cwi requirements

(t_name varchar2(3char));(2) Verify the result of the modificationSql> selecttable_name,column_name,data_type,char_used from Dba_tab_columns wheretable_name= ' TAB_T '; TABLE_NAME column_name data_type char_used -------------------- ----------------------- ------------------------- -----------------------------tab_t t_name VARCHAR2 C (3) Insertion of two Chinese characters sql> INSERT into tab_t values (' China ');1 row created. VARCHAR2 (3 char

Requirements for the character set (collation) on the destination database when implementing the logical replication software1. When the destination database is an Oracle database, it is important to ensure that the character set of the destination Oracle database is consistent with the character set of the source Oracle database.2. When the destination database is a MSSQLSERVER database, it is important to ensure that the destination MSSQLSERVER user

Note: Table of Contents"oracle12c Performance Optimization strategy: Introduction Directory Table "Problem description You've just started using the Oracle database and learned a few things about the various table types available. For example, you can spend choices between a heap organization table, an index organization table, and so on. You want to create a database app, and you need to determine the type of table it uses Solution Solutions Working principle: --

This is my own error record for installing oracle11g to Win7:Checking operating system requirements ...Required result: one of the 5.0,5.1,5.2,6.0Actual results: 6.1I changed the 10g,11g from 32bit to 64bit toss several times, finally found a solution to the method ...Did you see that mistake? is actually caused by the configuration fileLocate the Refhost.xml file (location: database/stage/prereq/db, open the Refhost.xml configuration file and locate

Tags: loop solution nic does not have network configuration network nbsp Local connection. exeTip: Configure Microsoft LoopBack Adapter as your system's primary network adapter. Workaround: Add Hardware, Control Panel, (Win7 and then no hardware added, you can enter it in cmd and enter Hdwwiz.exe to turn on adding hardware) I've also connected this hardware, add new hardware devices, Install my manual list select hardware (advanced), network adapter--Vendor: Microsoft Network card: Microsoft Loo

1. How to view the Eclipse version number: 1) Locate the Eclipse installation directory. 2) go to the Readme folder and open readme_eclipse.html. 3) The second line that readme_eclipse.html renders is the number version number, such as: Last revised June 3, 2015 JDK Requirements for version 2.eclipse: Installing Eclipse is relatively easy, but does involve a few steps and software from at least, different sources. Eclipse is a java-based applicati

importantly, to have a certain database tuning capabilities, such as the reasonable creation of the table structure, to correctly create the index, but also through the use of indexes to reasonably optimize database performance, through the execution plan to analyze and optimize SQL.Because the tuning techniques for various data sheets are not necessarily consistent, advanced programmers are better able to master tuning techniques for multiple databases.In the project development process, the r

Build the project environment in the virtual machine today, steal the lazy, directly copy the table in the native database to the database in the virtual machine, then start the project, project one start prompt: SQLyogTable ' sdmqrt. Qrtz_locks ' doesn ' t existI can not find the table, strange Ah, my native database can not be a little table ah, check the virtual machine in the table also does exist. The problem is coincidentally in the Qrtz_locks table, that is, the dispatch task table, Sprin

Tags: usage. com ges tab field SQL Group color name SelectT. Customer Name,sum( Case whenT. Collection type='First' ThenT. AmountElse 0 End as 'First'),sum( Case whenT. Collection type='tail section' ThenT. AmountElse 0 End as 'tail section') from TableTGroup byT. Customer Name This SQL means to query out all the customer collection information and then group by the customer group and then put all the first amount of this customer in a group and then aggregate the first field to make up

Requirements are defined from the user perspective (external behavior of the system) and from the developer perspective (some internal features.The key issue is that you must write the requirement documents. I once witnessed a change of all developers in the middle of a project, and the customer was forced to sit with the new demand analyst. System analysts said: "We want to talk to you about your needs ." The customer's first response was: "I have to

Risk hiding behind the fog of demand The above we see is a customer project manager and the system development team analyst discuss business requirements. All project stakeholders are interested in the requirements analysis phase during project development. The stakeholders referred to here include the project leader and user of the customer, the development analyst and the project manager. This part of the

If the work in the demand analysis stage is attributed to the preparation of the requirement specification, this simplified approach is often the culprit of the problems that may arise in the later stages of the project. We recommend that you use the following steps to form software requirements: obtain user requirements, analyze user requirements, write Requirem

The software architect does not have time to conduct in-depth analysis on all requirements, which is both a strategy and a reality. Demand is any factor that facilitates design decisions, but few developers can have a stable demand set. Therefore, the key first step is to narrow down the scope, the scope criteria are importance, possibility, and quantity. There are several problems in the process of switching from demand to architecture: Complain

If the work in the demand analysis stage is attributed to the preparation of the requirement specification, this simplified approach is often the culprit of the problems that may arise in the later stages of the project. We recommend that you use the following steps to form software requirements: obtain user requirements, analyze user requirements, write Requirem

The meaning of software testing requirementsthe meaning of test requirements　Whether for development or testing, a fully accurate and predictable design is the prerequisite for a successful project. In the actual project operation, it is often felt that the testing process has various problems:1, the product quality dimension is not comprehensive, the test type is not complete;2, the test specification design is more random, the test decomposition dis

Requirement development refers to the process of developing product requirements by analyzing user requirements. Demand development refers to the process of converting user-oriented requirements into those of R D teams, and answering the question "What kind of products do we have to do" from the R D team. Demand development is directly oriented to the R D team

A. Classification of requirementsis to group requirements in a manageable way. Can be divided into the following:(a) original demand (customer demand): The original requirements can be seen as the customer's needs, and the customer is not aware of software development technology, the proposed demand is no way directly for development, output document: Market demand document (requirement DOCUMENT,MRD)(b) Pro

Successful software products are built on the basis of successful requirements, and high-quality requirements come from effective communication and cooperation between users and developers. When a user has a problem that can be solved by a computer system, and the developer starts to help the user solve the problem, the communication starts. Requirement acquisition may be the most difficult, critical, e

Demand change management The demand changes because the demand changes. According to the idea of software engineering, the demand statement generally needs to be demonstrated. After the demand statement is demonstrated, new requirements should be added and supplemented on the basis of the original requirements or the original requirements should be modifi

After reading "Requirements Engineering-software modeling and Analysis," the first three parts, I have a preliminary understanding of software requirements, in the subsequent reading I began the fourth part of the book, the need for documentation and validation, in this and part of the reading I began to understand the requirements of the writing specifications o