.4.0.19 and laterInforma

When the actual oracle value exceeds the specified length of a database field, an error is reported. oracle Length ORA-01438: value larger than specified precision allowed for this column The length of the actual value is greater than the maximum length allowed by a field in the database. A common scenario is the au

Oracle Database Connection + addition, deletion, modification, and query operations tutorial, oracle addition and Deletion Connect to the oracle database and use $ Conn = oci_connect ('account', 'Password', "(DEscriptION = (ADDRESS = (PROTOCOL = TCP) (HOST = ip address conn