Oracle

4 . Stored procedures and triggers:Example 7-1: (stored procedure) creates a stored procedure that shows the total number of students.SetServeroutput onCreate or Replace procedureStudent_count asP1 Number(3);beginSelect Count(*) intoP1

The Dblink database link is a schema object in a database that allows you to access objects on another database.The Dblink qualifier allows you to reference objects in a database other than the local database, and if Dblink is omitted, Oracle

ToolsutilThe number of records displayed per pagepublic static final int num_per_page=5;/** Java.util.Date Turn Java.sql.Date*/public static Date Utildatetosqldate (Java.util.Date d) {Date date = new Date (D.gettime ());return date;}public static

ALTER session SET nls_date_format= ' Yyyy-mm-dd hh24:mi:ss ';SELECT *From (SELECT A.instance_number,A.SNAP_ID,B.begin_interval_time + 0 Begin_time,B.end_interval_time + 0 End_time,ROUND (Value-lag (VALUE, 1, ' 0 ')Over (ORDER by A.instance_number, a.

1 First modify the/etc/oratab file to add the following line:Ycr:/u01/app/oracle/product/12.1.0/dbhome_1:yAn explanation of the/etc/oratab file is as follows:# This file was used by ORACLE utilities. It's created by root.sh# and updated by either

From Oracle9i after the launch of the default initialization file is SPFile, we can determine whether it is spfile or pfile way to start the database in the following three ways.1. Show Parameter SPFile2. Show Parameter Pfile3. See V$spparameter

Comparison of supported features:Https://www.quora.com/Whats-the-difference-between-Oracle-and-MySQLComparison of Oracle and MySQL in terms of security, data type, storage type.Https://docs.oracle.com/cd/E25259_01/doc.31/e18461/oracle_mysql_compared.

The process of creating an instance of an Oracle database is similar to SQL Server creating a database, one instance of Oracle can correspond to more than one table space, one table space corresponds to one user, and a different table space is

Because of certain requirements, the production environment needs to have both database server and client installed on the same machine because Plsql does not have 64-bit clients. Unable to read the 64-bit database Oci.dll file, so need a 32-bit

This article is a shell script. Primarily for Oracle database backups. By default, it is fully prepared by the evening of Monday. Additional time for cumulative incremental backups.How to use:If the script is saved with the name: oracle_backup.shUse

Oracle Notes (10) constraintsAlthough the table is completed, but the data in the table can not be checked, and if you want to do some filtering for the data in the table, it can be done by the constraints, the main function of the constraint is to

This project is an Oracle small data volume migration process share of the CDC, and the results are not displayed. Migrating data is divided into the following steps: Divided into the following five parts: Source Database Library

1.SQL is divided into 5 major categories:DDL: Data Definition languageDCL: Data Control LanguageDML: Data Manipulation languageDTL: Data Transaction languageDQL: Data Query Language2.DDL (data definition Language): Create,drop,alter,rename toThere

How Oracle 11g completely uninstallsMethod/Step 1:Disable Oracle Services: Enter Computer Management, in the service, find all services at the beginning of Oracle, right-click to select StopMethod/Step 2:In the Start menu, locate Oracle->universal

1. See which objects are lockedSelect S.username, decode (l.type, ' TM ', ' TABLE lock ', ' TX ', ' ROW lock ', NULL) lock_level, O.owner, O.object_name, o.object_type, s.sid, s.serial#, s.terminal,

1.1 Understanding OracleMySQL is a very simple and easy to learn database, its own download the default version of the installation is forbidden to other users access, but as long as the settings can be accessed through IP, you can achieve

--Create a userCreate user xiaoyi identified by root;--Modify the user's passwordAlter user xiaoyi identified by root;--View the table space owned by the userSELECT * from Dba_users t where t.username= ' Xiaoyi ';--Create a table spaceCreate

Database Objects for OracleSeven main objects: users, tables, constraints, sequences, views, synonyms, and indexesKnowledge Point one: Users-user-account, administrator-host of all objects 1. Create user ???? 2.

If you need to access a non-native Oracle database, you first need to install an Oracle client, I install the server version of Oracle directly, and also bring my own client.After the installation is complete, if you access the local server, it can

11G R2 RAC add listen, 11gr2rac listen The procedure is as follows: Check the network number of the default network, in the red font of 1. It will be used to add a listener later:   [grid@rac121 admin]$ srvctl config networkNetwork exists: 1/10.1.252