Oracle

Generally after the completion of the import oracle.jdbc.driver.*; Statement, you will find an error. This requires: First, add JDBC driver to Classpath Two methods. One is graphical, computer-attribute-Advanced Settings-environment variable-edit

Programmers who are involved in programming may encounter an Oracle URL that is not valid when connecting to Oracle, and the following small compilation teaches Oracle to view the instance name method to help you solve this problem. Oracle View

You can grant Autotrace permissions to everyone in the following ways. If you need to restrict Autotrace permissions, you can change the authorization for public to a specific user's authorization. D:oracleora92>sqlplus/nolog Sql*plus:release 9.2.

Oracle gets all the objects that a package relies on including its child objects A temporary table is used to record the nodes that have been traversed Also uses layers to record the packets that have been traversed Efficiency is general, can

1. Set up Database automatic backup control files, spfile files 2. Every Sunday to do Rman 0-level full-Library backup 3. Daily (excluding Sunday) do Rman 1-level incremental backup 4. Keep a full library backup, incremental backup within one

Oracle databases should be both familiar and unfamiliar to our auditors, familiar with the fact that in computer-assisted audits, it is often necessary to export data from an Oracle database in an audited unit and then import it into your computer's

Oracle UNIQUE constraints, here to share with you, hope to be useful to everyone. If a constraint works only on separate fields, you can define constraints at the field level, or you can define constraints at the table level, but if a constraint

JMYBJS = (DESCRIPTION = (address = (PROTOCOL = TCP) (HOST = 129.1.9.90) (PORT = 1521)) (Connect_data = (SERVER = dedicated) (service_name = JMYBJS) ) ) To create a new folder on D disk: D:backupdmp D:backuplog A log for storing DMP files

Select substr (v$lock.sid,1,4) "Sid", substr (username,1,12) "username", substr (object_name,1,25) "objectname", V$lock.type "LockType", Decode (RTrim (substr (lmode,1,4)), ' 2 ', ' Row-s (SS) ', ' 3 ', ' Row-x (SX) ', ' 4 ', ' Share ', ' 5 ',

Oracle numeric data types can store up to 38 bytes of precision. When the Oracle numeric conversion When you are a common language runtime data type, the number of digits behind the decimal point may be excessive, which can cause this error.

A previous deletion of duplicate records although it's not bad, but when I met the heavy scale, I was too powerless to think of a new method. Thinking 1, keep the record of not duplicate 2. Save a ROWID in a duplicate record 3, delete the

1. Start-> setup-> Control Panel-> admin Tools-> Service Stop all Oracle services. 2, start-> program->oracle-orahome81->oracle installation products->universal Installer uninstall all Oracle products, but Universal Installer itself cannot be

---being executed. Select A.username, A.sid,b.sql_text, B.sql_fulltext From V$session A, V$sqlarea b where a.sql_address = b.address ---executed. Select B.sql_text,b.first_load_time,b.sql_fulltext From V$sqlarea b where b.first_load_time

Oracle stand-alone 10201 upgrate to 10205 1.Shut down the database: For Oracle RAC: $ srvctl Stop database-d db_name For single Instance: Sql> CONNECT SYS as Sysoper Enter Password:sys_password Sql> SHUTDOWN 2. Emctl Stop Dbconsole Lsnrctl

Create a new two table: CREATE TABLE Guotest1 ( Sname VARCHAR2 (10), Gender VARCHAR2 (10) ) CREATE TABLE Guotest2 ( Sname VARCHAR2 (10), Gender VARCHAR2 (10) ) Insert data: INSERT into guotest1 values (' A ', ' m '); INSERT into guotest1

We all know that the index can improve the rate of elimination of the ranking, but the actual use of the situation is often abused, not only waste resources, but also the index has a negative effect. Often people are not aware of such errors,

first, clean up the daily backup of the data table 1, background: the system table space occupancy rate has exceeded 90%. So do a related garbage data to clean up the work. 2, the query needs to clean up the list: Because the day-to-day operation

Many users in a database instance of the Redo01~03.log three redo log deleted, there will be no normal landing database phenomenon, the following example is the specific recovery process, hoping to solve the problem for everyone: One: c:/>sqlplus /

A lot of friends only use the Oracle deletion, but in many cases, he will find the reinstall, point to the next installation of the interface disappeared, often reluctantly had to reload the system, in fact, only your database did not delete clean,

1, installationOracleTransparent gateway for transparent gateways.Install Oracle Select Custom Install, then select Install transparent gateway, then go in to choose the component that installs for SQL Server.2. Modify