CODEWITHSUNDEEP
sqlinserthadoophive
Tapan Avasthi
Tapan Avasthi

Reputation: 425

Inserting Data into Hive Table

I am new to hive. I have successfully setup a single node hadoop cluster for development purpose and on top of it, I have installed hive and pig.

I created a dummy table in hive:

create table foo (id int, name string);

Now, I want to insert data into this table. Can I add data just like sql one record at a time? kindly help me with an analogous command to:

insert into foo (id, name) VALUES (12,"xyz);

Also, I have a csv file which contains data in the format:

1,name1
2,name2
..
..

..


1000,name1000

How can I load this data into the dummy table?

Upvotes: 24

Views: 189279

Answers (12)

Rishab
Rishab

Reputation: 67

LOAD DATA [LOCAL] INPATH '' [OVERWRITE] INTO TABLE <table_name>; use this command it will load the data at once just specify the file path if file is in local fs then use LOCAL if file is in hdfs then no need to use local

Upvotes: 0

Rahib
Rahib

Reputation: 512

You can use following lines of code to insert values into an already existing table. Here the table is db_name.table_name having two columns, and I am inserting 'All','done' as a row in the table.

insert into table db_name.table_name
select 'ALL','Done';

Hope this was helpful.

Upvotes: 1

Indrajeet Gour
Indrajeet Gour

Reputation: 4510

Use this -

create table dummy_table_name as select * from source_table_name;

This will create the new table with existing data available on source_table_name.

Upvotes: 0

bignano
bignano

Reputation: 593

to insert ad-hoc value like (12,"xyz), do this:

insert into table foo select * from (select 12,"xyz")a;

Upvotes: 3

sateesh
sateesh

Reputation: 21

this is supported from version hive 0.14

INSERT INTO TABLE pd_temp(dept,make,cost,id,asmb_city,asmb_ct,retail) VALUES('production','thailand',10,99202,'northcarolina','usa',20)

Upvotes: 2

Vijay Kumar
Vijay Kumar

Reputation: 124

You may try this, I have developed a tool to generate hive scripts from a csv file. Following are few examples on how files are generated. Tool -- https://sourceforge.net/projects/csvtohive/?source=directory

  1. Select a CSV file using Browse and set hadoop root directory ex: /user/bigdataproject/

  2. Tool Generates Hadoop script with all csv files and following is a sample of generated Hadoop script to insert csv into Hadoop

    #!/bin/bash -v
    
hadoop fs -put ./AllstarFull.csv /user/bigdataproject/AllstarFull.csv
hive -f ./AllstarFull.hive
    


    hadoop fs -put ./Appearances.csv /user/bigdataproject/Appearances.csv
hive -f ./Appearances.hive
    


    hadoop fs -put ./AwardsManagers.csv /user/bigdataproject/AwardsManagers.csv
hive -f ./AwardsManagers.hive

  3. Sample of generated Hive scripts

    CREATE DATABASE IF NOT EXISTS lahman;
    
USE lahman;
    
CREATE TABLE AllstarFull (playerID string,yearID string,gameNum string,gameID string,teamID string,lgID string,GP string,startingPos string) row format delimited fields terminated by ',' stored as textfile;
    
LOAD DATA INPATH '/user/bigdataproject/AllstarFull.csv' OVERWRITE INTO TABLE AllstarFull;
    
SELECT * FROM AllstarFull;

Thanks Vijay

Upvotes: 1

Ashish Panery
Ashish Panery

Reputation: 1226

It's a limitation of hive.

1.You cannot update data after it is inserted

2.There is no "insert into table values ... " statement

3.You can only load data using bulk load

4.There is not "delete from " command

5.You can only do bulk delete

But you still want to insert record from hive console than you can do select from statck. refer this

Upvotes: 1

Mahesh R
Mahesh R

Reputation: 31

What ever data you have inserted into one text file or log file that can put on one path in hdfs and then write a query as follows in hive

  hive>load data inpath<<specify inputpath>> into table <<tablename>>;

EXAMPLE:

hive>create table foo (id int, name string)
row format delimited
fields terminated by '\t' or '|'or ','
stored as text file;
table created..
    DATA INSERTION::
    hive>load data inpath '/home/hive/foodata.log' into table foo;

Upvotes: 3

user3650393
user3650393

Reputation: 41

Hive apparently supports INSERT...VALUES starting in Hive 0.14.

Please see the section 'Inserting into tables from SQL' at: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DML

Upvotes: 4

MoustafaAAtta
MoustafaAAtta

Reputation: 1081

There's no direct way to insert 1 record at a time from the terminal, however, here's an easy straight forward workaround which I usually use when I want to test something:

Assuming that t is a table with at least 1 record. It doesn't matter what is the type or number of columns.

INSERT INTO TABLE foo
SELECT '12', 'xyz'
FROM t
LIMIT 1;

Upvotes: 8

David Gruzman
David Gruzman

Reputation: 8088

I think the best way is:
a) Copy data into HDFS (if it is not already there)
b) Create external table over your CSV like this

CREATE EXTERNAL TABLE TableName (id int, name string)
ROW FORMAT DELIMITED   
FIELDS TERMINATED BY ',' 
LINES TERMINATED BY '\n'
STORED AS TEXTFILE
LOCATION 'place in HDFS';

c) You can start using TableName already by issuing queries to it.
d) if you want to insert data into other Hive table: 

insert overwrite table finalTable select * from table name;

Upvotes: 29

Olaf
Olaf

Reputation: 6289

Hadoop file system does not support appending data to the existing files. Although, you can load your CSV file into HDFS and tell Hive to treat it as an external table.

Upvotes: 0

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