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STARUML ER DIAGRAM ADD AUTOINCREMENT HOW TO
STARUML ER DIAGRAM ADD AUTOINCREMENT CODE

When inline editing, you can type + before the column name to indicate that the column is a primary key column.Īlternatively, right click on a column and select Include in Primary Key to set the column as primary key or include it as part of a composite key. There are several ways you can take to specify a column as a primary key. Note that the definition will also be effective in database and DDL exporting. The User type field is only available when the DBMS selected in database configuration supports the definition of user type.

Enter the definition statement in the User type field, in pattern SET('a','b','c'.

Select varchar to be the Type of column.

Right click on the column and select Open Specification.

In Visual Paradigm you can model a set type with the steps below: SET columns in MySQL allows the definition of columns that can contain a given set of values. When finished editing, press Esc to confirm.

Now, you can repeat step 2 and 3 to add more columns.

Enter its name in the pattern COL_NAME : COL_TYPE where COL_TYPE is the data type of column.

Right click ont he entity and select New Column from the popup menu.

To draw an entity, select from the diagram toolbar and then click on the diagram. And note that only entities in physical model will be included in generating database/DDL. All entities created in this diagram will be set to the chosen data model. At the top right corner of the diagram, select the Data Model.

This creates an Entity Relationship Diagram.

The Location field enables you to select a model to store the diagram.

Enter the diagram name and description.

In the New Diagram window, select Entity Relationship Diagram.

Select Diagram > New from the application toolbar.

STARUML ER DIAGRAM ADD AUTOINCREMENT HOW TO

In this page you will learn how to draw entity, how to add column and how to create relationship between entities. Database designer uses ERD to model physical structure of a relational database, while business analyst uses ERD to model the data that is logically required or produced by processes. : Parameter metadata not available for the given statementģ.ERD, short form for Entity Relationship diagram is a kind of diagram for presenting the properties as well as the relationships between data or participants. GetParameterTypeName(int param) -Parameter type name GetParameterType(int param) - parameter type

GetParameterCount() parameter number-? number ParameterMetaData parameter metadata - get the precompiled SQL statement? Information Insert into users into users into users Obtain JDBC connection parameters, obtain primary key, foreign key information, obtain data table, obtain data column informationĢ. Id int primary key not null auto_increment, Write JDBCUtils ( Use c3p0 connection pool to get a connection) DatabaseMetaData database metadata - Obtain database structure informationĬopy the jar package of mysql driving c3p0 into WEB-INF/libĬopy c3p0-config.xml into the src directory (modify database connection parameters) Learning metadata API to obtain database, table, column definition informationġ. What is database metadata (MetaData): database storage structure definition information (database, table, column definition information)

STARUML ER DIAGRAM ADD AUTOINCREMENT CODE

Write your own JDBC framework (focus on understanding framework writing ideas, code No requirement) Develop web programs in the enterprise, connect to the database through JDBC frameworkġ, JDBC metadata API (basic for writing JDBC framework)Ģ. People use JDBC to develop directly, which is very troublesome.