existence

See the wording on the stored procedure: http://trinea.iteye.com/blog/977141 mysql Chinese reference documentation see: http://dl.iteye.com/topics/download/82db8bb1-7c55-3e74-9f56-de5f8e004ded 0, stored procedures need to pay attention to the best an

lt, int id, variable name, field names, existence, conflict, variable value, select count, database field, dl, string manipulation, arithmetic operationsOctober 25

The INITRANS, chain line, and the efficiency of the data buffer to read my database using Oracle 9i. I have the following questions: 1, INITRANS parameter indicates the database block operation of the affairs of the concurrency level. This parameter

oracle, parameters, oracle 9i, attribute, existence, statistics, data buffer, buffer cache, concurrency level, tabs, using oracle, high speed data, continuous line, pio, database block, sysstat, line database, reading efficiency, sql spool, itransOctober 22

mysql event ---- syntax of the CREATE EVENT (2007-04-08 16:35:47) Reproduced Category: mysql A, EVENT relevant variables and parameters 1, the default start of the EVENT is not supported, can use the following command to view the status: Select @ @ e

parameters, existence, premise, closure, syntax, interval, size medium, mysqld, relevant variables, test table, global event, event scheduler, test eventsOctober 10

findbugs eclipse is an open source code inspection tool; it can be simple and efficient comprehensive way to help us discover the existence of the program code bug, bad smell, and the potential risks. For a variety of issues, it provides a simple and

existence, workload, efficiency, eclipse plugin, extent, mirror, bugs, c program, open source code, good habits, java file, configuration item, c drive, tarball, eclipse gt, bad smell, findbugs, revisions, inspection toolOctober 9

Database design paradigm is needed to meet database design specifications to meet these specifications database is simple, clear structure, at the same time, does not occur insert (insert), delete (delete) and update (update) operation exception. On

database table, relational database management, relational database management system, database management system, attribute, database tables, existence, database design, layman, contrary, design paradigm, key field, information design, database management system dbms, database programmer, functional dependency, math course, teaching math, practical engineering, university teachingOctober 7

In the operation database, sometimes due to improper operation caused by database table is locked, so we always know what to do, I do not know how to unlock the tables in pl / sql Developer tools menu "tools" inside the "sessions" Now

database table, ltrim, existence, sessions, sid, session request, developer tools, pl sql developer, improper operationSeptember 28

SQL statement execution steps of a SQL statement process to go through the following steps. 1 analysis statement parsing the syntax of the specification. 2 Check the statement in the semantic analysis of all database objects related to the existence,

lt, oracle, sql statements, two tables, existence, source data, expression, data search, optimization approach, optimization methods, oracle connection, indexes, search path, semantic analysis, consumption, optimizer, database objects, implementation plan, optimization method, execution stepsSeptember 26

Room with the computer when the installation is the default windows authentication login, and we usually need to use login password to use on the network or remotely by other machines, so the need to use sql server authentication to log in online to

existence, windows operating system, authentication methods, server authentication, connection mode, authentication mechanism, server account, default windows, access sql, windows 98, trusted connectionSeptember 23

Reproduced Competition to determine the rollback of the SQL statement: (Ratio greater than 2, when there is rollback competition, need to add more rollback segments) select rn.name, rs.GETS, rs.WAITS, (rs.WAITS / rs.GETS) * 100 ratio from v $ rollsta

oracle, sql statement, existence, select name, high speed, proportion, pool size, free space, fragmentation, latch, table space, contention, sga, sysstat, space debris, rollback segments, usn, sort field, speed buffer, performance checkSeptember 23

Do need a good Chinese word lexicon, these are basic online collection is not updated, there is no way that only their own entries in the crawl Baike. But Baike in more than 3 million entries, which should all crawl down to extract high-quality entri

apache, lt, sourceforge, existence, discovery, baidu, open category, new entries, chinese word, high quality, word lexicon, quality entries, online thesaurusSeptember 22

