How do I import data into Hive?
Insert into table employee Select * from emp where dno=45; After this you can also trigger the select query to see the loaded rows. You can load data into a hive table using the Load statement in two ways. One is from the local file system to the hive table and the other is from HDFS to the hive table.
Table of Contents
Does Hive support CSV?
Apache Hive is a SQL-like tool for analyzing data in HDFS. Data scientists often want to import data into Hive from existing text files exported from spreadsheets or databases. These file formats often include tab-separated values (TSV), comma-separated values (CSV), plain text, JSON, and others.
Which command will load data from csv file stored in HDFS into Hive table?
Hive LOAD command
Hive LOAD HDFS CSV File Now use the Hive LOAD command to load the file into the table.
How do I import CSV data to Hive table with ORC format?
Upload the CSV file to the Hive ORC table
- Step 1: Sample CSV file. Create a sample CSV file named sample_1.
- Step 2 – Copy CSV to HDFS.
- Step 3 – Create a temporary Hive table and load data.
- Step 4: Verify data.
- Step 5: Create an ORC table.
- Step 6: Copy the data from a temporary table.
- Step 6: Exit.
How do I create a CSV file from a table?
Create a data table from an imported CSV file
- Open the project you want to import a CSV file into.
- Select Data in Project Explorer.
- Click the Create Table from CSV button on the toolbar.
- Fill in the boxes as follows:
- Click Browse to find the CSV file you want to import.
How do I import data from Excel into the Hive table?
Hive does not support EXCEL format directly, so you must convert Excel files to a delimited format file, and then use the upload command to upload the file to Hive (or HDFS).
How do I import a CSV file into Hive without a header?
Step 1: Create table
- CREATE EXTERNAL TABLE IF bdp DOES NOT EXIST. rm_hd_table.
- (u_name STRING,
- BIG IDF,
- CHAIN,
- STRING)
- DELIMITED ROW FORMAT.
- FIELDS TERMINATED BY ‘|’
- STORED AS A TEXT FILE.
How do I import a CSV file from HDFS to Hive?
There is another way to enable this,
- use hadoop hdfs -copyFromLocal to copy the . csv data file from your local computer to somewhere in HDFS, say ‘/path/filename’
- log into the hive console, run the following script to load from the file and convert it to a hive table.
How do I convert a CSV file to HDFS?
2 answers
- move csv file to hadoop sanbox (/home/username) using winscp or cyberduck.
- use the -put command to move the file from the local location to hdfs. hdfs dfs -put /home/username/file.csv /user/data/file.csv.
How do I import a CSV file from HDFS to Hive?
How do I import data from Excel into the Hive table?
How to upload data from CSV to Hive?
Use the following code to create the table in hive. Second, now that your table is created in Hive, let’s load the data in your csv file into the “personal” table in Hive. Lastly, display the contents of your “Personal” table in Hive to check if the data loaded correctly
How do you upload a file to a table in Hive?
Now use Hive’s LOAD command to load the file into the table. Note that after the data is uploaded, the source file will be deleted from the source location and the file will be uploaded to the Hive datastore location or the LOCATION specified when creating a table.
How do I load a CSV file into a table?
Note that after the data is uploaded, the source file will be deleted from the source location and the file will be uploaded to the Hive datastore location or the LOCATION specified when creating a table. Use the SELECT command to get data from a table and confirm that the data loaded successfully without any issues.
How to check if data has been loaded from Hive?
Lastly, display the contents of your “Personal” table in Hive to check if the data loaded correctly. Thanks. if you have a hive setup, you can put the local dataset directly using the hive load command on hdfs/s3. You will need to use the “Local” keyword when writing your load command.