按需求调整

backend/src/main/resources/mapper/SchoolMapper.xml

@@ -12,6 +12,12 @@
         <result column="updated_at" property="updatedAt"/>
     </resultMap>
 
+    <select id="selectById" resultMap="BaseResultMap">
+        SELECT id, school_code, school_name, location, created_at, updated_at
+        FROM crm_school
+        WHERE id = #{id}
+    </select>
+
     <insert id="insert" parameterType="com.bycrm.entity.School" useGeneratedKeys="true" keyProperty="id">
         INSERT INTO crm_school (school_code, school_name, location, created_at, updated_at)
         VALUES (#{schoolCode}, #{schoolName}, #{location}, #{createdAt}, #{updatedAt})