• 郑州信盈达教育专注于提供高端方案设计、高端嵌入式培训服务
  • 专业为个人和企业提供嵌入式产品研发、生产、测试等服务
  • 郑州信盈达教育可根据客户需求设计产品的软件、硬件

400-888-9073

嵌入式Linux开发全栈课程体系:从基础编程到项目实战的技术进阶路径

嵌入式Linux开发全栈课程体系:从基础编程到项目实战的技术进阶路径

授课机构: 郑州信盈达教育

上课地点: 校区地址

成交/评价:

联系电话: 400-888-9073

嵌入式Linux开发全栈课程体系:从基础编程到项目实战的技术进阶路径课程详情

嵌入式Linux开发全栈课程体系解析

课程核心定位与教学特色

在智能硬件与物联网快速发展的技术浪潮中,嵌入式Linux开发作为连接硬件与软件的关键桥梁,正成为电子信息、计算机相关领域从业者的核心技能方向。本课程立足行业需求,以"零基础可学、全流程覆盖、双平台实战"为设计理念,融合国内Linux与嵌入式培训精华,并引入最新Linux 4.x驱动开发技术,构建起从编程基础到产品级项目落地的完整知识链条。

区别于单一理论讲解的传统课程,教学过程采用Cortex-M4与四核ARM Cortex A9双硬件平台同步教学模式。其中Cortex-M4平台侧重低功耗、实时性场景的驱动开发实践,ARM Cortex A9则聚焦高性能计算与复杂系统移植,两种平台的交叉训练能帮助学员更全面理解不同场景下的技术实现差异。

八大阶段课程体系详解

课程设计遵循"基础夯实-技能进阶-实战突破"的认知逻辑,将知识体系拆解为八大核心阶段,每个阶段均设置理论讲解与项目实训环节,确保技术掌握的扎实性与应用灵活性。

阶段:Linux开发基础构建

从C语言程序结构解析入手,系统学习编译原理、基本数据类型操作及输入输出函数应用。重点掌握Linux环境下的程序设计方法,深入理解Makefile工具的项目管理逻辑,并通过Shell编程实现自动化脚本开发。此阶段通过大量代码练习,帮助学员建立Linux开发环境的基础操作能力。

第二阶段:C语言高级编程进阶

在巩固基础语法的前提下,重点突破指针、结构体、链表等核心数据结构。通过排序算法实现、递归函数设计等实战项目,深入理解程序内存管理机制。阶段末设置综合项目实战,要求学员完成包含数据存储、逻辑处理、结果输出的完整C语言应用开发,强化代码编写与调试能力。

第三阶段:Linux高级系统编程

聚焦多进程/多线程编程、Socket网络通信等核心技术。通过文件描述符操作实现非缓冲IO管理,掌握进程间通信(IPC)的多种实现方式(管道、共享内存、消息队列)。结合IO多路复用技术完成高并发场景模拟,阶段项目要求开发支持多客户端连接的网络服务程序,全面提升系统级编程能力。

第四阶段:Cortex-M4驱动开发实战

基于STM32F407硬件平台,依次完成GPIO、UART、中断、DMA等基础模块开发。深入学习定时器、ADC模数转换、RTC实时时钟等功能实现,结合TFTLCD显示与触摸屏交互技术完成GUI界面开发。阶段后期引入UCOS-II实时操作系统,通过环境检测、智能机械手臂等热门项目,掌握低功耗场景下的驱动开发与系统集成。

第五阶段:嵌入式Linux驱动开发(A9/A72双平台)

以RK-3399开发板为载体,系统学习u-boot引导程序移植、Linux内核裁剪与编译、根文件系统制作等关键技术。重点突破字符设备驱动、中断编程、平台总线驱动模型等核心模块,完成LCD、触摸屏、I2C等常用设备的驱动移植与应用开发。阶段项目要求实现完整的Linux驱动开发流程,从内核配置到用户态程序调试全面覆盖。

第六阶段:Android驱动开发与系统交互

聚焦Android系统驱动开发与JNI/NDK技术应用,深入理解Binder通信机制与SystemServer组件管理。通过LED、按键、蜂鸣器等典型设备的驱动开发实例,掌握Android驱动与应用层的交互逻辑。阶段项目要求开发包含驱动程序、JNI接口、Android应用的完整设备管理系统,强化跨层开发能力。