First, describe the scene, to do with java server in the case, to obtain the correct header (ie, packet length), I was listening to a more experienced colleague's question, said the case of banks with C may be obtained The length (int or short or lon

lt, existence, different ways, colleague, mechanisms, colleagues, socket communication, java server, receipt, sequence number, banks, computer system, mode two, packet length, correct header, storage mechanism, big endian and little endian, byte number, edian, least significant bitSeptember 21

How to use SQL statements to the database tables to lock and unlock?. Category: 1220 people read the database 2010-03-20 09:29 Comments (0) Add report Database lock is a very important concept, it is mainly used for multi-user environment to ensure d

sql statements, consistency, database tables, existence, inconsistencies, dirty data, database data, multiple users, transaction data, electronic documents, repeatable, hallucinations, firs, staff changes, database integrity, electronic copy, report database, editorial staff, document editorsSeptember 21

/ Etc / passwd, / etc / shadow and / etc / group of the three configuration files for system account management, are text files that can be used to open a text editor such as vim. / Etc / passwd user account information for the store, / etc / shadow

configuration files, group id, quot quot, existence, dozens, home directory, root root, shell, composition, encrypted password, user information, account management, root account, chinese description, information description, root bin, description column, initial group, format strings, group notesSeptember 20

Unsung heroes of the arena - On the Java class within the four scenarios Java is a Java language class within a very important concept, "Java programming ideas," spent a lot of space to talk about the concept. But we rarely used it in practice,

connection pool, database connection, java class, java language, java project, existence, java classes, third party, simulation, scenarios, using java, simplicity, programming ideas, java programming, enterprise java, hero, language class, unsung heroes, reading scene, party databaseSeptember 17

sql where 1 = 1 0 = 1 and the role of where 1 = 1; this condition is always True, in the case of variable number of query, 1 = 1 can be easily standardized statement. First, no where 1 = 1 in a multi-criteria query trouble For example, if you do the

sql query, existence, dynamic structure, assumptions, database record, query options, real world, variable number, description statement, world applications, flexible query, address text, query word, county village, construction problemsSeptember 16

Hesitation project involves analysis of large data import, data each time before going into a database to determine the existence of this data for update and insert , The efficiency is not an ordinary slow - that Oracle9.2 Merge statement after a ver

data source, oracle, match, existence, efficiency, target, syntax, hesitation, m2, cell id, import data, concrete examples, oracle9, country id, bts, gsm antennaSeptember 16

1. Select 1 from ..., sql statement 1 mean? Check out what is the result? select 1 from table; and select anycol (the purpose of collection of any row in the table) from table; and select * from table is from the role of no difference, and see if the

existence, efficiency, table columns, select count, information table, table c, select sum, column values, query conditionsSeptember 13

[COLUMN] to set the table field default values ​​take effect only for the next question: setting the table field's default value if the data will have to adjust the data? Answering such questions is the most effective way to "practice." Design a

conclusion, principle, oracle, default values, null value, existence, doubt, field content, initial data, question and answer, xy, test table, setting the tableSeptember 13

My speaker Chuanzhi podcast. Net employment training class when the teacher during the day to live video recorded lectures for students at night, with a rest day review, the lectures during the day to six hours, so every day to more than one video G,

deployment, existence, concentration, server software, client server, website server, half day, rest day, ftp server, windows server, six hours, download speed, bandwidth resources, screen button, bt client, server usage, tracker server, employment training, seed sourceSeptember 5

Transformers project tour - "Link Test" article Transformers project tour ends quietly, many from the project needs change and confirmation, mockup / demo reviews ... development, testing, and maintenance of the product line up, licking the tast

existence, efficiency, link test, test automation, test system, correctness, concentration, point of view, time one, good time, ups, confirmation, test side, test link, transformers, ups and downs, product quality, web page link, test papers, demo reviewsSeptember 5

index skip scan a basic introduction. Table employees (sex, employee_id, address), a composite index (sex, employee_id). Jump in the index case, we can logically see them as two indexes, one (male, employee_id), one ( female, employee_id). select * f

sql, oracle, existence, object id, good understanding, index case, indexes, employee id, possibilities, composite index, introduction table, wxh, index sex, male employee, female employeeSeptember 5

