How can this SQL statement throw the following exception? -


how can statement:

delete passage passageid not in (     select passageid preendedpassages_passages     union select frompassageid severalvisit     union select topassageid severalvisit     union select registerpassageid stationobjects registerpassageid not null     union select beginpassageid stationobjects beginpassageid not null     union select endpassageid stationobjects endpassageid not null )

throw exception?

the delete statement conflicted foreign key constraint "fk_statobj_begpasid". conflict occurred in database "db.mdf", table "dbo.stationobjects", column 'beginpassageid'.

i have no clue, happened. beginpassageid foreign key on passageid.

edit: consider not in. want delete passages don't exist in 1 of related tables. works, happened once.

thank you.

it means passage parent table. , stationobjects child table. trying remove passageid passage table present in stationobjects table well.

first try remove passageid stationobjects , can run delete statement.

alternate approach cascade delete, if db supports that.


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