更改默认值为0

sql/update.sql

@@ -1,5 +1,5 @@
 ALTER TABLE `zh_change_audit_list`
-ADD COLUMN `checked_amount` decimal(30, 8) NULL DEFAULT NULL COMMENT '审批变更后数量（整型）' AFTER `samount`,
-ADD COLUMN `checked_price` decimal(30, 8) NULL DEFAULT NULL COMMENT '审批变更后金额（整型）' AFTER `checked_amount`;
+ADD COLUMN `checked_amount` decimal(30, 8) NULL DEFAULT 0 COMMENT '审批变更后数量（整型）' AFTER `samount`,
+ADD COLUMN `checked_price` decimal(30, 8) NULL DEFAULT 0 COMMENT '审批变更后金额（整型）' AFTER `checked_amount`;
 
 UPDATE `zh_change_audit_list` SET `checked_amount` = CONVERT(`samount`, DECIMAL) WHERE `samount` != '';