sql實例

關聯三張表

<!-- 查詢（根據查詢條件分頁查詢） -->

<select id="getListMapPage" resultType="hashmap" parameterType="hashmap">

SELECT

tdmm.id as id,

tdmm.delivery_man_id as deliveryManId,

tdmm.customer_id as customerId,

tdmm.open_id as openId,

 

tdm.id as customerId,

tdm.login_name as customerLoginName,

tdm.real_name as customerRealName,

 

tc.id as deliveryManId,

tc.login_name as deliveryManLoginName,

tc.real_name as deliveryManRealName

 

FROM table1 tdmm

LEFT JOIN table2 tdm  on(tdmm.delivery_man_id=tc.id)                     左關聯

LEFT JOIN table3 tc     on(tdmm.customer_id=tdm.id)

WHERE tdmm.status = 1 條件

limit ${(page-1)*pagesize},${pagesize}

</select>