6 lines
262 B
SQL
6 lines
262 B
SQL
ALTER TABLE invoices
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ADD COLUMN storno_of_id INT UNSIGNED NULL DEFAULT NULL
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COMMENT 'FK zur stornierten Originalrechnung'
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AFTER beleg_id,
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ADD CONSTRAINT fk_invoices_storno_of
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FOREIGN KEY (storno_of_id) REFERENCES invoices(id) ON DELETE SET NULL;
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