Example查詢SQL之or查詢and查詢

• 問題描述

通過Example實現如下SQL語句功能

SELECT T.* FROM DAA_ORGINFO T WHERE T.DAA_ZTNO='參數' AND T.ID = '參數' OR T.DAA_ID_SJ='參數'

 

因為Example‘沒有直接寫or的方法，所以需要通過and來構造改SQL語句，首先我們分析一下，進行改造如下：

SELECT T.* FROM DAA_ORGINFO T WHERE (T.DAA_ZTNO='參數' AND T.ID = '參數') OR (T.DAA_ZTNO='參數' AND T.DAA_ID_SJ='參數')

 

• 解決方法

實現方式如下：

   //1.根據訂單ID查出用戶ID
            Example example=new Example(TOrderOrder.class);
            Example.Criteria criteria = example.createCriteria();
            criteria.andEqualTo("id",orderId)
                     .andGreaterThan("mark",0)
                    .andEqualTo("type",1)
                    .andEqualTo("isReturn",0);
            Example.Criteria criteria2 = example.createCriteria();
            criteria.andEqualTo("id",orderId)
                    .andGreaterThan("mark",0)
                    .andEqualTo("type",2)
                    .andEqualTo("isReturn",0);
            example.or(criteria2);
            List<TOrderOrder> orderInfolist= tOrderOrderDao.getListByExample(example);

 

 

• xml中的SQL寫法，因項目問題，example重新構造，可參考如下：

<select id="getDataGridByExample" resultType="com.ctg.pbis.partymanage.daaorginfo_x.entity.DaaOrginfo">
SELECT T.*, GET_NAME_BYDYID(T.DAB_ID_LXR) DAB_ID_LXR_NAME, GET_NAME_BYDYID(T.DAB_ID_ZZSJ) DAB_ID_ZZSJ_NAME
FROM DAA_ORGINFO T
WHERE 1=1
<if test="example != null">
<trim suffix="" suffixOverrides="and">
<trim suffix="" suffixOverrides="()">
AND
<trim prefix="(" suffix=")">
<foreach collection="example.oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" suffix=")" prefixOverrides="and">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and
#{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")"
separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>

</if>
</foreach>
</trim>
</trim>
</trim>
</if>

<if test="example.orderByClause != null">
order by ${example.orderByClause}
</if>

</select>