mysql，公司真实查询sql，看到后整个人就不好了

 1.公司一个报表查询业务，sql如下：

SELECT tend.sellId, au.name AS userName, SUM(sellTotalPrice) AS sellTotalPrice
	, SUM(refundTotalPrice) AS refundTotalPrice, SUM(sellTotalPrice_ali) AS sellTotalPrice_ali
	, SUM(refundTotalPrice_ali) AS refundTotalPrice_ali, SUM(sellTotalPrice_wx) AS sellTotalPrice_wx
	, SUM(refundTotalPrice_wx) AS refundTotalPrice_wx, SUM(sellTotalPrice_union) AS sellTotalPrice_union
	, SUM(refundTotalPrice_union) AS refundTotalPrice_union
FROM (
	SELECT tol.*
		, CASE 
			WHEN orderUserId IS NOT NULL THEN orderUserId
			ELSE createUser
		END AS sellId
	FROM (
		(SELECT ttt.orderUserId, ttt.sellTotalPrice, ttt.sellTotalPrice_ali, ttt.sellTotalPrice_union, ttt.sellTotalPrice_wx
			, tp.*
		FROM (
			SELECT orderUserId, payWay, SUM(sellTotalPrice) AS sellTotalPrice
				, SUM(sellTotalPrice_ali) AS sellTotalPrice_ali, SUM(sellTotalPrice_union) AS sellTotalPrice_union
				, SUM(sellTotalPrice_wx) AS sellTotalPrice_wx
			FROM (
				(SELECT accounter AS orderUserId, payWay, payTotalSum
					, CASE 
						WHEN payWay = 1 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice
					, CASE 
						WHEN payWay = 15 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_ali
					, CASE 
						WHEN payWay = 16 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_union
					, CASE 
						WHEN payWay = 14 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_wx
				FROM (
					SELECT accounter, payWay, SUM(payTotal) AS payTotalSum
					FROM t_order
					WHERE (accountTime >= NULL
						AND accountTime <= NULL
						AND orderChannel = 2
						AND accountState = 1
						AND payStatus = 1
						AND isDelete = 0)
					GROUP BY accounter, payWay
				) tod)
				UNION ALL
				(SELECT accounter AS orderUserId, payWay, payTotalSum
					, CASE 
						WHEN payWay = 1 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice
					, CASE 
						WHEN payWay = 15 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_ali
					, CASE 
						WHEN payWay = 16 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_union
					, CASE 
						WHEN payWay = 14 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_wx
				FROM (
					SELECT accounter, payWay, SUM(payTotal) AS payTotalSum
					FROM t_history_order
					WHERE (accountTime >= NULL
						AND accountTime <= NULL
						AND orderChannel = 2
						AND accountState = 1
						AND payStatus = 1
						AND isDelete = 0)
					GROUP BY accounter, payWay
				) tod)
			) tt
			GROUP BY orderUserId, payWay
		) ttt
			LEFT JOIN (
				SELECT createUser, payWay, actualPriceSum, SUM(refundTotalPrice) AS refundTotalPrice
					, SUM(refundTotalPrice_ali) AS refundTotalPrice_ali, SUM(refundTotalPrice_union) AS refundTotalPrice_union
					, SUM(refundTotalPrice_wx) AS refundTotalPrice_wx
				FROM (
					SELECT createUser, payWay, actualPriceSum
						, CASE 
							WHEN payWay = 1 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice
						, CASE 
							WHEN payWay = 15 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice_ali
						, CASE 
							WHEN payWay = 16 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice_union
						, CASE 
							WHEN payWay = 14 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice_wx
					FROM (
						SELECT createUser, payWay, SUM(actualPriceSum) AS actualPriceSum
						FROM (
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_order_detail
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_order_detail_sessions
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_order_detail_long
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_history_order_detail
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_history_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_history_order_detail_sessions
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_history_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_history_order_detail_long
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_history_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
						) tdall
						GROUP BY createUser, payWay
					) tr
				) trr
				GROUP BY createUser, payWay, actualPriceSum
			) tp
			ON ttt.orderUserId = tp.createUser
