SQL不存在创建，存在更新

<insert id="insertCompanyMegBase" useGeneratedKeys="true" keyProperty="id" parameterType="com.sptit.isv.pojo.db1.DevCompanyMegBase">
		<selectKey keyProperty="count" resultType="java.lang.Integer" order="BEFORE">
			SELECT COUNT(*) as count FROM company_meg_base WHERE apply_id = #{applyId} AND type = #{type}
		</selectKey>
		<!--如果不存在创建  -->
		<if test="count==0">
			INSERT INTO company_meg_base
			<trim prefix="(" suffix=")" suffixOverrides="," >
		      <if test="editTime != null" >
			  	edit_time ,
		      </if>
		    </trim>
		    <trim prefix="values (" suffix=")" suffixOverrides="," >
		      <if test="editTime != null" >
		        #{editTime,jdbcType=TIMESTAMP},
		      </if>
		    </trim>
		</if>
		<!--如果存在更新  -->
		<if test="count > 0">
		    UPDATE company_meg_base
		    <set>
		      	<if test="editTime != null" >
		        	edit_time = #{editTime,jdbcType=TIMESTAMP},
		      	</if>
		    </set>
		    WHERE apply_id = #{applyId} AND type = #{type}
		</if>
	</insert>