• 连续10年优秀培训基地
  • 30000+弱电从业人员的选择
  • 六度教育、全方位授课班型

400-888-9073

弱电工程师核心能力全景解析:从技术基础到实践应用的必备技能清单

来源:广州六度教育 时间:04-22

弱电工程师核心能力全景解析:从技术基础到实践应用的必备技能清单

弱电工程师核心能力全景解析:从技术基础到实践应用的必备技能清单

为什么需要系统掌握弱电工程师技能?

在智能建筑、安防监控、智慧园区等领域快速发展的今天,弱电系统作为核心支撑体系,对技术人员的要求已从单一设备操作升级为多维度技术整合能力。无论是安防监控平台搭建、网络系统调试还是工程验收,都需要技术人员具备扎实的理论基础与灵活的实践能力。本文将围绕实际工作场景,拆解弱电工程师需掌握的12项核心技能,为从业者提供可落地的能力提升指南。

弱电工程师工作场景

一、基础技术支撑:数据库与网络管理能力

1. 数据库部署与维护

现代安防监控系统常涉及多平台协同运行,无论是B/S架构的网页管理系统还是C/S架构的客户端软件,服务器端都需要稳定的数据库支持。技术人员需熟练掌握MSSQL、MYSQL等主流数据库的部署流程,包括环境配置、权限设置、数据备份与恢复。例如在大型园区监控项目中,需根据设备数量和数据存储需求,选择合适的数据库类型并优化读写性能,确保平台7×24小时稳定运行。

2. 计算机与网络技术深度应用

硬件层面需熟悉服务器、工作站的硬件配置,能根据项目需求选择合适的CPU、内存和存储方案;软件层面需掌握Windows Server、Linux等主流服务器操作系统的安装与配置,例如通过Linux命令行完成监控平台的环境部署。

网络技术方面,需精通网络通信原理:从子网掩码计算、VLAN划分到NAT转换与DDNS配置,每个环节都可能影响监控视频的传输质量。实际调试中,常遇到广播风暴导致网络阻塞的问题,这就需要技术人员快速定位故障点,通过调整组播策略或优化交换机配置解决问题。此外,现代监控设备普遍集成Web服务器功能,技术人员需熟练使用浏览器完成IPC摄像头、NVR存储设备的参数配置,这要求对HTTP协议和Web服务架构有基础认知。

二、工具与设备:从软件到硬件的操作能力

3. 专业软件应用技巧

Office三件套(Word/Excel/PPT)是方案撰写、数据统计和项目汇报的基础工具,例如用Excel分析监控点位的码流占用情况,用PPT向客户演示系统架构。

Visio和AutoCAD则是方案设计的核心工具:Visio用于绘制系统拓扑图,清晰展示摄像头、存储、解码设备的连接关系;AutoCAD用于读取建筑平面图,准确标注监控点位的安装位置。部分项目还涉及二次开发需求,技术人员需能阅读设备厂商提供的SDK文档,了解主要库文件功能,为后续功能扩展奠定基础。

4. 硬件工具使用与设备认知

尽管网络技术普及,但在设备调试阶段仍需依赖传统工具:万用表用于检测线路电压,确保电源稳定;测线仪用于排查网线故障,快速定位断路或短路点;示波器则可分析视频信号质量,解决图像模糊等问题。

对监控设备的深度认知是核心能力之一:从前端的IPC摄像头、DVS/DVR存储设备,到后端的流媒体服务器、矩阵切换器,每个设备的功能特性、接口类型和参数配置都需烂熟于心。例如NVR的存储容量计算需结合摄像头数量、码流大小和存储天数,这直接关系到项目成本与系统稳定性。

三、规范与实践:确保系统落地的关键能力

5. 行业规范与标准掌握

系统方案落地需严格遵循行业规范,例如GB/T 28181是公共安全视频监控联网系统的核心标准,规定了设备间的通信协议;GB 50394-2007《入侵报警系统工程设计规范》、GB 50395-2007《视频安防监控系统工程设计规范》则对工程设计、施工验收提出了具体要求。技术人员需熟悉这些规范,在方案设计阶段就预留合规接口,避免验收时出现整改问题。

6. 工程技术与施工工艺

工程质量直接影响系统寿命,例如视频线的布线路由需避开强电干扰,否则可能导致图像雪花;摄像头的安装高度和角度需符合监控覆盖要求,避免盲区。技术人员需在施工阶段全程跟进,监督线缆敷设、设备安装等关键环节,确保工艺符合设计标准。

7. 监控专业知识与存储管理

视频成像原理、编码格式(H.264/H.265)、码流控制等知识是解决图像问题的关键。例如当画面出现卡顿,需分析是码流过大导致网络拥堵,还是编码格式不兼容设备性能。