Have not been able to resolve well the log4j path to log file is saved today just encountered. Be more perfect solution. Let me talk about the scene: A web project, use log4j to do logging system when developing a web container for the jetty, the pro

logs, priority, jetty, tomcat, production environment, listener, relative path, apache log4j, log4j properties, existence, environment variable, presence, project root, root path, perfect solution, path string, init method, a2, logging systemSeptember 1

1 data table structure Table Name Authoring Field authoringId NUMBER PRIMARY KEY, name VARCHAR (50) NOT NULL, startDate Date 2. Page: startDate reverse page order Method 1 SELECT * FROM (SELECT a. *, row_number () OVER (ORDER BY a.STARTDATE DESC) row

lt, principle, oracle, table structure, existence, desc, tmp, structure table, article 6August 30

I. Common mysql command-line command 1 Start service net start mysql MYSQL Stop service net stop mysql MYSQL 2. Netstat-na | findstr 3306 view was listening port, findstr to find the back of the port for the existence of 3. MYSQL landing on the comma

databases, sql statements, attribute, field names, database tables, brackets, existence, operating environment, abbreviations, command line tool, root password, data types, desc, command line command, db name, netstat, findstr, database creation, add data, table syntaxAugust 23

1. WHERE clause using the connect statement in the database language, known as the hidden connection. INNER JOIN ... ... ON clause, resulting connection is called explicit connection. (Other parameters are also dominant JOIN connected) WHERE and INNE

alias, oracle, parameters, two tables, database query, existence, prefix, performance point, query performance, language specification, database language, table aliases, explicit connection, outreach, field constraints, hidden connectionsAugust 20

1. Increase the field alter table docdsp add dspcode char (200) 2 Remove the field ALTER TABLE table_NAME DROP COLUMN column_NAME 3. Modify field types ALTER TABLE table_name ALTER COLUMN column_name new_data_type 4.sp_rename renamed EXEC sp_rename '

key column, column name, type int, grammar, existence, object id, database user, table column, exec, column names, select count, tb, information table, sysobjects, syscolumns, drop column, classified information, obj object, dboAugust 17

Summary of the database exists sql statement sql exists in learning First to compare the following syntax: - Deals = transaction tables, areas = geographical tables, such as Hong Kong; Our goal: to view a regional trading select * from areas where id

column name, database sql, sql statement, existence, efficiency, expression, target, execution, syntax, word table, true value, hong kong, summary database, select city, eligible city, regional tradingAugust 11

Today weblogic10.33 configure db2 9.7 data source, using type4 connected, drive select weblogic db2 type4 drive, the configuration is successful, open application test and found that the existence of meta-data access issues, such as through select *

data access, column name, data source, existence, driver configuration, table column, halo, configuration problem, meta data, ibm db2, type3, domain directory, db2 data, application test, open application, db2 driver, source driver, tb1, connected driveAugust 5

Add to delete SQL statements used to modify the field 1. Increase the field alter table docdsp add dspcode char (200) 2 Remove the field ALTER TABLE table_NAME DROP COLUMN column_NAME 3. Modify field types ALTER TABLE table_name ALTER COLUMN column_n

key column, column name, table structure, type int, sql statements, grammar, existence, object id, database user, table column, exec, column names, select count, tb, sysobjects, syscolumns, drop column, obj objectJuly 6

