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中文
  • Common Content for Data Engineering 10.2.2 Service Pack 1
  • 所有产品

目录

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  1. 前言
  2. 转换简介
  3. 转换端口
  4. 转换缓存
  5. 地址验证器转换
  6. 汇总器转换
  7. 关联转换
  8. 离散记录异常转换
  9. 大小写转换器转换
  10. 分类器转换
  11. 比较转换
  12. 合并转换
  13. 数据屏蔽转换
  14. 数据处理器转换
  15. 判定转换
  16. 重复记录异常转换
  17. 表达式转换
  18. 筛选器转换
  19. 层次结构到关系转换
  20. Java 转换
  21. Java 转换 API 引用
  22. Java 表达式
  23. 联接器转换
  24. 键生成器转换
  25. 标签创建器转换
  26. 查找转换
  27. 查找缓存
  28. 动态查找缓存
  29. 匹配转换
  30. 字段分析中的匹配转换
  31. 标识分析中的匹配转换
  32. 合并转换
  33. 规范器转换
  34. 解析器转换
  35. Python 转换
  36. 等级转换
  37. 读取转换
  38. 关系到层次结构转换
  39. REST Web 服务使用者转换
  40. 路由器转换
  41. 序列生成器转换
  42. 排序器转换
  43. SQL 转换
  44. 标准创建器转换
  45. 联合转换
  46. 更新策略转换
  47. Web 服务使用者转换
  48. 解析 Web 服务 SOAP 消息
  49. 生成 Web 服务 SOAP 消息
  50. 加权平均值转换
  51. 写入转换
  52. 转换分隔符

Developer 转换指南

Developer 转换指南

上一个 下一个

查找查询的 SQL 替代

查找查询的 SQL 替代

您可以替代关系查找的查找查询。可以添加 WHERE 子句并在缓存前转换查找数据。
您可以在表名称和列名称中使用预留字和正斜杠。
您可以输入一个查询来完全替代默认查找查询。或则，您可以查看和编辑默认查找查询。默认查找查询包括查找端口、输出端口和返回端口。
使用 SQL 替代时，查询会追加子句 ORDER BY 1。该子句将对数据进行排序，以便可靠地为其他子句提供第一个值和最后一个值。
在 Hive 命令行实用程序中运行以下查询可以手动验证 SQL： 
CREATE VIEW <table name> (<port list>) AS <SQL>
其中：
  • <table name>
     是您选择的名称
  • <port list>
     是源中端口的逗号分隔列表
  • <SQL>
     是要验证的查询