books/backend/Books.Api/Database/Migrations/015_AddStandardAccountNumber.sql

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-- 015_AddStandardAccountNumber.sql
-- Adds Erhvervsstyrelsens standardkontonummer field for SAF-T 2.0 compliance
-- Required by January 2027 per Danish bookkeeping law (bogføringsloven)
-- Add the standard_account_number column
ALTER TABLE account_read_models
ADD COLUMN IF NOT EXISTS standard_account_number VARCHAR(10);
-- Create index for efficient lookups by standard account number
-- Useful for SAF-T export and reporting
CREATE INDEX IF NOT EXISTS idx_account_standard_number
ON account_read_models(company_id, standard_account_number)
WHERE standard_account_number IS NOT NULL;
-- Add comment for documentation
COMMENT ON COLUMN account_read_models.standard_account_number IS
'Erhvervsstyrelsens standardkontonummer for SAF-T rapportering. Mapping til officiel dansk kontoplan.';