第七阶段:C++与QT应用开发

系统学习C++类与对象、继承多态、模板编程等核心特性,结合Qt框架掌握跨平台GUI开发技术。通过图片浏览器、MP3播放器、网络视频播放器等实战项目,深入理解信号与槽机制的应用逻辑,为后续综合项目的人机交互开发奠定基础。

第八阶段:Linux综合项目实战

整合前七阶段知识,完成智能家居管理、智能医疗系统、物联网监控等8大行业热门项目开发。从需求分析、架构设计到代码实现、测试优化,全程模拟企业级开发流程,培养学员独立完成嵌入式Linux产品开发的综合能力。

适合人群与学习目标

课程设置充分考虑不同技术背景学员的需求,覆盖从零基础入门到技术进阶的全阶段人群:

  • 希望转型嵌入式应用开发的工程师
  • 基础扎实的在读研究生或应届毕业生
  • 熟悉Linux应用开发,想打通系统级开发链路的技术人员
  • 专注驱动开发与系统移植的技术从业者
  • 有硬件维修经验,希望转向软件开发的爱好者
  • 在职工程师的技术提升需求者

通过系统学习,学员将达成以下核心目标:

  • 掌握操作系统原理、编译原理等底层知识体系
  • 精通Linux命令操作、Shell编程与系统配置
  • 熟练运用Linux系统调用完成高性能应用开发
  • 深度掌握ARM Cortex-A9架构与Bootloader移植技术
  • 具备Linux内核裁剪、驱动开发及系统移植能力
  • 能够独立完成Android驱动开发与跨层系统交互
  • 胜任智能家居、智能医疗等领域的嵌入式项目开发

课程价值与行业意义

作为国内首创覆盖"应用开发-系统移植-驱动开发"全流程的Linux嵌入式课程,本体系不仅整合了当前主流的Cortex-M4与ARM Cortex A9双平台教学资源,更将Linux 4.x驱动开发等前沿技术融入课程内容。无论是想进入嵌入式领域的初学者,还是希望突破技术瓶颈的在职工程师,都能通过本课程构建起完整的技术知识图谱,快速成长为企业需要的"懂硬件、精软件、会开发"的复合型技术人才。

在智能硬件、物联网、人工智能等新兴领域蓬勃发展的今天,掌握嵌入式Linux开发技术不仅意味着更广阔的职业选择空间,更代表着与行业前沿技术同步的能力。本课程正是为满足这一需求而设计,通过系统化的知识传授与实战训练,助力每一位学员在嵌入式领域实现技术跃升与职业发展。

