Oracle

1. Transaction: A logical unit consisting of a set of commands that ensures that all operations either succeed or all fail.End of transaction: 1) Explicit commit (Commit) 2) explicit rollback (rollback) 3) DDL statement Stealth commit 4) normal End

Set pagesize 150;Col instart_fmt format A30Col inst_name format A20Col db_name format A20Col snap_id for 999999999999Col snapdat format A30Col lvl for 999999999999Select To_char (s.startup_time, ' dd Mon ' at "HH24:mi:ss ') instart_fmt,

The last time you used JDBC to connect to an Oracle database, you reported a SID-related error. Unable to connect to SID. The workaround is to use the format of the following method to connectFormat

Because of the need for work or exposure to many Oracle versions under Windows, this time a general summary of the database upgrade is made: Windows Oracle11.2.0.1 upgrade to Oracle11.2.0.4.But the vast majority of online programs are not used here:

1, first install Plsql client, Chinese, registration;2, download Oracle Client:instantclient-basic-nt-11.2.0.2.0.zip;3. Configuring the Plsql-tool-Connection Configuration Oracle home directory name path and OCI library path4. Configure oracle_home

SQL Server data Types Oracle data Types bigint Number (19,0) Binary (1-2000) RAW (1-2000) Binary (2001-8000) Blob Bit Number (1) char (1-2000)

Cross-Version upgrade (10.2.0.5 upgrade to 11.2.0.3)10.2.0.5 version: Oracle_base:/oracle/u01/app/oracleOracle_home:/oracle/u01/app/oracle/product/10.2/db_111.2.0.3 version:

In the recent work to use stored procedures and functions, simply take PL/SQL as a whole to look at. I've seen the basic books and the blog posts in the garden, and I'll summarize what we've learned here.First, the basic statement1. Case2,

Transferred from: http://lorry1113.javaeye.com/blog/513851Keywords: Oracle stored procedures1. Basic structure CREATE OR REPLACE PROCEDURE stored procedure name (parameter 1 in number, parameter 2 in number) is variable 1 INTEGER: = 0; Variable 2

Format one: Use ServiceName mode:Jdbc:oracle:thin:@//:/Example Jdbc:oracle:thin:@//xxx.xxx.xxx.xxx:1526/cdevAfter @ there is//, which is the main difference from using SIDS. (11g does not add after @//OK)This format is the recommended format for

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

Environment: Simulating the creation of the main library use the Install option in the DBCA Start graphical interface option---> select Create and configure a databaseCreate a mock-up library using the Install option in the DBCA Startup graphical

All the field information (method) of the record whose minimum time is obtained by grouping in Oracle Database, and the oracle Field Merge into user_member_info USING (select min (UP. created) as cre, min (up. shop_no) as shop_no, up. memberid as

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

Detailed steps for installing oracle xe in centos, centos 1. Download the installation package Go to the official website and find the corresponding version. 2. Upload to ECs Here, I use WinSCP. the upload speed is based on the network speed. You

Oracle paging query tutorial and oracle paging tutorial SELECT * FROM (select rownum as rowno, t .* FROM table t where rownum (page-1) * size; Page with order by statement: SELECT * FROM (select rownum as rowno, r .* FROM (SELECT * FROM

Explain the stored procedures of Oracle and PLSQL.1. Create a stored procedure in plsql Open plsql, right-click procedures, and create. If the creation is unresponsive Direct file-New-program window-blank, create a program windowStored Procedure

Tips for using Oracle Database varchar2, oraclevarchar2The maximum varchar2 length of Oracle, Encoding Problems Varchar2 type: Set the Oracle field length to varchar2 (4000 ), 1. When the character set of the database is set to gb2312, a Chinese

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