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Database--The method of transforming from ER diagram to relational mapping

database--the method of transforming from ER diagram to relational mapping Specific steps: 1.For each strong entity type E. Create a new table. Include as its columns, all the simple attributes and easy components of the composite attributes of E. Identify the PRI Mary Key and the alternate keys. Do not include any multi-valued attribute as a key. If The unique field of an entity is a multi-valued attribut

9. PD reverse engineering-from database to model (ER diagram)

%.] 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

How does Visio reverse connect to DB2 to generate a E-R Diagram

Take IBMDB2For example,VisioReverse join DB2 generationE-R DiagramThe process is as follows: 1. Create an ODBC Data Source Open Control Panel> Administrative Tools> data source (ODBC) to open the ODBC data source Manager. Select system DSN to add a system data source. Select IBM DB2 odbc druver as the data source driver-> click "finish" and enter the data source name "TEST", database alias "test" (the DB2 database to be connected ), description "TESTDES", click "OK" to return to the ODBC data

Connect to a database using PowerDesigner and generate an ER diagram

Images cannot be copied directly. You can fill it up later. 1. Open PowerDesigner, select File | Reverse Engineer | Database ..... in the new Physical Data Model dialog box, select the type of database you want to connect to, and click OK. 2. In the Database Reverse Engineering window, select the Using a data source option. Click the database icon at the far right of the next line to eject the connect to a Data source window. Select the first item: ODBC machine data source. Click t

Visio draw UML Use case diagram does not have a workaround for the include relationship

When you use Microsoft Visio to draw a use case diagram today, you find that the include relationship is not found in the Visio UML use case, which is the "arrow" + "Finally, a workable solution was found:First: Open the UML Model diagram, software and database, Microsoft visio

Navicat Premium Quick Export Database ER diagram and data dictionary

digits ( case when a.isnullable=1Then'√'ELSE"'END) allow null, ISNULL (E.text,"') Default value, ISNULL (G.[value],"'As field description from syscolumns a left JOIN systypes b on A.xtype=b.xusertype INNER JOIN sysobjects D on a.id=D.id and D.xtype='U'and D.name'dtproperties'Left JOIN syscomments e on A.cdefault=E.id left JOIN sys.extended_properties g on a.ID=g.major_id and A.colid=g.major_id ORDER by a.id, A.colorder Next, export the data dictionary: First, click Export in the top right co

PowerDesigner Database Modeling--conceptual model--er diagram

the direction of the link, generally with a verb or a dynamic table.For example, the "Students to subject" group box should be filled in with "owning", and "belong" in the "Lessons to student" group box. (Here is just an example, maybe some words are not very reasonable).Vii. Mandatory definition of linkagesMandatory the mandatory relationship between the form and this direction. Select this check box to create a vertical line of contact lines on the contact line. Not selecting this check box i

10. Data model (ER diagram) into SQL script, require the exported fields to be uppercase

1. Enter Tools-->execute commands-->edit/run script, execute the following scripts to achieve all the fields to capitalize;Option ExplicitValidationmode = TrueInteractivemode = Im_batchDim MDL ' current model' Get current modelSet mdl = ActivemodelIf (MDL is Nothing) thenMsgBox "Not open a model"ElseIf not MDL. IsKindOf (Pdpdm.cls_model) ThenMsgBox "The current model is not a PDM"Else' Call handlerProcessFolder MDLEnd If' handler calledPrivate Sub ProcessFolder (folder)Dim Tab ' table to be proc

Draw a E-R diagram in Visio

Entity Relationship diagrams is the most common tool in conceptual structure design. With Visio you can easily draw a E-R diagram. In the "Basic flowchart shape" ("file"-> "shape"-> "flowchart"-> "Basic flowchart shape") that comes with Visio, there are rectangles (the label is "process"), Diamond (the label is "judgment"), and elliptical (the label is "Terminat

How do I draw a diagram using Visio?

Microsoft Visio2007 provides us with a lot of templates and countless shapes, some of which seem simpler, but others are relatively complex and not easy to get from. This article is mainly about how to create a basic block diagram with Visio2007 so you can get started quickly, by explaining some basic tips on how to open a template, put shapes into a drawing, and connect those shapes. The following steps are specific: Start Visio2007. When

Beautiful Visio "architecture diagram", "Data flow graph", "data compression mechanism", to meet the leadership of the dedicated

N long ago, the Visio diagram was drawn in order to demonstrate architectural design to the leader. If you want to go, only the figure can be better performance. And his own writing is not good. Download address: http://download.csdn.net/detail/gzy11/9735880 csdn download not reliable, do not integrate the people now more points to so many, who is nothing old to the whole point ah. To the source can directl

Silver-like Web Visio node-wired controls essential diagram free download address

Essential Diagram for Silverlight is a powerful graphical topology control that provides the ability for users to interactively create and edit plots, support data binding and multiple layouts, export to multiple file formats, and more, in XAML support. Specific features: Support for setting graphical appearances and styles Decorator shapes support arrows, circles, diamonds Connecting lines support orthogonal lines, Bezier curves, s

Silver-like Web Visio node-wired controls essential diagram free download address

:500px;height:400px; "/>Essential Diagram for Silverlight is a powerful graphical topology control that provides the ability for users to interactively create and edit plots, support data binding and multiple layouts, export to multiple file formats, and more, in XAML support.650) this.width=650; "src=" Http://twaver.com.cn/Uploads/Product/2810/1.png "style=" border:0px; "/>Specific features: Support for setting graphical appearances and styl

Silver-like Web Visio node-wired controls essential diagram free download address

Essential Diagram for Silverlight is a powerful graphical topology control that provides the ability for users to interactively create and edit plots, support data binding and multiple layouts, export to multiple file formats, and more, in XAML support.Specific features: Support for setting graphical appearances and styles Decorator shapes support arrows, circles, diamonds Connecting lines support orthogonal lines, Bezier curves, straight

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