Oracle

These two days try to reinstall a Oracle 11g, but there was an error during the installation process, unable to continue next, lest my forgetful brain, or first write down to say, specifically why this error has not found the cause, However, the

when we Order sort of not being able to implement what we want, try it. Nlssort this function.He does not just sort by last name, but also by name: Nls_param is used to specify a language feature in the format nls_sort = Sort , the Nls_sort

Oracle and 2 months ago provided support for EF6. Previously only supported to EF5. EF6 has many useful features that are worth upgrading. Here's how to support OracleI. Oracle provides some basic knowledge about. NET Support.1. In the early days,

OracleBoot auto StartThe database and the Tomcat program need to be started automatically when the server shuts down the rebootOracle Database self-bootingThe Oracle database comes with a self-launching script that can be modified to useVim $ORACLE _

A few days ago to download the Oracle Linux 7.2 version, this practice is done on a 1GB memory, 1CPU virtual machine.Installation interface, red a little glare, select the first item650) this.width=650; "src="

Yesterday's requirements were used in a few previous usages.Key words: To_char (' xxxx '), to_number (' xxx ')The 1.to_char converts 10 binary numbers in Oracle to 16 binary numbers.Pre-recorded 10 binary numberThe Lac_16 field is treated as follows,

Extended table Space Size statement1. Add a data file to the tablespace:Dba_data_filesALTER tablespace UsersADD datafile '/u02/oracle/rbdb1/users03.dbf ' SIZE 10MAutoextend onNEXT 512KMAXSIZE 250M;2. Adjust the size of the data file:ALTER DATABASE

Want to see how many days the system is working? How long did the boot not restart?Windows systemC:\>systeminfo |find "System boot Time"System start-up time: 265 days, 4 hours, 26 minutes, 32 secondsLinux[Email protected] ~]$ uptime17:15:07 up 682

Oracle multi-port multi-Listener Configuration[Oracle @ localhost admin] $ more listener. ora# Listener. ora Network Configuration File:/oracle/app/oracle/product/10.2.0/db_1/network/admin/listener. ora# Generated by Oracle configuration

SQL * LOADER error summary, sqlloader Summary When using SQL * LOADER to load data, there will always be various small problems due to the diversity of flat files and data formats, the following are some errors that may occur during the process of

SQL Like fuzzy query: small knowledge; sqllike fuzzy query Fuzzy query: Where mc like 'value': The returned value is equivalent to where mc = 'value' Where mc like '% value': All data whose matching name is' * value' (ending with "value"), *

Handling Oracle table export failures1. Cause By default, no segment is assigned to the empty table at Oracle11g. Therefore, when you use exp to export the Oracle11g database, the empty table is not exported.2. Processing Method After the

Obtain the first day of the month, the last day, and the first day of the year based on the accounting period. DECLARE V_PERIOD_BEGIN_DATE DATE; V_PERIOD_END_DATE DATE; 1_date; V_PERIOD_NAME VARCHAR2 (20): = '2017-11'; begin select TO_DATE

Cancel data export and importI. Export mode (three modes) and Command Format 1. full database mode exp username/password @ NETWORK SERVICE name full = y file = path \ file name. dmp log = path \ file name. log 2. User Mode (this mode is generally

How to monitor ORACLE index usageDuring database management and maintenance, we always encounter a problem: will the indexes we create be used by some SQL statements? Change the general expression: is the index I created an unused index (unused

Oracle study notes five SQL commands (III): Group by, sorting, connection query, subquery, paging, oracle Study NotesGroup by and HAVING clauses Used to divide information into smaller groups.Each group of rows returns a single result for this group.

Oracle learning notes thirteen triggers, oracle learning notesIntroduction A trigger is a stored procedure that is automatically executed when a specific event occurs. A specific event can be an updated DML statement and DDL statement, and the

Oracle Study Notes 14 built-in package, oracle Study Notes Extended database functions Provide SQL function access for PL/SQL User SYS owns all packages Is a public Synonym Accessible to any user Some built-in packages

Oracle learning notes 2 first knowledge Oracle (2), oracle learning notes first KnowledgeEvery instance of Oracle 9i in Windows is started as a service in Windows. The service is an executable process registered in the Windows registry, which is

Paging query of mainstream Databases1. background summary as a project needs to display a large amount of data on the page, all the data is first queried during database query and then displayed, at this time, paging query operations are essential.