|  | @@ -75,6 +75,7 @@
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				|  |  |                  subject_id_list_ = #{subjectIdList},
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				|  |  |              </if>
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				|  |  |              <if test="serviceTag != null">
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				|  |  | +                service_tag_update_time_=IF(service_tag_ = #{serviceTag}, service_tag_update_time_, NOW()),
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				|  |  |                  service_tag_ = #{serviceTag},
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				|  |  |              </if>
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				|  |  |              <if test="operatingTag != null">
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				|  | @@ -86,8 +87,7 @@
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				|  |  |              <if test="teacherId != null">
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				|  |  |                  teacher_id_=#{teacherId},
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				|  |  |              </if>
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				|  |  | -                update_time_ = NOW(),
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				|  |  | -                service_tag_update_time_=IF(service_tag_ = #{serviceTag}, service_tag_update_time_, NOW())
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				|  |  | +                update_time_ = NOW()
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				|  |  |          </set>
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				|  |  |          WHERE user_id_ = #{userId}
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				|  |  |      </update>
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				|  | @@ -190,10 +190,10 @@
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				|  |  |          UPDATE student
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				|  |  |          <set>
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				|  |  |              <if test="serviceTag != null">
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				|  |  | +                service_tag_update_time_ = IF(service_tag_=#{serviceTag}, service_tag_update_time_, NOW()),
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				|  |  |                  service_tag_ = #{serviceTag},
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				|  |  |              </if>
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				|  |  | -            update_time_ = NOW(),
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				|  |  | -            service_tag_update_time_ = IF(service_tag_=#{serviceTag}, service_tag_update_time_, NOW())
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				|  |  | +            update_time_ = NOW()
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				|  |  |          </set>
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				|  |  |          WHERE
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				|  |  |              service_tag_=0
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