ORDER BY CASE WHEN score = 0 THEN 1 ELSE 0 END, score DESC, name ASC; 在这个例子中,我们使用CASE WHEN THEN语句对score进行特殊处理。如果score等于0,则将其排在最后(通过WHEN score = 0 THEN 1实现),否则按照正常顺序排列(通过ELSE 0实现)。然后按照score从高到低进行排序(DESC),对于score相同的用户...
<update id="updateBatch">update t_calendar_extend<trim prefix="set"suffixOverrides=","><trim prefix="modify_time = case index"suffix="end,"><foreach collection="list"item="item">when #{item.index}then #{item.modifyTime}</foreach></trim><trim prefix="user_type = case index"suffix="...
update wms_bt_gfc_bill_create <set> relation_order_code = <foreach collection="models" item="model" open="CASE id" close=" END,"> WHEN #{model.id} THEN <if test="model.relationOrderCode != null and model.relationOrderCode !=''"> #{model.relationOrderCode,jdbcType=VARCHAR} </if>...
Mybatis中使用CASE WHEN表达式，可以实现根据条件进行复杂逻辑判断和数据转换。CASE WHEN有简单形式和搜索形式两种。简单形式为：CASE sex WHEN '1' THEN '男' WHEN '2' THEN '女' ELSE '其他' END 搜索形式为：CASE WHEN sex = '1' THEN '男' WHEN sex = '2' THEN '女' ELSE '其他' E...
简单Case函数的写法相对比较简洁,但是和Case搜索函数相比,功能方面会有些限制,比如写判断式。还有一个需要注意的问题,Case函数只返回第一个符合条件的值,剩下的Case部分将会被自动忽略。–比如说,下面这段SQL,你永远无法得到“第二类”这个结果CASE WHEN col_1 IN ( ‘a’, ‘b’) THEN ‘第一类’WHEN col_...
<trim prefix="attendance_months=case" suffix="end,"> <foreach collection="list" item="cus"> <iftest="cus.attendanceMonths != null ">when id=#{cus.id} then #{cus.attendanceMonths}</if> </foreach> </trim> <trim prefix="endowment_insurance=case" suffix="end,"> ...
count(case when ob.apply_status > 1 and ob.apply_status < 6 then ob.apply_status end) as sumInProgressCount, count(case when ob.apply_status = 7 then ob.apply_status end) as sumFailLoanCount, count(case when ob.release_status = 1 then ob.release_status end) as sumReleaseCount, ...
{item.modifyTime}</foreach></trim><trimprefix="user_type = case index"suffix="end"><foreachcollection="list"item="item">when #{item.index} then #{item.type}</foreach></trim></trim><where>index in (<foreachcollection="list"separator=","item="item">#{item.index}</foreach>)</...
2. case when ... then ... when .. then .. end as .. 3. 批量更新foreach <if test="ids != null and ids != ''"> AND id in <foreach collection="ids" item="id" open="(" separator="," close=")"> #{id} </foreach> ...
select case when count(主键字段) > 0 then 1 else 0 end as result from table where 主键字段 = ? 代码语言:javascript 代码运行次数:0 运行 AI代码解释 booleanexistsWithPrimaryKey(Object var1); 3.4 修改 UpdateByPrimaryKeyMapper 接口有一个方法 updateByPrimaryKey,根据主键字段准确地修改某一条记录。