phenomenon

Difference: 1. CHAR is fixed length, while the VARCHAR2 length can vary, for example, store the string "abc", for CHAR (20), that you stored the characters will account for 20 bytes (including 17 null characters), The same VARCHAR2 (20) only occ

oracle, migration, database design, abc, empty string, backward compatibility, phenomenon, null characters, null values, varchar, space 39, conversion efficiency, complementary relationshipOctober 27

http://www.infoq.com/cn/news/2008/12/restapi-must-be-hypertext-driven Fielding, Ph.D., the essay classic paper (Chinese version) can be described on the World Wide Web is a great tribute to the contribution of architecture. One can imagine that when

chinese version, api, guidance, bowen, coupling, phenomenon, patience, definitions, disappointment, markup, communication protocol, style application, creators, tribute, application state, standard protocol, world wide web, hierarchies, trickery, resource namesOctober 24

Do jpcap capture test today and found my letter of the external address is flying TCP 127.0.0.1:52232 127.0.0.1:1110 ESTABLISHED 5676, this obviously is the agent. After I carefully traced, I found caused by Kaspersky, which should permit before I ob

kaspersky, phenomenon, software applications, external address, network monitoring, port traffic, anti virus software, traffic flow, software settings, traffic monitor, great flow, outgoing network traffic, chomskyOctober 22

EpocCam is a mobile phone camera into a PC camera tools. Support ios, android, symbian platform, pc client software can be downloaded free of charge to its website, mobile phone client software free version and paid version, free version will appear

images, phenomenon, patches, client software, animation, free version, mobile phone, ipad, installation folder, economy, camera tools, watermarks, pc camera, poor image qualityOctober 12

Difference: 1. CHAR is fixed length, while the VARCHAR2 length can vary, for example, store the string "abc", for CHAR (20), that you will account for the characters stored in 20 bytes (including null character 17), The same VARCHAR2 (20) only o

oracle, migration, oracle database, efficiency, database design, abc, empty string, backward compatibility, phenomenon, data types, null character, null values, complement, synonym, string properties, varchar2, saving space, complementary relationshipOctober 9

In the sort of oracle, according to a non-unique sort of location, can not guarantee that each page of data is not repeated with other data also. Because the oracle does not have a stable sorting algorithm, so the first 10 rows and the first 20 rows

oracle, phenomenon, sorting algorithmOctober 8

Newly installed CentOS5.5 system, secureCRT use rz sz upload and download files when the following prompt: [Root @ webslave2 etc] # sz hosts -Bash: sz: command not found [Root @ webslave2 etc] # We can see from the above phenomenon, it may not instal

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We mentioned earlier, when we break down the work for software projects to assess the workload, determine priorities. At the same time, the staffing of the project, that is, who is responsible for needs analysis, which is responsible for the design,

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Original link: http://wlh269.iteye.com/blog/332577 Database transaction isolation level offers four different isolation levels with different types of locks opened to achieve. In the four isolation levels, Serializable the highest level, Read Uncommi

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When you reinstall or uninstall some windows application, it may result in loss of AC1ST.DLL Or simply do not lose, but AutoCAD can not find this file only You see the phenomenon, is that copying the file over to no avail, it may be only the second c

variable name, system variables, double click, avail, variable value, rpm, phenomenon, c program, path name, control panel, backslash, windows application, system environment variables, common files, windows applications, cad, autodeskSeptember 27

With the original windows installation CD, you can download the IIS installation package. 1) 1, no control panel "-> Add / Remove Windows Components -> Internet Information Services (IIS)" to add the component method. (Some GHOST system is

ghost, directory name, installation cd, carriage return, root directory, phenomenon, command line mode, default directory, internal server, system components, control panel, windows installation, empathy, internet information services, d drive, component method, gt internet, windows components, installation option, dl cSeptember 27

A new site to check a list of seo related: 1, may be accessed at the stability and error handling mechanism, usually involving 400 series and 500 series, and 301 redirect content; You can google webmaster tools to do the inspection, you can also use

google, user experience, phenomenon, colleagues, related industries, angles, search engine optimization, webmaster tools, quality content, mainstream media, building construction, back links, reciprocal link, keyword analysis, content quality, socialization, keyword search engines, quality website design, customer link, interactive productSeptember 23

In a customer database, to remove a table space, but was refused phenomenon as follows: drop tablespace gsdata_mid including contents * ERROR at line 1: ORA-00604: error occurred at recursive SQL level 1 ORA-20052: ORA-20052: TableSpace Agent Error!

