Join three tables and specify criteria... I know this should be easy!

Hi all, having a bit of a brain burp day! :-)

I have

CREATE TABLE user
(
user_id INTEGER PRIMARY KEY,
user_name VARCHAR(25),
);

CREATE TABLE language
(
iso_code CHAR(2) PRIMARY KEY,
language_name VARCHAR(30)
);

CREATE TABLE user_language
(
ul_user_id INT,
ul_iso_code CHAR(2),
PRIMARY KEY (ul_user_id, ul_iso_code),
CONSTRAINT ul_user_id_fk FOREIGN KEY (ul_user_id) REFERENCES user
(user_id),
CONSTRAINT ul_iso_code_fk FOREIGN KEY (ul_iso_code) REFERENCES language
(iso_code)
);

Then I input data thus.

INSERT INTO user VALUES(1, 'Sandor');
INSERT INTO user VALUES(2, 'Gabor');

INSERT INTO language VALUES ('EN', 'English');
INSERT INTO language VALUES ('DE', 'German');

INSERT INTO user_language VALUES(1, 'EN');
INSERT INTO user_language VALUES(1, 'DE');
INSERT INTO user_language VALUES(2, 'EN');

Now, I want the user who speaks English and the German - I may need to
specify 3, 4
or conceivably even 5 languages.

I have done this, but I'm stuck :-)

SELECT u.user_name, l.language_name
FROM user u
JOIN user_language ul
ON u.user_id = ul.ul_user_id
JOIN language l
ON ul.ul_iso_code = l.iso_code

this gives me

Sandor, German
Sandor, English
Gabor, English

I really want Sandor's id - that's all that really counts.

Give me the ids of all who speak 'EN' and 'DE' (or
possibly 'EN', 'DE', 'NL' and 'FR') for example.

TIA and rgs,

Paul...

--

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