数据查询出来的数据需要某个字段的值不能重复如bill_no
SELECT
oy.id,
oy.bill_no,
oy.bill_status,
oy.customer_id,
oy.customer_name,
oy.saler_id,
oy.saler_name,
oy.disabled_date,
oy.`note`,
oy.crt_time
FROM
oms_sale_inquiry oy
SELECT
MAX(oy.id),
MAX(oy.bill_no),
MAX(oy.bill_status),
MAX(oy.customer_id),
MAX(oy.customer_name),
MAX(oy.saler_id),
MAX(oy.saler_name),
MAX(oy.disabled_date),
MAX(oy.`note`),
MAX(oy.crt_time)
FROM
oms_sale_inquiry oy
GROUP BY oy.bill_no
ORDER BY MAX(oy.crt_time) DESC
去重完数据