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hibernate sybase database entities in the use of native or identity primary key generation strategy will be the primary key jump phenomenon. Phenomenon as follows: select * from tablename; 1 2 3 5000000000001 Such problems usually occur sybase databa

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Phenomenon Recently a project manager to chat. The PM is a technology before the big cow, little things that get it working, but things are serious, but also their lives. No reason not to promote this leading cattle. So, let this man when this projec

cow, phenomenon, profits, dow, cattle, phenomena, emotion, team leader, project team member, arbitrary decisionSeptember 21

In the next window xp, cmd, enter, please enter in strict accordance with the format, note grid space! Quote mysqldump-uroot-p databaseName> d: databaseName.sql Enter, You will be prompted to enter the password. You are likely to encounter: Quote ERR

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Project Manager Q: Why do I only work overtime - the burden of phenomena linked to Phenomenon Recently a project manager to chat. The PM is a technology before the big cow, little things that get it working, but things are serious, but also their liv

proj, cow, phenomenon, profits, cattle, phenomena, emotion, team leader, project team member, arbitrary decisionSeptember 16

Please indicate the source reproduced friends, thank you. Recently, there is a problem is the flex linechart disconnection problems. BUG phenomenon is that, before a line is off to a lower value than on. Then LINECHART off on their own, but there is

appearance, line of thought, phenomenon, private function, xu, image problems, figure legendSeptember 13

Phenomenon as follows: the transaction log in database bshare is almost full, your transaction is being suspended until space is made available in the log. Reasons: Log space space shortage. Solution: isql-Usa-P-Sservername 1> dump tran database_name

database name, phenomenon, transaction log, error database, space space, space shortage, bshare, log spaceSeptember 7

ZZ http://apps.hi.baidu.com/share/detail/33178546 I believe many of my friends will turn away from the character encoding, but a garbled problems are endless head, the paper combined with previous experience and Mysql manual explains, with examples o

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iis no response can not start browsing solution summary <! - insert a picture on the contents of the upper right corner --><!-- <div "background: url (images/1.jpg) repeat scroll 0% 0%; float: right ; width: 500px; height: 420px; "&g

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Our game uses mysql as database software, several optimization, has been relatively stable, with stable operation of the records for months, but a relatively recent phenomenon of strange, the database has more than 100 processes suddenly locked, with

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1, define Statistical learning theory proposed a new strategy that is set to function as a function of subset construction sequence, so that each subset of the arrangement according to the size of VC dimension; in every subset of experience to find t

conclusion, relationship, scope, complexity, phenomenon, probability, conclusions, new strategy, construction sequence, higher learning, srm, theoretical description, risk training, statistical learning theory, subset construction, confidence interval, risk minimizationSeptember 1

1. CHAR is fixed length, while the VARCHAR2 length can vary, for example, store the string "abc", for CHAR (20), that you will account for the characters stored in 20 bytes (including null character 17), The same VARCHAR2 (20) only occupies 3 by

oracle, migration, efficiency, database design, abc, empty string, backward compatibility, phenomenon, null character, null values, synonym, string properties, varchar2, saving space, complementary relationshipSeptember 1

XP computer starts normally, but the emergence of the desktop icons to the desktop appears to wait about three minutes, if such a situation, a problem estimated WIA. I often distressed to such problems, often blame the blame on the Rising, the result

double click, emergence, administrative tools, avail, phenomenon, desktop computer, three minutes, few minutes, control panel, mobile phone, reboot, desktop icons, computer management, scanners, fwlink, service windows, taskbar, usb device, image acquisition, management eventAugust 30

Problem: Database (Oracle 9i) the listener starts automatically stopped why? Causes of the error is as follows: I first installed the machine the Oracle database , then for some reason, the machine's host name changed, resulting in inconsistencies be

