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update e select


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porque nao guardas o valor dentro de uma variavel?

este exemplo assume que (SELECT dagger FROM fleets  WHERE id = 10) so retorna 1 linha.

declare @dagger decimal(18,4)

select @dagger =dagger FROM fleets  WHERE id = 10

UPDATE fleets SET dagger = dagger+ @dagger WHERE base = 1 AND location = 16

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Olá a todos.

Deperei-me com o seguinte problema:

UPDATE fleets SET dagger = dagger+(SELECT dagger FROM fleets  WHERE id = 10) WHERE base = 1 AND location = 16

Dá-me erro no SELECT entre parentices.

Alguém sabe maneira de contornar este problema?


Tens de garantir que retornas apenas um registo, vê se o teu SGBD suporta MAXROWS ou TOP no SELECT.

10 REM Generation 48K!
20 INPUT "URL:", A$
30 IF A$(1 TO 4) = "HTTP" THEN PRINT "400 Bad Request": GOTO 50
40 PRINT "404 Not Found"
50 PRINT "./M6 @ Portugal a Programar."


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