Requête DELETE avec jointure

Version imprimable

Bon j'ai fait une requête SQL pour effacer une ligne dans une table d'association. Cependant je ne peu pas croire qui n'y a pas plus simple que ceci :

SQL : Microsoft SQL CE

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
DELETE 
FROM vehasssection
WHERE ID_Vehlisting =
(
SELECT vehasssection.ID_Vehlisting
FROM vehasssection 
JOIN vehlocation ON vehlocation.ID = vehasssection.ID_Location
JOIN vehsection ON vehsection.ID = vehasssection.ID_Section
JOIN vehposition ON vehposition.ID = vehasssection.ID_Position
WHERE vehasssection.ID_Vehlisting = '3'
AND vehlocation.Name = 'Exterior'
AND vehsection.Name = 'LeftFront'
AND vehposition.Name = 'Fender'
)
AND ID_Location =
(
SELECT vehasssection.ID_Location
FROM vehasssection 
JOIN vehlocation ON vehlocation.ID = vehasssection.ID_Location
JOIN vehsection ON vehsection.ID = vehasssection.ID_Section
JOIN vehposition ON vehposition.ID = vehasssection.ID_Position
WHERE vehasssection.ID_Vehlisting = '3'
AND vehlocation.Name = 'Exterior'
AND vehsection.Name = 'LeftFront'
AND vehposition.Name = 'Fender'
)
AND ID_Section =
(
SELECT vehasssection.ID_Section
FROM vehasssection 
JOIN vehlocation ON vehlocation.ID = vehasssection.ID_Location
JOIN vehsection ON vehsection.ID = vehasssection.ID_Section
JOIN vehposition ON vehposition.ID = vehasssection.ID_Position
WHERE vehasssection.ID_Vehlisting = '3'
AND vehlocation.Name = 'Exterior'
AND vehsection.Name = 'LeftFront'
AND vehposition.Name = 'Fender'
)
AND ID_Position =
(
SELECT vehasssection.ID_Position
FROM vehasssection 
JOIN vehlocation ON vehlocation.ID = vehasssection.ID_Location
JOIN vehsection ON vehsection.ID = vehasssection.ID_Section
JOIN vehposition ON vehposition.ID = vehasssection.ID_Position
WHERE vehasssection.ID_Vehlisting = '3'
AND vehlocation.Name = 'Exterior'
AND vehsection.Name = 'LeftFront'
AND vehposition.Name = 'Fender'
)

Je trouve cela gros pour une simple supression de ligne.

Selon la donc je pourrais le faire de cette facon :

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
DELETE 
FROM vehasssection
WHERE (ID_Vehlisting, ID_Location, ID_Section, ID_Position) =
(
SELECT vehasssection.ID_Vehlisting, vehasssection.ID_Location, vehasssection.ID_Section, vehasssection.ID_Position
FROM vehasssection 
JOIN vehlocation ON vehlocation.ID = vehasssection.ID_Location
JOIN vehsection ON vehsection.ID = vehasssection.ID_Section
JOIN vehposition ON vehposition.ID = vehasssection.ID_Position
WHERE vehasssection.ID_Vehlisting = '3'
AND vehlocation.Name = 'Exterior'
AND vehsection.Name = 'LeftFront'
AND vehposition.Name = 'Fender'
)

Cependant cela me donne cette erreur :

Line 3: Incorrect syntax near ','.

Non, car MS SQL Server n'accepte pas le Row Value Constructor (pour en comprendre la technique, lisez l'article que j'ai écrit à ce sujet : http://sqlpro.developpez.com/cours/sqlaz/select/#L8)

Mais en revanche SQL Server permet une syntaxe particulière avec un double FROM :
Code:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 DELETE FROM vehasssection FROM vehasssection V INNER JOIN vehlocation L ON L.ID = V.ID_Location INNER JOIN vehsection S ON S.ID = V.ID_Section INNER JOIN vehposition P ON P.ID = V.ID_Position WHERE V.ID_Vehlisting = '3' AND L.Name = 'Exterior' AND S.Name = 'LeftFront' AND P.Name = 'Fender'
A +

24/03/2006, 13h49
Roach-

Merci je vais lire cela attentivement.
24/03/2006, 15h00
Roach-

Cela fonctionne dans le query analyser sur SQL 2000, cependant la même requête ne fonctionne pas sous SQL CE.