郑州信盈达教育

郑州信盈达教育
认证 7 年

成立: 2006年

认证 地址认证 教学保障 在线预约 到店体验 售后支持
基本 文件 流程 错误 SQL 调试
  1. 请求信息 : 2026-04-04 11:15:51 HTTP/1.1 GET : http://www.peixunbb.com/s/2115/c/31316.html
  2. 运行时间 : 0.093043s [ 吞吐率:10.75req/s ] 内存消耗:388.05kb 文件加载:136
  3. 缓存信息 : 0 reads,0 writes
  1. /data/web/baijiao_branch_collect/public/index.php ( 0.79 KB )
  2. /data/web/baijiao_branch_collect/vendor/autoload.php ( 0.75 KB )
  3. /data/web/baijiao_branch_collect/vendor/composer/autoload_real.php ( 1.63 KB )
  4. /data/web/baijiao_branch_collect/vendor/composer/platform_check.php ( 0.90 KB )
  5. /data/web/baijiao_branch_collect/vendor/composer/ClassLoader.php ( 15.99 KB )
  6. /data/web/baijiao_branch_collect/vendor/composer/autoload_static.php ( 4.26 KB )
  7. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/helper.php ( 8.34 KB )
  8. /data/web/baijiao_branch_collect/vendor/topthink/think-validate/src/helper.php ( 2.19 KB )
  9. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/helper.php ( 1.47 KB )
  10. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/stubs/load_stubs.php ( 0.16 KB )
  11. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Exception.php ( 1.69 KB )
  12. /data/web/baijiao_branch_collect/vendor/topthink/think-container/src/Facade.php ( 2.71 KB )
  13. /data/web/baijiao_branch_collect/vendor/symfony/deprecation-contracts/function.php ( 0.99 KB )
  14. /data/web/baijiao_branch_collect/vendor/symfony/polyfill-mbstring/bootstrap.php ( 8.26 KB )
  15. /data/web/baijiao_branch_collect/vendor/symfony/polyfill-mbstring/bootstrap80.php ( 9.78 KB )
  16. /data/web/baijiao_branch_collect/vendor/symfony/var-dumper/Resources/functions/dump.php ( 1.49 KB )
  17. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/App.php ( 15.30 KB )
  18. /data/web/baijiao_branch_collect/vendor/topthink/think-container/src/Container.php ( 15.76 KB )
  19. /data/web/baijiao_branch_collect/vendor/psr/container/src/ContainerInterface.php ( 1.02 KB )
  20. /data/web/baijiao_branch_collect/app/provider.php ( 0.19 KB )
  21. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Http.php ( 6.04 KB )
  22. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/helper/Str.php ( 7.29 KB )
  23. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Env.php ( 4.68 KB )
  24. /data/web/baijiao_branch_collect/app/common.php ( 10.83 KB )
  25. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/helper.php ( 18.78 KB )
  26. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Config.php ( 5.54 KB )
  27. /data/web/baijiao_branch_collect/config/app.php ( 1.29 KB )
  28. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Env.php ( 1.67 KB )
  29. /data/web/baijiao_branch_collect/config/cache.php ( 1.22 KB )
  30. /data/web/baijiao_branch_collect/config/config.php ( 0.26 KB )
  31. /data/web/baijiao_branch_collect/config/console.php ( 0.29 KB )
  32. /data/web/baijiao_branch_collect/config/cookie.php ( 0.56 KB )
  33. /data/web/baijiao_branch_collect/config/database.php ( 2.29 KB )
  34. /data/web/baijiao_branch_collect/config/filesystem.php ( 0.63 KB )
  35. /data/web/baijiao_branch_collect/config/lang.php ( 0.81 KB )
  36. /data/web/baijiao_branch_collect/config/log.php ( 1.37 KB )
  37. /data/web/baijiao_branch_collect/config/middleware.php ( 0.19 KB )
  38. /data/web/baijiao_branch_collect/config/route.php ( 1.54 KB )
  39. /data/web/baijiao_branch_collect/config/session.php ( 0.57 KB )
  40. /data/web/baijiao_branch_collect/config/trace.php ( 0.34 KB )
  41. /data/web/baijiao_branch_collect/config/view.php ( 0.81 KB )
  42. /data/web/baijiao_branch_collect/app/event.php ( 0.25 KB )
  43. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Event.php ( 7.67 KB )
  44. /data/web/baijiao_branch_collect/app/service.php ( 0.13 KB )
  45. /data/web/baijiao_branch_collect/app/AppService.php ( 0.26 KB )
  46. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Service.php ( 1.64 KB )
  47. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Lang.php ( 7.35 KB )
  48. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/lang/zh-cn.php ( 13.70 KB )
  49. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/initializer/Error.php ( 3.31 KB )
  50. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/initializer/RegisterService.php ( 1.33 KB )
  51. /data/web/baijiao_branch_collect/vendor/services.php ( 0.14 KB )
  52. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/service/PaginatorService.php ( 1.52 KB )
  53. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/service/ValidateService.php ( 0.99 KB )
  54. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/service/ModelService.php ( 2.04 KB )
  55. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/Service.php ( 0.77 KB )
  56. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Middleware.php ( 6.72 KB )
