Oracle

Download Oracal installation packageEnter https://www.oracle.com/index.html Select-->menu-->downloads and trials-->database-->oracle DatabaseCheck the Accept License agreement.Locate Oracle Database 12c Release 2, select the following file 1 (3.2 GB)

MySQL default port number is: 3306Url:jdbc:mysql://localhost:3306/test?user=root&password=&useunicode=true&characterencoding=gbkDriverName: "Com.mysql.jdbc.Driver";Oracle Default port number is: 1521URL: "Jdbc:oracle:thin: @localhost:

1. IF syntaxIF expression then ... END IF;For example:Set Serverout ondeclare v_name varchar2: = ' &name '; begin if V_name= ' Kiki ' then dbms_output.put_ Line (' login successful '); End if;end;/--------execution results as follows---

A, make sure the network is unblocked, and you can connect to the Internet.B. The Yum Package management tool has been installed.c, switch to directory/etc/yum.repos.d/D. Get the configuration file and modify it accordingly wget

From the 11G onwards, the installation of RAC has become a physical work, but after the completion of RAC installation, how to ensure the stable operation of the system, how to get the performance of the system, this is the stability of the

Oracle Audit CapabilitiesI. INTRODUCTIONAuditing (Audit) is used to monitor database operations performed by users, and audit records can exist in a data dictionary table (known as Audit records: tables stored in the system tablespace SYS.AUD$ ,

ASC and DESCIndicate ascending and descending, respectivelySELECT * FROM tablename ORDER BY id DESC: According to the ID field in descending order, from big to smallSELECT * FROM tablename ORDER by ID ASC: According to the ID field in ascending

1. Get an execution plan for SQL in PL developerEnter the target SQL for which you want to view the execution plan, and then press the shortcut key F5.2.explain Plan CommandExplain plan for + target SQLSELECT * FROM table (Dbms_xplan.display)3. Dbms_

1. Loop 1 to 10w value1 Create or Replace procedureproc_test2 as3 begin4 forIinch 1..1000005 Loop6 ExecuteImmediate7 'INSERT into t values (' ||I|| ')';8 Commit;9 EndLoop;Ten End; One /2. Use variable binding to reduce SQL

Before you start, say one thing: As a DBA, you should prohibit all applications from using Dbms_job.Dbms_scheduler is very complex, and Oracle spends a lot of chapters on two books, two of which are: Oracle? Database PL/SQL Packages and

Used to import and export data with IMP/EXP, now let's get a data pump import and export method. It is better than the imp/exp of the advantages of the way to say---faster!Unfortunately, I exported the data when the error, I wipe, this special is

A primary key (primary key) is one or more fields in a table whose values are used to uniquely identify a record in a table, and in a relationship of two tables, the primary key is used to refer to a specific record in one table from another table,

Windows platform listening service cannot start reporting TNS-12560 TNS-00530 tns-12560tns-00530 case   TNS-12560 & TNS-00530 errors were encountered when the Windows Server 2012 platform started the listening service using commands.   C: \ Users>

In oracle, how does one view the permissions granted to a role ?, Oracle Grant In oracle, how does one view the permissions granted to a role? Select * from dba_role_privs; grant roles to users and other roles Select * from dba_sys_privs; grant

Oracle Database pl SQL study notes, oraclepl 1. define basic variables:2. referenced variable: set serveroutput on declarepename emp. ename % type; psal emp. sal % type; beginselect ename, sal into pename, psal from emp where empno = '000000';

Oracle single-row subquery and multi-row subquery instances 1. the query is divided into primary queries and subqueries; 2. The records returned are divided into single-row subqueries and multi-row subqueries. single-row subqueries use single-row

Oracle starts listening, views listening, and stops listening commands, and oracle listens Start listening: lsnrctl start View listener: lsnrctl status Stop listening: lsnrctl stop 1. oracle data servers include instance processes and

ORA-12162: TNS: net service name is incorrectly specified how to solve the error ?, Ora-12162tns "ORA-12162: TNS: net service name is incorrectly specified" appears today when you log on to sqlplus using an oracle user ". As follows: [oracle@oracle

Oracle date formatting tutorial, oracle date tutorial Oracle date formatting tutorial Select 1 as fld_TM_cartons, TO_CHAR (SYSDATE + 1, 'month/DD/YYYY ') as fld_TMD_order_no, nvl (ps. wmps_grossweight, 0) as grossweight, nvl (ps. wmps_cubic, 0)

How Does oracle set ip addresses to access databases and oracleip addresses to access data? The sky is vast and the sky is vast, and finally the oracle installation is successful, come to access the database, Access failed, what is going on, what is