Oracle

Call oracle stored procedures and functions -- create or replace procedure pro_add (num1 number, num2 number, r out number) asbeginr: = num1 + num2; end; www.2cto.com create or replace procedure pro_minus (num1 number, num2 number, r out number)

Create sequence seq_newsIdincrement by 1 start with 1 maxvalue 999999999; select seq_newsid.nextval from sys. dual; Delete sqldrop sequence seq_newsId; www.2cto.com =============================== the sequence used in oracle development is a

Decompress the 10__database_win32.zip \ database.zip package of oracle 10g. decompress the package and complete the prerequisites for Oracle Installation. Then, you do not know why a memory error is reported. Then I checked all kinds of information.

Oracle databases can be archived in two different ways: NOARCHIVELOG (invalid media recovery) or ARCHIVELOG (effective media recovery ). Database backup and recovery ( http://www.dnew168.com/thread-1708-1-1.html Policy has an important impact.

Based on PL/SQL, a pl/SQL block consists of up to four different parts. Only one part is required. block: only named blocks are available, that is, the named functions, stored procedures, and other block names. declaration part: defines variables,

Definition of basic oracle backup and restoration knowledge literacy backup. The fundamental purpose of backup is to restore. If needed, it can be recovered, that is, backup. For example, archive log file is a backup of online redo log file. The

Differences between the oracle (8) view and table. the table needs to occupy disk space, and the view does not need B. view cannot add index c. you can use the view to create complex queries, for example, Student Course Selection System d. view

The query results of the oracle tree data structure are displayed with a database table structure design: www.2cto.com create table DEPT (id number (9) primary key, -- department IDNAME VARCHAR2 (100 ), -- department name PARENT_ID NUMBER (9) --

How can I create a foreign key constraint in Oracle using a non-default method? If the Oracle default creation method is used, the referenced data cannot be deleted, this gives us more flexible options in Oracle9i, however, we use the on delete

There is no backup in the Archiving mode of the rman experiment. Recovery of lost data files after normal shutdown does not allow direct recovery of lost data files, such as system. Not all data files need to be recovered, for example, temp

Oracle Database new installation connection string problem cutover newly installed database, Client Login no problem, apache/cgi-bin program problems, sqlnet. the log is as follows: Fatal NI connect error 12170. version information: www.2cto.com TNS

Oralce common SQL functions (5) before using aggregate functions, we need to first understand the concept of "grouping". One of the problems we encounter in our work is grouping the retrieved data.The syntax structure of grouping is very simple,

1. Use top SQL to find the problematic SQL statement select * from (select * from v $ sqlstats order by DISK_READS desc) where rownum 'jsonbi', TabName => 'product', Estimate_Percent => 0, Method_Opt => 'for all indexed columns size 1', Degree => 4,

How can I ensure that the system can be restored to the last submitted state by importing and exporting the physical backup of the Oracle database, it must be based on physical backup, and archive logs and redo logs accumulated since the last

Oracle Stored Procedure paging processing knowledge point link 1. oracle Paging2. Use cursor to create a stored procedure [SQL] -- create a stored procedure (startpoint start point, number of getnum retrieved) create or replace procedure copylimit

PLSQL is often used as the Oracle client to configure login user information. It may be cumbersome to manually enter the user name, password, database name, and other information without configuration. In fact, we only need to set it in the PLSQL

Environment for successful oracle Command Execution test: windows XP + oracle 10g, windows 2008 R2 + 11g code is as follows: www.2cto.com SQL code create or replace and compile Java Source named "OSCommand" as -- java: OS COMMAND import java. io. *;

ExercisePaperDAOImpl // query the training memory questionsPublic List findTTMemory (int userid, int ttid, int ttgid) {String SQL = "select * from tbTTrainMemory where userid =? And ttid =? And ttgid =? Order by dbms_random.value "; Object [] args =

Create table Java code create table blobdata (www.2cto.com OID decimal (22) primary key not null, DATA blob ); create directory and process Java code CREATE or replace directory doc_loc as '/tmp'; create or replace procedure Load_BLOB_From_File

Oracle note (2) the SQLPlus command mainly uses the command line method for Oracle database operations, and all commands are completed using sqlplus. There are two forms of sqlplus. One is dos-style sqlplus: sqlplus.exe; the other is windows-style