  57. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/initializer/BootService.php ( 0.77 KB )
  58. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/Paginator.php ( 11.86 KB )
  59. /data/web/baijiao_branch_collect/vendor/topthink/think-validate/src/Validate.php ( 63.20 KB )
  60. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/Model.php ( 23.55 KB )
  61. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/Attribute.php ( 21.05 KB )
  62. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/AutoWriteData.php ( 4.20 KB )
  63. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/Conversion.php ( 6.75 KB )
  64. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/DbConnect.php ( 5.16 KB )
  65. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/ModelEvent.php ( 2.33 KB )
  66. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/concern/RelationShip.php ( 28.30 KB )
  67. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/contract/Arrayable.php ( 0.09 KB )
  68. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/contract/Jsonable.php ( 0.13 KB )
  69. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/model/contract/Modelable.php ( 0.09 KB )
  70. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Db.php ( 2.88 KB )
  71. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/DbManager.php ( 8.52 KB )
  72. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Log.php ( 6.28 KB )
  73. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Manager.php ( 3.92 KB )
  74. /data/web/baijiao_branch_collect/vendor/psr/log/src/LoggerTrait.php ( 2.69 KB )
  75. /data/web/baijiao_branch_collect/vendor/psr/log/src/LoggerInterface.php ( 2.71 KB )
  76. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Cache.php ( 4.92 KB )
  77. /data/web/baijiao_branch_collect/vendor/psr/simple-cache/src/CacheInterface.php ( 4.71 KB )
  78. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/helper/Arr.php ( 17.45 KB )
  79. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/cache/driver/Redis.php ( 6.94 KB )
  80. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/cache/Driver.php ( 9.03 KB )
  81. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/contract/CacheHandlerInterface.php ( 1.99 KB )
  82. /data/web/baijiao_branch_collect/app/Request.php ( 0.09 KB )
  83. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Request.php ( 55.78 KB )
  84. /data/web/baijiao_branch_collect/app/middleware.php ( 0.26 KB )
  85. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Pipeline.php ( 2.61 KB )
  86. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/TraceDebug.php ( 3.40 KB )
  87. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Route.php ( 23.73 KB )
  88. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/RuleName.php ( 5.75 KB )
  89. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Domain.php ( 2.53 KB )
  90. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/RuleGroup.php ( 22.43 KB )
  91. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Rule.php ( 26.95 KB )
  92. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/RuleItem.php ( 9.78 KB )
  93. /data/web/baijiao_branch_collect/route/app.php ( 3.05 KB )
  94. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Route.php ( 4.70 KB )
  95. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/dispatch/Controller.php ( 4.74 KB )
  96. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Dispatch.php ( 10.44 KB )
  97. /data/web/baijiao_branch_collect/app/controller/Index.php ( 33.26 KB )
  98. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Request.php ( 9.20 KB )
  99. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/route/Url.php ( 14.07 KB )
  100. /data/web/baijiao_branch_collect/app/model/IndexModel.php ( 19.95 KB )
  101. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Config.php ( 1.37 KB )
  102. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/facade/Cache.php ( 2.06 KB )
  103. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/facade/Db.php ( 0.93 KB )
  104. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/connector/Mysql.php ( 5.73 KB )
  105. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/PDOConnection.php ( 53.74 KB )
  106. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/Connection.php ( 8.39 KB )
  107. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/ConnectionInterface.php ( 4.57 KB )
  108. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/builder/Mysql.php ( 16.58 KB )
  109. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/Builder.php ( 24.07 KB )
  110. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/BaseBuilder.php ( 27.50 KB )
  111. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/Query.php ( 15.97 KB )
