Question

Is it possible via script/tool to generate a delete statement based on the tables fk relations.

i.e. I have the table: DelMe(ID) and there are 30 tables with fk references to its ID that I need to delete first, is there some tool/script that I can run that will generate the 30 delete statements based on the FK relations for me ?

(btw I know about cascade delete on the relations, I can’t use it in this existing db)

I’m using Microsoft SQL Server 2008

Answer 1

DELETE statements generated for use in SP with parameter, and as ON DELETE triggers: (this variant supports single column FKs only)

SELECT 'DELETE '+detail.name+' WHERE '+dcolumn.name+' = @'+mcolumn.name AS stmt,      'DELETE ' + detail.name + ' FROM ' + detail.name + ' INNER JOIN deleted ON ' +      detail.name + '.' + dcolumn.name + ' = deleted.' + mcolumn.name AS trg FROM sys.columns AS mcolumn  INNER JOIN sys.foreign_key_columns ON mcolumn.object_id =              sys.foreign_key_columns.referenced_object_id      AND  mcolumn.column_id = sys.foreign_key_columns.referenced_column_id  INNER JOIN sys.tables AS master ON mcolumn.object_id = master.object_id  INNER JOIN sys.columns AS dcolumn      ON sys.foreign_key_columns.parent_object_id = dcolumn.object_id      AND sys.foreign_key_columns.parent_column_id = dcolumn.column_id  INNER JOIN sys.tables AS detail ON dcolumn.object_id = detail.object_id WHERE (master.name = N'MyTableName')