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Four basic properties (ACID) 1. Atomicity (Atomicity) Operation or transaction contains all or do not do the whole (all or none). (2) consistency (consistency) In the transaction data in a consistent state before the start of the transaction after th

persistence, discovery, t1, phenomenon, input error, wages, transaction isolation, durability, transaction data, isolation level, consistent state, atomicity, database state, database concurrency, concurrent transactions, parallel execution, salary data, x 2000, consistency requirements, transfer moneyAugust 7

Recent projects hibernate3.0 c3po mysql uses a combination of data layers, development and deployment went very smoothly, but every morning to access applications are thrown Could not open Hibernate session for transaction exception, Caused by: com.m

amp, database connection, jdbc mysql, driver lt, parameters, deployment, google, cdata, exceptions, mysql database, access applications, phenomenon, data layers, link failure, communications link, mysql jdbc, preferred method, free linksJuly 8

Phenomenon: php code can not link to the database mysql_connect, and the code behind it have not been implemented. Environment: Fedora12 php, mysql installed via yum Reason: do not understand being Solution: yum install php-mysql

phenomenon, yumJuly 3

log_bin_trust_function_creators error phenomenon: When a local or remote mysql function or procedure to establish error by the trial Times above are log_bin_trust_function_creators is off lead set: set global log_bin_trust_function_creators = 1; but

ini, linux, phenomenon, creators, cnfJuly 1

1. CHAR is fixed length, while the VARCHAR2 length can vary, for example, store the string "abc", for CHAR (20), that you will account for the characters stored in 20 bytes (including null character 17), The same VARCHAR2 (20) only occupies 3 by

oracle, migration, cn, efficiency, database design, abc, empty string, backward compatibility, phenomenon, data types, null character, null values, oracle data, string properties, saving space, complementary relationship, dynasty networkJune 26

First, the authors thank Amoeba such a good tool. Recently, an application using the Amoeba read from several MySQL database tables containing longblob field, always report Session was killed. The investigation is in the read channel Amoeba caused th

public void, public int, log4j, database tables, memory, 3m, exceptions, mysql database, phenomenon, cache size, 1m, int max, report sessionJune 25

oracle query page, encounter data duplication, the following pages teach you a solution to the oracle query data duplication problem, hope you can help. Paging in oracle query, we recognized a similar comparison shown below efficient database paging

lt, data storage, oracle, primary key, test oracle, query data, phenomenon, equality, misunderstanding, data retention, sorting algorithm, storage location, physical location, default sort, encounter data, query sql, rn, second act, effective oracle by designJune 16

The importance of the clustered index and how to select the clustered index In the section on the title, the author wrote is: to achieve a small amount of data and massive data storage process common paging display. This is because the stored procedu

implementation, office automation, phenomenon, algorithm, access database, crux, server index, phenomena, clu, query optimization, critical factor, index structure, massive data storage, 30 million, index selection, sort fieldsJune 1

Keywords: SQLServer query two tables fuzzy duplicate data solutions Suppose I have two tables: Table A Table B Field: a_id number field: b_id number a_name name b_name Name a_class category b_content theme a_tel phone a_address Address Note: Table A

sql statement, two tables, brackets, phenomenon, address address, foreign key, class category, fuzzy query, address note, data solutions, content theme, night breeze, shadows of the night, tel phoneJune 1

In the Oracle-defined variable, often VARCHAR2 (3 Char) or VARCHAR2 (10 Byte) data type, then 3char or 10Byte in the end on behalf of several characters, several characters in it, the last foreign company, one colleague to discuss this issue, what di

sql, column name, oracle, quot quot, colleague, phenomenon, semantics, c1, nls, byte values, chinese character, datatype, database parameters, characterset, oracle representative, added value, character problem, byte data typeMay 30

In the project development process, the database encoding is usually ISO-8859-1, that is latin1, and the project coding is often UTF-8, GBK, GB2312, at this time if not displayed, or the process of inserting data, short operation database during the

lt, import java, amp, java sql, jdbc connection, drivermanager, string url, string str, text html, gb2312, gbk, getconnection, conn, phenomenon, body background, garbage problem, concrete example, int flag, chinese databaseMay 20

Three kinds of string data type is the most used, in database design in the end how to use it? First, let's analyze the three types of data description: 1. char CHAR is fixed length, up to 2000 characters. 2. varchar and varchar2 Certain is that the

alias, oracle, migration, database design, data description, backward compatibility, phenomenon, data types, maximum length, variable string, sql server, synonym, varchar, space 39, string data type, conversion efficiency, oracle varchar2, nvarchar, precise answerMay 11

