How do I transfer data from HDFS to hive?

Load Data into Hive Table from HDFS

1. Create a folder on HDFS under /user/cloudera HDFS Path.
2. Move the text file from local file system into newly created folder called javachain.
3. Create Empty table STUDENT in HIVE.
4. Load Data from HDFS path into HIVE TABLE.
5. Select the values in the Hive table.

Which command will load data from csv file stored on HDFS into Hive table we don’t need a copy of an original file )?

LOAD DATA INPATH’ command
When you use ‘LOAD DATA INPATH’ command, the data get MOVED (instead of copy) from data location to location that you specified while creating Hive table.

How do I load data into HDFS?

There are lot’s of ways on how you can ingest data into HDFS, let me try to illustrate them here:

1. hdfs dfs -put – simple way to insert files from local file system to HDFS.
2. HDFS Java API.
3. Sqoop – for bringing data to/from databases.
4. Flume – streaming files, logs.

How do I insert data from one table to another in Hive?

You can insert new data into table by two ways.

1. Load the data of a file into table using load command. LOAD DATA [LOCAL] INPATH ‘filepath’ [OVERWRITE] INTO TABLE tablename.
2. You can insert new data into table by using select query. INSERT INTO table tablename1 select columnlist FROM secondtable;

Which command will load data from csv file stored on HDFS into Hive table?

Use the LOAD DATA command to load the data files like CSV into Hive Managed or External table.

How do I import CSV data into Hive table?

Load CSV file into hive ORC table

1. Step 1: Sample CSV File. Create a sample CSV file named as sample_1.
2. Step 2: Copy CSV to HDFS.
3. Step 3: Create temporary Hive Table and Load data.
4. Step 4: Verify data.
5. Step 5: Create an ORC table.
6. Step 6: Copy data from a temporary table.
7. Step 6: Output.

How do you load data into Hive external table?

​Moving Data from HDFS to Hive Using an External Table

1. Move .CSV data into HDFS:
2. Create an external table.
3. Create the ORC table.
4. Insert the data from the external table to the Hive ORC table.

How is data stored in hive partitioned tables?

Hive organizes tables into partitions. Using partition, it is easy to query a portion of the data. Tables or partitions are sub-divided into buckets, to provide extra structure to the data that may be used for more efficient querying. Bucketing works based on the value of hash function of some column of a table.

Which hive command will load data from an HDFS file directory to the table?

load data inpath command
load data inpath command is use to load data into hive table. ‘LOCAL’ signifies that the input file is on the local file system. If ‘LOCAL’ is omitted then it looks for the file in HDFS. load data inpath ‘/directory-path/file.

How can I use HDFS data in a hive table?

Hive provides a tabular view on top of HDFS data. If your data is in HDFS, then you can create an external table on it to reference the existing data. You will need to put a schema over the data. This is a one time effort and then you can use all the features of Hive to explore and analyze the dataset.

How to load data into table from HDFS?

Let us load Data into table from HDFS by following step by step instructions. Load Data from HDFS path into HIVE TABLE. Select the values in the Hive table.

How to move data from one location to another in hive?

When you use ‘LOAD DATA INPATH’ command, the data get MOVED (instead of copy) from data location to location that you specified while creating Hive table.

What happens if location is not given when creating hive table?

If location is not given when you create Hive table, it uses internal Hive warehouse location and data will get moved from your source data location to internal Hive data warehouse location (i.e. /user/hive/warehouse/).