				AND ttt.payWay = tp.payWay)
		UNION
		(SELECT ttt.orderUserId, ttt.sellTotalPrice, ttt.sellTotalPrice_ali, ttt.sellTotalPrice_union, ttt.sellTotalPrice_wx
			, tp.*
		FROM (
			SELECT orderUserId, payWay, SUM(sellTotalPrice) AS sellTotalPrice
				, SUM(sellTotalPrice_ali) AS sellTotalPrice_ali, SUM(sellTotalPrice_union) AS sellTotalPrice_union
				, SUM(sellTotalPrice_wx) AS sellTotalPrice_wx
			FROM (
				(SELECT accounter AS orderUserId, payWay, payTotalSum
					, CASE 
						WHEN payWay = 1 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice
					, CASE 
						WHEN payWay = 15 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_ali
					, CASE 
						WHEN payWay = 16 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_union
					, CASE 
						WHEN payWay = 14 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_wx
				FROM (
					SELECT accounter, payWay, SUM(payTotal) AS payTotalSum
					FROM t_order
					WHERE (accountTime >= NULL
						AND accountTime <= NULL
						AND orderChannel = 2
						AND accountState = 1
						AND payStatus = 1
						AND isDelete = 0)
					GROUP BY accounter, payWay
				) tod)
				UNION ALL
				(SELECT accounter AS orderUserId, payWay, payTotalSum
					, CASE 
						WHEN payWay = 1 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice
					, CASE 
						WHEN payWay = 15 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_ali
					, CASE 
						WHEN payWay = 16 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_union
					, CASE 
						WHEN payWay = 14 THEN payTotalSum
						ELSE 0
					END AS sellTotalPrice_wx
				FROM (
					SELECT accounter, payWay, SUM(payTotal) AS payTotalSum
					FROM t_history_order
					WHERE (accountTime >= NULL
						AND accountTime <= NULL
						AND orderChannel = 2
						AND accountState = 1
						AND payStatus = 1
						AND isDelete = 0)
					GROUP BY accounter, payWay
				) tod)
			) tt
			GROUP BY orderUserId, payWay
		) ttt
			RIGHT JOIN (
				SELECT createUser, payWay, actualPriceSum, SUM(refundTotalPrice) AS refundTotalPrice
					, SUM(refundTotalPrice_ali) AS refundTotalPrice_ali, SUM(refundTotalPrice_union) AS refundTotalPrice_union
					, SUM(refundTotalPrice_wx) AS refundTotalPrice_wx
				FROM (
					SELECT createUser, payWay, actualPriceSum
						, CASE 
							WHEN payWay = 1 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice
						, CASE 
							WHEN payWay = 15 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice_ali
						, CASE 
							WHEN payWay = 16 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice_union
						, CASE 
							WHEN payWay = 14 THEN actualPriceSum
							ELSE 0
						END AS refundTotalPrice_wx
					FROM (
						SELECT createUser, payWay, SUM(actualPriceSum) AS actualPriceSum
						FROM (
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_order_detail
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_order_detail_sessions
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_order_detail_long
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_history_order_detail
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_history_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_history_order_detail_sessions
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_history_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
							UNION ALL
							(SELECT t.payWay, tod.accounter AS createUser, SUM(tod.actualPrice) AS actualPriceSum
							FROM (
								SELECT orderId, accounter, actualPrice
								FROM t_history_order_detail_long
								WHERE (accountTime >= NULL
									AND accountTime <= NULL
									AND accountState = 1
									AND isDelete = 0
									AND refundStatus = 5)
							) tod, t_history_order t
							WHERE (t.orderChannel = 2
								AND tod.orderId = t.id
								AND t.isDelete = 0)
							GROUP BY tod.accounter, t.payWay)
						) tdall
						GROUP BY createUser, payWay
					) tr
				) trr
				GROUP BY createUser, payWay, actualPriceSum
			) tp
			ON ttt.orderUserId = tp.createUser
				AND ttt.payWay = tp.payWay)
	) tol
) tend, admin_user au
WHERE tend.sellId = au.id
GROUP BY tend.sellId, au.name

2.不说sql性能怎么样，能写出这么长的还没错的sql我真的很佩服

3.这种长sql要怎么优化，怎么分解呢，要吐血，求大神指点啊