This article comes from: Linux treasure - http://doc.linuxpk.com/52060.html 1. CHAR is fixed length, while the VARCHAR2 length can vary, for example, store the string "abc", for CHAR (20), that you will account for the characters stored in 20 by

oracle, migration, database design, abc, empty string, backward compatibility, linux, phenomenon, null character, null values, varchar, string properties, space 39, saving space, conversion efficiency, complementary relationshipApril 20

MySQL transaction isolation level in the collection SQL standard with three concurrent transactions must be to avoid the phenomenon is defined between the four levels of transaction isolation. These undesirable phenomena are: Dirty read (dirty reads)

session level, transaction isolation level, databases, phenomenon, global transaction, phenomena, repeatable, transaction isolation levels, concurrent transactions, phantomApril 17

Project encountered a bug, you need to export data from MySQL tables, fields, separated by commas. 1, reproduce Steps: Version 5.1.48 a) Prepare data CREATE TABLE `test` ( `Id` int (11) DEFAULT NULL, `Data` char (10) DEFAULT NULL ) ENGINE = InnoDB DE

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Show you all the fragments present in the database list: select table_schema, table_name, data_free, engine from information_schema.tables where table_schema not in ('information_schema', 'mysql') and data_free> 0; If you find some of the list contai

optimization, phenomenon, application performance, table schema, fragments, debrisApril 13

After n experiments, I finally come up with this half-hour because, according to statistics of the pain, do not write in sql organization of n up. Method One: select round (to_number (to_char (sysdate, 'yyyymmddhh24mi')) / 10) from dual Method Two: s

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A customer database on the 2nd node rac instance automatically dang node, the following analysis First, the phenomenon of review: 2, node failure, alert log shows the following: Thread 2 advanced to log sequence 77740 (LGWR switch) Current log # 24 s

failure, oracle, node, phenomenon, customer database, diag, seq, oracle rac, downtime, pmon, trc, trace files, rd2March 30

In writing the program encountered a problem, check the information to know the difference, be to find a solution. Phenomenon: if sql = "select id +1, age +100 test_age, salary from account", use ResultSetMetaData to getColumnName (1) and getCol

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Environment: WINDOWS 2003 R2 SP2, ORACLE 10.2.0.3.0 Configuration with two physical room and the remote room STANDBY, in which the same room using LGWR transmission, remote transmission using ARCH Phenomenon: the main server system log intermittent n

failure, oracle, orcl, phenomenon, connection error, time out, sequence number, log archive, server system, main library, connection time, metalink, trc, remote transmission, slow network connection, windows 2003 r2, arc4, archive roomMarch 29

Today from sqlserver2005 database into oracle 10g database, began to report jvm heap memory is not enough to modify the maximum memory error, or after. Reported that the network connection is interrupted, you can only lead more than 4,000 pieces of d

oracle, parameters, heap memory, operating system, phenomenon, execution, waiting time, windows system, system solution, maximum memory, regedit, memory error, registry editor, oracle 10g database, oracle error, oracle link, ephemeral portMarch 16

linux mysql hot standby and hot standby win mysql slightly different, at least in the win following soon OK. This example uses the mysql5.1.45 compile and install hot spare change under linux / etc / my.cnf Specific changes are as follows (screenshot

192, transaction rollback, linux, privileges, phenomenon, content areas, server view, server status, server id, database machine, file replication, synchronization services, slave status, slave machine, simultaneous threads, machine library, spare changeMarch 14

Lonely Cheng (116343798) 21:58:13 SQL query table space is very slow Encountered a system table space query the remaining space, the slow velocity anomalies, the following information is 10046, we encountered a similar phenomenon? A bug? AIX: 5.3.0.8

oracle, anomalies, masters, phenomenon, select count, velocity, free space, 15 minutes, table space, query table, space group, misses, recyclebin, fetch 3, master weatherMarch 13

Sybase temporary table space is an important component of the Sybase database, the following details on your Sybase temporary table space tempdb full approach, for your reference. Development of the database server encountered such a problem, use a p

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