  112. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/BaseQuery.php ( 45.13 KB )
  113. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/TimeFieldQuery.php ( 7.43 KB )
  114. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/AggregateQuery.php ( 3.26 KB )
  115. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/ModelRelationQuery.php ( 20.07 KB )
  116. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/ParamsBind.php ( 3.66 KB )
  117. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/ResultOperation.php ( 7.01 KB )
  118. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/WhereQuery.php ( 19.37 KB )
  119. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/JoinAndViewQuery.php ( 7.11 KB )
  120. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/TableFieldInfo.php ( 2.63 KB )
  121. /data/web/baijiao_branch_collect/vendor/topthink/think-orm/src/db/concern/Transaction.php ( 2.77 KB )
  122. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/log/driver/File.php ( 5.96 KB )
  123. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/contract/LogHandlerInterface.php ( 0.86 KB )
  124. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/log/Channel.php ( 3.89 KB )
  125. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/event/LogRecord.php ( 1.02 KB )
  126. /data/web/baijiao_branch_collect/vendor/topthink/think-helper/src/Collection.php ( 16.47 KB )
  127. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Response.php ( 8.81 KB )
  128. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/response/View.php ( 3.29 KB )
  129. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/Cookie.php ( 6.06 KB )
  130. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/View.php ( 4.39 KB )
  131. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/view/driver/Php.php ( 6.44 KB )
  132. /data/web/baijiao_branch_collect/vendor/topthink/framework/src/think/contract/TemplateHandlerInterface.php ( 1.60 KB )
  133. /data/web/baijiao_branch_collect/view/index/pc/school_course_details.php ( 6.12 KB )
  134. /data/web/baijiao_branch_collect/view/index/pc/school_top.php ( 5.76 KB )
  135. /data/web/baijiao_branch_collect/view/index/pc/school_bottom.php ( 1.16 KB )
  136. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000297s ] mysql:host=127.0.0.1;port=3306;dbname=baijiao_branch_collect;charset=utf8
  2. SHOW FULL COLUMNS FROM `fqi_school` [ RunTime:0.001134s ]
  3. SELECT * FROM `fqi_school` WHERE `school_id` = '2115' AND `site_id` = 14 AND `school_status` = 1 LIMIT 1 [ RunTime:0.000286s ]
  4. SHOW FULL COLUMNS FROM `fqi_school_class` [ RunTime:0.000792s ]
  5. SELECT * FROM `fqi_school_class` WHERE `school_id` = 2115 [ RunTime:0.000313s ]
  6. SHOW FULL COLUMNS FROM `fqi_school_campus` [ RunTime:0.000829s ]
  7. SELECT * FROM `fqi_school_campus` WHERE `school_id` = 2115 [ RunTime:0.000332s ]
  8. SHOW FULL COLUMNS FROM `fqi_school_course` [ RunTime:0.000944s ]
  9. SELECT `a`.*,`content` FROM `fqi_school_course` `a` LEFT JOIN `fqi_school_course_content` `b` ON `b`.`content_id`=`a`.`content_id` WHERE `school_id` = 2115 AND `a`.`content_id` = '31316' AND `course_status` = 1 AND `school_status` = 1 LIMIT 1 [ RunTime:0.000920s ]
  10. (select content_id,course_name from fqi_school_course where school_id = '2115' and content_id < '31316' and site_id = '14' order by content_id desc limit 1) union all(select content_id,course_name from fqi_school_course where school_id = '2115' and content_id > '31316' and site_id <= '14' order by content_id asc limit 1) [ RunTime:0.001140s ]
  11. SELECT * FROM `fqi_school_course` WHERE `school_id` = 2115 AND `site_id` = 14 AND `course_status` = 1 AND `school_status` = 1 AND `school_class_id` = 8444 ORDER BY `course_id` DESC LIMIT 4 [ RunTime:0.000498s ]
  12. SELECT * FROM `fqi_school_course` WHERE `school_id` = 2115 AND `site_id` = 14 AND `course_status` = 1 AND `school_status` = 1 ORDER BY `course_id` DESC LIMIT 10 [ RunTime:0.000276s ]
  13. SELECT COUNT(*) AS think_count FROM `fqi_school_course` WHERE `school_id` = 2115 AND `course_status` = 1 [ RunTime:0.000203s ]
  14. SHOW FULL COLUMNS FROM `fqi_school_teacher` [ RunTime:0.000780s ]
  15. SELECT COUNT(*) AS think_count FROM `fqi_school_teacher` WHERE `school_id` = '2115' [ RunTime:0.000253s ]
  16. SHOW FULL COLUMNS FROM `fqi_school_comments` [ RunTime:0.000717s ]
  17. SELECT COUNT(*) AS think_count FROM `fqi_school_comments` WHERE `school_id` = '2115' [ RunTime:0.000266s ]
  18. SELECT `content_id`,`course_name`,`a`.`school_id`,`b`.`school_name` FROM `fqi_school_course` `a` LEFT JOIN `fqi_school` `b` ON `b`.`school_id`=`a`.`school_id` WHERE `a`.`site_id` = '14' AND `b`.`school_status` = '1' AND `course_status` = 1 AND `course_id` < '31316' ORDER BY `content_id` DESC LIMIT 20 [ RunTime:0.078600s ]
0.093357s