1

business/model/dao/print_bill.go

@@ -0,0 +1,7 @@
+package dao
+
+// DeductionPrintBalance 扣除打印机账号余额
+func DeductionPrintBalance(db *DaoDB, printNo string) error {
+	_, err := ExecuteSQL(db, `UPDATE print_bill SET print_balance = print_balance -1 WHERE print_no = ?`, []interface{}{printNo}...)
+	return err
+}