标签：values 效率 tor ble delete 数据 tis enter 频繁
批量插入数据使用的sql语句是：
insert into table (字段一,字段二,字段三) values(xx,xx,xx),(oo,oo,oo)
mapper文件：
int insertBatch(List<TmApplyTemplateDetail> applyTemplateDetailList);
mapper.xml文件:
<insert id="insertBatch" parameterType="list">
insert into
tm_apply_template_detail(
template_id,model_id,total_count,remark
)
values
<foreach collection="list" item="item" separator=",">
(
#{templateId},#{modelId},#{totalCount},#{remark}
)
</foreach>
</insert>
注意：当然你也可以在Java中写个循环，然后一条条的去添加，不过这样频繁insert执行效率比较低，在项目规模比较小和一次性插入数据不多时可以用。还是建议批量添加。
批量更新SQL：
UPDATE table SET aa = CASE id WHEN 1 THEN ‘oo‘ WHEN 2 THEN ‘pp‘ WHEN 3 THEN ‘qq‘ END ,SET bb = CASE id WHEN 1 THEN ‘xx‘ WHEN 2 THEN ‘yy‘ WHEN 3 THEN ‘zz‘ END WHERE id IN (1,2,3)
mapper.xml文件:
<update id="updateBatch">
update wd_solr set
name =
<foreach collection="list" item="item" separator=" " open="case id" close="end">
when #{item.id} then
#{item.name}
</foreach>
,logo =
<foreach collection="list" item="item"separator=" " open="case id" close="end">
when #{item.id} then
#{item.logo}
</foreach>
,timestamp =
<foreach collection="list" item="item"separator=" " open="case id" close="end">
when #{item.id}
then #{item.timestamp}
</foreach>
where id in
<foreach collection="list" item="item" separator="," open="(" close=")">
#{item.id}
</foreach>
</update>
SQL：
delete from table where XX IN(XX,XX,XX)
mapper.xml:
<delete id="deleteByBatch"> delete from t_enterprise_output_value where output_id IN <foreach collection="array" item="outputId" open="(" separator="," close=")"> #{outputId} </foreach> </delete>
标签：values 效率 tor ble delete 数据 tis enter 频繁
原文地址：https://www.cnblogs.com/zhulei2/p/13432059.html
