SQL語句演變一：

SELECT?tA.a_code,?tA.b_code,?tA.c_code,?tA.a_name,?tA.a_time,?
	???tB.b_clazz,?tC.c_model,?tD.d_good	
FROM?TableA?tA
LEFT?JOIN?TableB?tB?ON?tA.a_code?=?tB.a_code??
LEFT?JOIN?TableC?tC?ON?tA.b_code?=?tC.b_code	?
LEFT?JOIN?TableD?tD?ON?tA.c_code?=?tD.c_code	

SQL語句演變二：

SELECT?Tab.a_code,?Tab.b_code,?Tab.c_code,?Tab.a_name,?Tab.a_time,?Tab.b_clazz,?Tab.c_model,?Tab.d_good
FROM	
(SELECT?tA.a_code,?tA.b_code,?tA.c_code,?tA.a_name,?tA.a_time,?
	???tB.b_clazz,?tC.c_model,?tD.d_good	
FROM?TableA?tA
LEFT?JOIN?TableB?tB?ON?tA.a_code?=?tB.a_code??
LEFT?JOIN?TableC?tC?ON?tA.b_code?=?tC.b_code	?
LEFT?JOIN?TableD?tD?ON?tA.c_code?=?tD.c_code)?Tab

SQL語句演變?nèi)?br />

Mybatis中的動(dòng)態(tài)sql，條件查詢，模糊匹配。

SELECT?Tab.a_code,?Tab.b_code,?Tab.c_code,?Tab.a_name,?Tab.a_time,?Tab.b_clazz,?Tab.c_model,?Tab.d_good
FROM	
	(SELECT?tA.a_code,?tA.b_code,?tA.c_code,?tA.a_name,?tA.a_time,?
		???tB.b_clazz,?tC.c_model,?tD.d_good	
	FROM?TableA?tA
	LEFT?JOIN?TableB?tB?ON?tA.a_code?=?tB.a_code??
	LEFT?JOIN?TableC?tC?ON?tA.b_code?=?tC.b_code	?
	LEFT?JOIN?TableD?tD?ON?tA.c_code?=?tD.c_code)?Tab	

		Tab.a_code?LIKE?CONCAT('%',?#{a_code},?'%')	
		AND?Tab.b_code?LIKE?CONCAT('%',?#{b_code},?'%')	
		AND?Tab.c_model?LIKE?CONCAT('%',?#{c_model},?'%')