How do I add multiple rows to a table in hive?

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How do I add multiple rows to a table in hive?

1. INSERT INTO TABLE table1 VALUES (151, ‘cash’, ‘lunch’), (152, ‘credit’, ‘lunch’), (153, ‘cash’, ‘dinner’); from this answer it is clear “INSERT…. VALUES” query available after version 0.14.

How do you add a new row in the middle of an existing table?

You can add rows to an existing table in two ways:

  1. Use Edit > Add Row to enter a new row one-at-a-time.
  2. Use File > Import more rows to bring in rows from a file.

Can we insert overwrite hive external table?

In summary the difference between Hive INSERT INTO vs INSERT OVERWRITE, INSERT INTO is used to append the data into Hive tables and partitioned tables and INSERT OVERWRITE is used to remove the existing data from the table and insert the new data.

How do I add a column to an existing table in Hive?

1 Answer. You cannot add a column with a default value in Hive. You have the right syntax for adding the column ALTER TABLE test1 ADD COLUMNS (access_count1 int); , you just need to get rid of default sum(max_count) . No changes to that files backing your table will happen as a result of adding the column.

How to add partition to an existing table in hive?

We can create the partition by giving the table name and partition specification alone in the add partition statement. Lets create the Transaction table with partitioned column as Date and then add the partitions using the Alter table add partition statement. The new partition for the date ‘2019-11-19’ has added in the table Transaction.

Can you add a column with a default value in hive?

You cannot add a column with a default value in Hive. You have the right syntax for adding the column ALTER TABLE test1 ADD COLUMNS (access_count1 int);, you just need to get rid of default sum (max_count).

How does hive handle missing data in table?

Hive handles the “missing” data by interpreting NULL as the value for every cell in that column. So now your have the problem of needing to populate the column. Unfortunately in Hive you essentially need to rewrite the whole table, this time with the column populated. It may be easier to rerun your original query with the new column.

How to create a hive table from a CSV file?

I am new to hadoop ecosystem. I was trying to create hive table from CSV file using the below query.

How to insert data into a hive table?

Different Approaches for Inserting Data into a Hive Table 1 Load data from File/Directory We can load data into a Hive table directly from a file OR from a directory (all the… 2 Insert data into Hive tables from queries We can load result of a query into a Hive table. To insert data into the… 3 Directly insert values More

How to change column name in hive table?

Hive alter command allows you to rename the Hive table. Here is an example for the same: Here is the example to add new column to the existing Hive table. You can change the column name and type of the existing Hive table using Hive alter command You can add new partition or drop the existing partition using Hive alter command

How to alter table structure in Apache Hive?

You can use the Apache Hive ALTER TABLE command to change the structure of an existing table. You can add, modify existing columns in Hive tables. You can rename table and column of existing Hive tables. You can add new column to the table. Rename Hive table column. Add or drop table partition. Add Hadoop archive option to Hive table.

When do you insert a row into a table?

The INSERT statement inserts one or more rows into a table. The INSERT statement is sometimes referred to as an INSERT INTO statement. The following illustrates the INSERT statement that inserts a single row into an existing table.