pd iloc

It has been two months since the official release of DataUML Design. Due to the recent busy schedule, Version 1.1 has been released only now. In the future, I will continue to improve the DataUML Design software, and hope that the majority of programmers will support it a lot. 　　I. content added and improved in version 1.1 is as follows: 　　　　 Ii. Document generation 1. Open the model file, for example, 6-1. 2. Select the model of the document to be generated and click the generate document

Http://www.jianshu.com/p/423ba6e48aaa First, the installation of PD virtual machine1, parallels Desktop, referred to as PD, is known as the best on the Mac virtual machine, the specific is not to do too much description here. Attached Mac. App folder download, download and put in/applications/folder.After the installation is completed as shown 2, open PD, the

for multiple languages.3. Fill in the configuration informationThe first two options can be filled out according to the project function information, then the TCP/IP server and port are filled in, followed by the MySQL user name, password, and database name.When you are finished, you can click the "Test" button to test if the connection is successfully configured! If successful, you will be prompted for success!If the test is successful, then click on the "OK" button!Third, import the MySQL dat

In PD, the CDM model is created. A digoal has two tables, and the fields cannot be repeated? Tool-model options-model settings remove the unique code under data item There is also a "allow reuse" check box. We recommend that you remove this check box. In the future, don't worry about the problem of field dynamic modification in the model. I just tried it, even if you copy a field from one table to another, the two fields are not modified! We re

Design multiple-to-multiple tables to solve repeated problems Currently, there are two popular design methods: one is to create a separate id Primary Key in the intermediate table, and the key associated with the business table is set to unique; the other is to join the primary key, in this way, the intermediate table does not have a primary key unrelated to the business table, that is, the keys associated with the business table are combined as the primary key. The following are two detailed

Many users just heard that the Apple Computer can be installed on the Windows system, the first reaction is to complete the operation must be particularly difficult, many "small white" users will ask the old user of its operation methods, after the inquiry will find that they do not think so complex. Parallels Desktop This software is now the most users of the Mac virtual machine, through which the Mac installed Windows system or other operating system users can quickly resolve. This virtual ma

Tags: orm's EF+SQLSERVER+PDPIn the GXPT Foundation project, I am responsible for the database has EF and Oom diagram drawing, originally listen to the teacher said Ormapping, know is the entity relationship innuendo, but has not been clear in our project application in the actual use where, this project development joined EF, let me have some superficial understanding of ORM , let's talk about it in fact.So how does PD relate to the creation of a data

SetPDPhysical Model importErwin In the past, when modeling databasesPower Designer (PD)To take into accountPDIt is advantageous for small systems and rapid development and is usedPDDirectly create a physical model (PDM), And you can generate a database creation script for the model. In the current project, the customer is more accustomed to usingCAOfErwin,ErwinIn terms of functionsPDIt is a heavyweight data modeling tool. In this way, the problem ar

%.] Sys.columns Cjoin [%catalog%.] Sys.objects o on (o.object_id = c.object_id)join [%catalog%.] Sys.schemas u on (u.schema_id = o.schema_id)join [%catalog%.] Sys.types T on (t.user_type_id = c.system_type_id)Left outer join[%catalog%.] Sys.identity_columns i on (i.object_id = c.object_id andi.column_id = c.column_id)Left outer join[%catalog%.] Sys.default_constraints D on (d.object_id = c.default_object_id)whereO.type in (' U ', ' S ', ' V ')[and U.name =%.q:owner%][and O.name=%.q:table%]ORDER

when drawing an entity diagram, use PD painting, when I want to convert it into a database form encountered some problems, specifically as follows: ①CDM conversion to PDM can not be successful, the problem shows such as: Workaround:Tools- >model OperationsThe original Barker instead e/r+merise can be. The ② does not have a DBMS, as follows: Workaround:Click on the Yellow folder below to find it in your installation and target Resource File folder, an

This example describes the invocation method for PHP references. Share to everyone for your reference, as follows: Example 1: Example 2: Examples 1 and 2 are the same effect. Example 3: Summary: The reference is returned only

First, we need to do some preparatory work before we start the Mac virtual machine installation WIN10 formally: 1. Download and install Parallels Desktop for Mac on Mac. 2. Prepare Windows 10 mirrored files or DVD discs. Parallels Desktop 11

PowerDesigner version 16.5Reverse generation in PowerDesigner1. Open the PowerDesigner tool, create a PDM file, and select the database type "SqlServer2012" that matches it.Create a new workspace by right-clicking on the

Use the PowerDesigner tool to connect to the database and export data and generate PDM files.1. Establish the connection"Run as administrator" to open PowerDesigner, right-click "Workspace" → "New" → "Physical data Model" to generate empty physical

After the data model is created in powerdesigner and connect to Oracle9i, the created table is displayed in the oralce management tool. However, when you use the SELECT command to query the table, the table name does not exist.You can use the select

How to ImplementNameAndCodeNot automatically equal How to ImplementCDMCreateEntity,NameAndCodeNot automatically matched   SetTools -- gerneralOptions ---> dialog ----> name to code refreshing ing     How to

How to install the Win7 system on a virtual machine: 1. Open parallels Desktop (from the Application folder) and select "File" > "new". 2. If you have a Windows Setup disk, insert a DVD drive. If you have a USB memory with Windows, you can connect

VBScript PowerDesigner 9 's Open and custom Configuration feature. The introduction of Visual Basic scripting has enabled PowerDesigner 9 to have a powerful open feature. With this simple programming language, users can add the required

array ([[3, 4], [6, 7]) After understanding the step slice, the two-dimensional and three-dimensional aspects have the same good understanding, and are not as complicated as the step.You can also copy the sliced elements. >>> B [1:,: 2] = 1 # broadcast assignment >>> barray ([[0, 1, 2], [1, 1, 5], [1, 1, 8]) >>> B [1:,: 2]. shape (2L, 2L) >>> B [1:,: 2] = np. arange (2, 6 ). reshape () # corresponding value >>> barray ([[0, 1, 2], [2, 3, 5], [4, 5, 8]) Similarly, sequence [start1: end1, start2:

series data set to illustrate the indexing function:In [1]: Dates = pd.date_range (' 1/1/2000 ', periods=8) in [2]: df = PD. DataFrame (NP.RANDOM.RANDN (8, 4), index=dates, columns=[' A ', ' B ', ' C ', ' D ']) in [3]: DF out[3]: A B C D 2000-01-01 0.469112 -0.282863-1.509059-1.135632 2000-01-02 1.212112-0.173215 0.119209-1.044236 2000-01-03-0.861849-2.104569-0.494929 1 .071804 2000-01-04 0.721555-0.706771-1.039575 0.271860 2000-01-05-0.424972 0.5670