1. FIELDS TERMINATED BY在Hive中的含义 FIELDS TERMINATED BY 是Hive SQL中的一个选项,用于指定在创建表或加载数据时,字段之间的分隔符。Hive默认使用制表符(\t)作为字段分隔符,但可以通过FIELDS TERMINATED BY来指定其他字符作为分隔符。 2. FIELDS TERMINATED BY在Hive数据加载过程中的作用 在数据加载过程中,Hive...
关键字ROW FORMAT DELIMITED 指定表的分隔符,通常后面要与以下关键字连用: FIELDS TERMINATED BY ‘,’ //指定每行中字段分隔符为逗号 LINES TERMINATED BY ‘\n’ //指定行分隔符 COLLECTION ITEMS TERMINATED BY ‘,’ //指定集合中元素之间的分隔符 MAP KEYS TERMINATED BY ‘:’ //指定数据中Map类型的Key...
COMMENT 'Employee details' ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' LINES TERMINATED BY ' ' STORED AS TEXTFILE; 错误输出: FAILED: Parse Error: line 8:0 cannot recognize input near 'FIELDS' 'TERMINATED' BY in column specification 解决方案: 确保关键字之间有空格,语法正确。 2. 权限问题 如...
create table student_local(num int,name string,sex string,age int,dept string) row format delimited fields terminated by ','; --建表student_HDFS 用于演示从HDFS加载数据 create external table student_HDFS(num int,name string,sex string,age int,dept string) row format delimited fields terminated ...
MAP KEYS TERMINATED BY ‘:’ //指定数据中Map类型的Key与Value之间的分隔符 举个例子: create table score(name string, score map<string,int>) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘\t’ COLLECTION ITEMS TERMINATED BY ‘,’ MAP KEYS TERMINATED BY ‘:'; ...
row format delimited fields terminated by ',' stored as orc 1. 2. 3. 4. 5. 6. 7. 4.补充: hive建表语法中的分隔符设定 ROW FORMAT DELIMITED 分隔符设置开始语句 FIELDS TERMINATED BY:设置字段与字段之间的分隔符 COLLECTION ITEMS TERMINATED BY:设置一个复杂类型(array,struct)字段的各个item之间的...
PARTITIONED BY (`day` string) row format delimited fields terminated by '\t' LINES TERMINATED BY '\n' STORED AS textfile; 2.通过sqoop导数据进来,指定分隔符为\t sqoop import \ --mapreduce-job-name sqoop_table_xxx \ --hive-drop-import-delims \ ...
FIELDS TERMINATED BY "|#" 来限定数据中各个字段的分隔符,这种方式只支持单个分隔符,即:实际只会按照"|"进行分割,若想实现支持多分隔符,有如下方式: hive从0.14版本以后支持MultiDelimitSerDe,可以比较优雅多解决多分隔符问题 ROWFORMAT SERDE'org.apache.hadoop.hive.contrib.serde2.MultiDelimitSerDe'WITHSERDE...
create tableifnot existsrcfile_table(ueseridSTRING,movieidSTRING,ratingSTRING,tsSTRING)row format delimited fields terminated by'\t'storedasrcfile; 在存储空间上: RCFile 是行划分,列存储,采用游程编码,相同的数据不会重复存储,很大程度上节约了存储空间,尤其是字段中包含大量重复数据的时候。
LINES TERMINATED BY '\n' 行按回车符来分割,默认,一般不写 location '/user/hdfs/source/hive_test' 表示这个外部表的数据时放在这个目录下面 代码语言:javascript 复制 CREATEEXTERNALTABLEIFNOTEXISTSmy_hive(idINT,nameSTRING)row format delimited fields terminated by','LINESTERMINATEDBY'\n'storedastextfile...