This extension for StarUML (http://staruml.io) support to generate DDL (Data Definition Language) from ERD. Install this extension from Extension Manager of StarUML.

1. Click the menu (Tools > DDL > Generate DDL...)
2. Select a data model that will be generated to DDL.
3. Save the generated DDL to a file.

Belows are the rules to convert from ERD elements to DDL.

• All entities and columns are converted to create table statements as follow:

CREATE TABLE entity1 (
    col1 INTEGER,
    col2 VARCHAR(20),
    ...
);

• Primary keys are converted as follow:

CREATE TABLE entity1 (
    pk1 INTEGER,
    pk2 VARCHAR(10),
    ...
    PRIMARY KEY (pk1, pk2, ...)
);

• Not-nullable columns are converted as follow:

CREATE TABLE entity1 (
    col1 VARCHAR(20) NOT NULL,
    ...
);

• Unique columns are converted as follow:

CREATE TABLE entity1 (
    ...
    UNIQUE (col1, col2, ...)
);

• Foreign keys are converted as follow:

CREATE TABLE entity1 (
    fk1 INTEGER,
    ...
);
...

ALTER TABLE entity1 ADD FOREIGN KEY (fk1) REFERENCES entity2(col1);

• If Quote Identifiers option is selected, all identifiers will be surrounded by a backquote character.

CREATE TABLE `entity1` (
    `col1` INTEGER,
    `col2` VARCHAR(20),
    ...
);

• If Drop Tables option is selected, drop table statements will be included.

(MySQL selected in DBMS option)

SET FOREIGN_KEY_CHECKS = 0;
DROP TABLE IF EXISTS entity1;
...
SET FOREIGN_KEY_CHECKS = 1;

CREATE TABLE entity1 (...);
...

(Oracle selected in DBMS option)

DROP TABLE entity1 CASCADE CONSTRAINTS;`
...

CREATE TABLE entity1 (...);
...

Any contributions are welcome. If you find a bug or have a suggestion, please post as an issue.