Look at the following example: oracle in two system tables. Emp, dept. example: 1: not exists (not in) not exists: This statement returns the select * from scott.dept d where e.deptno = d.deptno and d.deptno = 10 conditions are met, the result set, i

oracle, sql statement, existence, emp, system tables, 7788, fordJune 29

This article is from csdn (http://blog.csdn.net/yanshouke/archive/2008/12/18/3547518.aspx) An iron law: There is no free lunch, use index is a price to pay. Index obvious advantages, however, but few people cared about the index used to pay costs. If

inquiries, existence, database design, design database, indexes, consumption, server resources, iron law, information sheet, critical point, physical space, iron rule, database administrator, price index, place of birth, database administrators, there is no free lunch, index maintenance, price databaseJune 21

I. Common mysql command-line command 1 Start service net start mysql MYSQL Stop service net stop mysql MYSQL 2. Netstat-na | findstr 3306 view was listening port, findstr to find the back of the port for the existence of 3. MYSQL landing on the comma

sql statements, sql statement, attribute, field names, database tables, brackets, existence, instances, abbreviations, command line tool, root password, data types, desc, db name, netstat, statement 1, findstr, database creation, add data, table syntaxJune 15

db block gets: current mode, regardless of whether the data in this block may exist before image, that regardless of the existence rollback data can be rolled back, only to see the most current data block, even if someone else is being updated, but a

map, oracle, consistency, existence, images, circumstances, query data, point in time, query mode, expectation, good word, rollback segments, dml, rollback segment, plan execution, transaction updates, execution statisticsJune 12

Speaking of soft parsing (soft prase) and hard parsing (hard prase), it can not be said about Oracle's sql processing. When you issue a sql statement delivered Oracle, and get the result in the implementation, Oracle sql this will be a few steps of t

oracle, sql statement, oracle sql, grammar, existence, assumptions, hash algorithm, design staff, hash value, bind variables, spy, sql syntax, implementation plan, usi, spelling, execution plan, internal algorithm, plan execution, parse tree, praseJune 11

sql mass action: where 1 = 1; this condition is always True, in the case of variable number of query, 1 = 1 can be easily standardized statement. First, no where 1 = 1 in a multi-criteria query trouble For example, if you do the query page, and can h

oracle, dynamic query, oracle sql, existence, assumptions, database record, query options, real world, mass action, variable number, sql queries, description statement, world applications, flexible query, footprint, address text, query word, query construction, construction problems, construction codeJune 9

Database transaction machine in front of the two blog, I wrote a bit about database locks in some of the content, and transaction locks are actually closely linked, that a transaction in the database is very important, but also more complex and imple

database products, consistency, google, existence, database transaction, occurrence, interference, locks, probability, isolation, consistent state, revocation, transaction properties, second choice, concurrent transactions, acid properties, atomic transactions, programming content, transaction mechanism, transaction machineJune 7

Model checking in the Existence of reference problem in the tool-> check model Select which option tab, then select the table, the next thing you start to understand Not duplicate the name, but by default you must create an index for each table / ass

scripts, attribute, existence, double click, constraint, script file, hook, 8 bits, 163 com, msn, model gt, foreign key, category id, key field, design models, header comments, cdm, title option, u8, u7June 4

in, not in, exists and not exists a difference: the difference between in and exists: exists: there are generally behind the sub-query, when the number of rows returned by the subquery, exists returns true. select * from class where exists (select'x"

implementation, query time, brackets, existence, efficiency, query result, execution, result sets, query results, stu, operation mode, external reference, external query, girls and boys, correlated subqueryMay 29

Usually a software corresponds to a separate storage space, so data stored between multiple software will not affect each other. In SQLServer, usually with the "create database database name" to create a database. However, in Oracle, a server us

data storage, quot, oracle, database name, existence, oracle database, memory, sqlserver, three steps, storage space, database database, default table, table space, uniform size, import database, independent data, space description, management dictionaryMay 26