存储系统方面,需掌握NAS(网络附加存储)、SAN(存储区域网络)、IPSAN(IP存储区域网络)的区别与适用场景。例如IPSAN基于IP网络传输,适合中大型监控项目;RAID磁盘阵列的配置(RAID0/RAID1/RAID5)需根据数据重要性选择,关键数据需采用冗余模式确保安全性。

8. 通讯协议与接口调试

弱电系统涉及多种通讯接口,RS232用于短距离设备通信(如键盘控制矩阵),RS485支持多设备联网(如多个摄像头级联),RS422则适用于高速数据传输。技术人员需熟悉不同接口的电气特性,例如RS485采用差分传输,抗干扰能力强,适合长距离布线。此外,Modbus、BACnet等工业协议的应用也需了解,确保不同品牌设备间的兼容通信。

总结:构建系统化能力矩阵

弱电工程师的能力提升是一个持续积累的过程,从基础的数据库操作到复杂的系统联调,从设备认知到规范应用,每个环节都需要理论与实践的结合。建议从业者通过参与实际项目,在调试故障、优化系统的过程中深化理解,同时关注行业新技术(如AI视频分析、5G传输),不断更新知识体系,才能在智能弱电领域保持竞争力。

课程导航
校区导航
基本 文件 流程 错误 SQL 调试
  1. 请求信息 : 2026-04-04 13:37:56 HTTP/1.1 GET : http://www.aabrh.com/s/1655/n/4693.html
  2. 运行时间 : 0.018904s [ 吞吐率:52.90req/s ] 内存消耗:384.15kb 文件加载:137
  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_news_details.php ( 2.39 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_right.php ( 2.17 KB )
  136. /data/web/baijiao_branch_collect/view/index/pc/school_bottom.php ( 1.16 KB )
  137. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000787s ] mysql:host=127.0.0.1;port=3306;dbname=baijiao_branch_collect;charset=utf8
  2. SHOW FULL COLUMNS FROM `fqi_school` [ RunTime:0.001329s ]
  3. SELECT * FROM `fqi_school` WHERE `school_id` = '1655' AND `site_id` = 20 AND `school_status` = 1 LIMIT 1 [ RunTime:0.001721s ]
  4. SHOW FULL COLUMNS FROM `fqi_school_class` [ RunTime:0.000842s ]
  5. SELECT * FROM `fqi_school_class` WHERE `school_id` = 1655 [ RunTime:0.000293s ]
  6. SHOW FULL COLUMNS FROM `fqi_school_campus` [ RunTime:0.001003s ]
  7. SELECT * FROM `fqi_school_campus` WHERE `school_id` = 1655 [ RunTime:0.000303s ]
  8. SHOW FULL COLUMNS FROM `fqi_school_news` [ RunTime:0.000972s ]
  9. SELECT `a`.*,`content` FROM `fqi_school_news` `a` LEFT JOIN `fqi_school_news_content` `b` ON `b`.`content_id`=`a`.`content_id` WHERE `school_id` = 1655 AND `a`.`content_id` = '4693' AND `news_status` = 1 AND `school_status` = 1 LIMIT 1 [ RunTime:0.001189s ]
  10. (select content_id,news_name,school_id from fqi_school_news where school_id = '1655' and content_id < '4693' and site_id <= '20' order by content_id desc limit 1) union all(select content_id,news_name,school_id from fqi_school_news where school_id = '1655' and content_id > '4693' and site_id <= '20' order by content_id asc limit 1) [ RunTime:0.001008s ]
  11. SHOW FULL COLUMNS FROM `fqi_school_course` [ RunTime:0.001132s ]
  12. SELECT * FROM `fqi_school_course` WHERE `school_id` = 1655 AND `site_id` = 20 AND `course_status` = 1 AND `school_status` = 1 ORDER BY `course_id` DESC LIMIT 4 [ RunTime:0.000571s ]
  13. SELECT * FROM `fqi_school_course` WHERE `school_id` = 1655 AND `school_status` = 1 AND `course_status` = 1 ORDER BY `course_id` DESC LIMIT 8 [ RunTime:0.000270s ]
  14. SELECT * FROM `fqi_school_news` WHERE `school_id` = 1655 ORDER BY `click` DESC,`news_id` DESC LIMIT 5 [ RunTime:0.000246s ]
  15. SELECT `content_id`,`news_name`,`a`.`school_id`,`b`.`school_name` FROM `fqi_school_news` `a` LEFT JOIN `fqi_school` `b` ON `b`.`school_id`=`a`.`school_id` WHERE `a`.`site_id` = '20' AND `b`.`school_status` = '1' AND `news_status` = 1 AND `content_id` < 4693 ORDER BY `content_id` DESC LIMIT 20 [ RunTime:0.002074s ]
0.019440s