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extract values

smitha mano
Ranch Hand

Joined: Sep 26, 2005
Posts: 70
CREATE TABLE special
(
id serial NOT NULL,
specialname varchar(50),
CONSTRAINT special_pk PRIMARY KEY (id)
)

CREATE TABLE person
(
id serial NOT NULL,
name varchar(60),
qualification varchar(100),
exp int4,
history text,
CONSTRAINT person_pk PRIMARY KEY (id)
)


CREATE TABLE person_spec_group
(
fk_person int4 NOT NULL,
fk_special int4 NOT NULL,
CONSTRAINT person_spec_group FOREIGN KEY (fk_person) REFERENCES person (id) ON UPDATE RESTRICT ON DELETE RESTRICT,
CONSTRAINT special_spec_group FOREIGN KEY (fk_special) REFERENCES special (id) ON UPDATE RESTRICT ON DELETE RESTRICT
)

special table
to store the specialname
person table to store the details of a person
person_spec_group table to store the ids of special table and person table

How to works this or how to write action class and SQL query?
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: extract values