[, Str]: represents optional. 1: decode Usage: decode (value, search_value, result, defaultValue) Three similar projects in JAVA expression value == search_value? Result: defaultValue; 2: translate Usage: translate (x, exist_string, to_string) Exampl

oracle, existence, expression, key words, search query, employee id, query returns, pseudo, aggregate function, oracle application, student group, case case, query retrieves, distinct rows, tree hierarchy, fifth character, dual outputMay 20

Prior to the dba and sysdba always lumped together today to see the difference in the discussion forum, special records are as follows: SYSDBA is not a privilege, when the user logged in with SYSDBA database, users will log into SYS. Log in as sysdba

oracle, existence, privilege, database users, login authentication, discussion forum, recovery operations, oracle dba, oracle instance, database recoveryMay 18

1. Nomount state to start the database parameter file reading process, the application parameter to start the instance. View the location of the database parameter file: show parameter spfile SQL> show parameter pfile; NAME TYPE VALUE ------------- -

oracle, parameters, existence, oracle product, select name, password file, information show, checkpoint, c oracle, parameter control, integrity checks, datafile name, control pathMay 6

Data file does not create success alter database datafile'......' offline drop Then manually delete the data file but that there may be hidden Before we detail, we must more clearly: Oracle does not provide, such as deleting tables, views the same wa

logs, oracle, existence, circumstances, oracle product, execution, select count, system solution, drop tablespace, table space, datafiles, noarchivelog modeApril 29

Problem: Unable to get in touch with the agent. Verify that the proxy url is null After installation is complete, use your browser to log on to Enterprise Manager (http:// machine name: 1158/em /), log in using SYS user name is always prompt (state:

configuration database, oracle, oracle home, existence, double click, database user, operating system, software installation, pop up window, system administrator, target database, login user, authentication services, proxy url, enterprise manager, oracle software, oracle user, database solution, service options, agent verify thatApril 23

Overview of the SCN number SCN is updated when the Oracle database, maintained by the DBMS automatically increments to a cumulative figure. Oracle database, a total of four kinds of SCN were System checkpoint SCN: system checkpoint SCN in the control

oracle, existence, oracle database, query data, global scope, dbms, table space, query system, tablespaces, increments, scn filesApril 20

SQL join query that we often used, including multi-table join queries into SQL: inner join, outer join, cross-connect, the following details on your knowledge of SQL join query for your reference. In connection with a column based on a common table t

two tables, existence, student id, constraint, money, relationships, queries, sid, scoreApril 19

Colleagues conclude the PD Caution, record it. Create table script generated by the pdm when the field exceeds 15 characters on the error (oracle) The solution is to open the PDM, Database menu bar will appear, enter the Database - Edit Current DBMS-

quot, oracle, naming convention, existence, mistake, provisions, colleagues, double quotes, caution, script objects, case sensitivity, menu bar, pdm, table script, index test, model options, case option, database menu, case options, open cdmApril 17

• Introduction In any computer language (C, JAVA, pascal) has a variety of control statements (conditional statements, looping structures, sequence control structure) in pl / sql in the existence of such control structures. 1>: Using a variety of if

existence, conditional statements, computer language, control structure, control structures, pl sql, control statements, pascal, conditional branch, sequence control, employee wages, null statementsApril 17

Fast refresh materialized view multi-table joins together June 22nd, 2007 | Categories: Boring | Tags: Leave a comment | Trackback Only article thanks YangTingKun students:) A materialized view problems to find him. Cause is the connected clustered S

logs, amp, class id, oracle, attribute, existence, response time, rewrite, select count, realization, rowid, big cat, new values, relevant table, frequent needApril 16

A remote access solution to mysql error Tags: MySQL , remote access Today in the configuration of a server, how Rom this server mysql. Telnet normal in this machine to access your mysql properly. Error SQL Error (2003): Can't connect to MySQL server

quot, localhost, databases, bind, default installation, existence, ubuntu, operating system, server mysql, access permissions, ip access, ip address, cnf, remote access solution, remote login, native access, access mysql, database license, address password, client privilegeApril 16