Hive(七):HQL DML

•       HQL DML 主要涉到对Hive表中数据操作，包含有：load、INSERT、DELETE、EXPORT and IMPORT，详细资料参见：https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DML

目录：

• Loading files into tables
• Inserting data into Hive Tables from queries
• Writing data into the filesystem from queries
• Inserting values into tables from SQL
• Delete
• 应用Demo

 Loading files into tables：

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• 语法：LOAD DATA [LOCAL] INPATH 'filepath' [OVERWRITE] INTO TABLE tablename [PARTITION (partcol1=val1, partcol2=val2 ...)]  
• 示例代码如下：

  #创建表
  CREATE TABLE web_log(viewTime INT, userid BIGINT, url STRING, referrer STRING, ip STRING) 
  ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';
  
  #导入文件数据
  LOAD DATA LOCAL INPATH '/usr/zhu/table.txt'  OVERWRITE INTO TABLE web_log;

  View Code