Derby Alter Table
The Derby Alter Table Tool allows users to visually alter tables. The Alter Table Tool can generate and/or execute the SQL that corresponds to any table alterations specified by the user.
The following options are available for the Derby Alter Table Tool.
Add Column - Adds a column to a table
Add Primary Key - Adds a primary key to a table
Add Foreign Key - Adds a foreign key to a table
Add Constraint - Adds a check constraint to a table
Drop Column - Drops a column from a table
Drop Constraint - Drops a check constraint from a table
Listed below are some sample SQL statements generated by the Alter Table Tool.
ALTER TABLE APP.EMPLOYEE ADD NEWCOL CHAR(25)
ALTER TABLE APP.EMPLOYEE ADD PRIMARY KEY (SSN)
ALTER TABLE APP.EMPLOYEE
ADD FOREIGN KEY (DNO)
REFERENCES APP.DEPARTMENT(DNUMBER)
