SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'dispatched_at' The SQL being executed was: ALTER TABLE sales_flat_order
ADD audited_at
INT( 12 ) NULL COMMENT '订单后台审核时间', ADD dispatched_at
INT( 12 ) NULL COMMENT '订单发货时间', ADD received_at
INT( 12 ) NULL COMMENT '订单收货时间', ADD reviewed_at
INT( 12 ) NULL COMMENT '订单评论时间'
第一次安装 mysql表就创建了,卸载后再安装 sql执行会报错,怎么办?