INSERT OVERWRITE

Description

The INSERT OVERWRITE statement overwrites the existing data in the table using the new values. The inserted rows can be specified by value expressions or result from a query.

Syntax

INSERT OVERWRITE [ TABLE ] table_identifier [ partition_spec [ IF NOT EXISTS ] ] [ ( column_list ) ]
    { VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ] | query }

Parameters

Examples

Insert Using a VALUES Clause

-- Assuming the students table has already been created and populated.
SELECT * FROM students;
+-------------+--------------------------+----------+
|         name|                   address|student_id|
+-------------+--------------------------+----------+
|    Amy Smith|    123 Park Ave, San Jose|    111111|
|    Bob Brown|  456 Taylor St, Cupertino|    222222|
|Cathy Johnson|   789 Race Ave, Palo Alto|    333333|
|Dora Williams|134 Forest Ave, Menlo Park|    444444|
|Fleur Laurent|     345 Copper St, London|    777777|
|Gordon Martin|      779 Lake Ave, Oxford|    888888|
|  Helen Davis| 469 Mission St, San Diego|    999999|
|   Jason Wang|     908 Bird St, Saratoga|    121212|
+-------------+--------------------------+----------+

INSERT OVERWRITE students VALUES
    ('Ashua Hill', '456 Erica Ct, Cupertino', 111111),
    ('Brian Reed', '723 Kern Ave, Palo Alto', 222222);

SELECT * FROM students;
+----------+-----------------------+----------+
|      name|                address|student_id|
+----------+-----------------------+----------+
|Ashua Hill|456 Erica Ct, Cupertino|    111111|
|Brian Reed|723 Kern Ave, Palo Alto|    222222|
+----------+-----------------------+----------+

Insert Using a SELECT Statement

-- Assuming the persons table has already been created and populated.
SELECT * FROM persons;
+-------------+--------------------------+---------+
|         name|                   address|      ssn|
+-------------+--------------------------+---------+
|Dora Williams|134 Forest Ave, Menlo Park|123456789|
+-------------+--------------------------+---------+
|  Eddie Davis|   245 Market St, Milpitas|345678901|
+-------------+--------------------------+---------+

INSERT OVERWRITE students PARTITION (student_id = 222222)
    SELECT name, address FROM persons WHERE name = "Dora Williams";

SELECT * FROM students;
+-------------+--------------------------+----------+
|         name|                   address|student_id|
+-------------+--------------------------+----------+
|   Ashua Hill|   456 Erica Ct, Cupertino|    111111|
+-------------+--------------------------+----------+
|Dora Williams|134 Forest Ave, Menlo Park|    222222|
+-------------+--------------------------+----------+

Insert Using a TABLE Statement

-- Assuming the visiting_students table has already been created and populated.
SELECT * FROM visiting_students;
+-------------+---------------------+----------+
|         name|              address|student_id|
+-------------+---------------------+----------+
|Fleur Laurent|345 Copper St, London|    777777|
+-------------+---------------------+----------+
|Gordon Martin| 779 Lake Ave, Oxford|    888888|
+-------------+---------------------+----------+

INSERT OVERWRITE students TABLE visiting_students;

SELECT * FROM students;
+-------------+---------------------+----------+
|         name|              address|student_id|
+-------------+---------------------+----------+
|Fleur Laurent|345 Copper St, London|    777777|
+-------------+---------------------+----------+
|Gordon Martin| 779 Lake Ave, Oxford|    888888|
+-------------+---------------------+----------+

Insert Using a FROM Statement

-- Assuming the applicants table has already been created and populated.
SELECT * FROM applicants;
+-----------+--------------------------+----------+---------+
|       name|                   address|student_id|qualified|
+-----------+--------------------------+----------+---------+
|Helen Davis| 469 Mission St, San Diego|    999999|     true|
+-----------+--------------------------+----------+---------+
|   Ivy King|367 Leigh Ave, Santa Clara|    101010|    false|
+-----------+--------------------------+----------+---------+
| Jason Wang|     908 Bird St, Saratoga|    121212|     true|
+-----------+--------------------------+----------+---------+

INSERT OVERWRITE students
    FROM applicants SELECT name, address, id applicants WHERE qualified = true;

SELECT * FROM students;
+-----------+-------------------------+----------+
|       name|                  address|student_id|
+-----------+-------------------------+----------+
|Helen Davis|469 Mission St, San Diego|    999999|
+-----------+-------------------------+----------+
| Jason Wang|    908 Bird St, Saratoga|    121212|
+-----------+-------------------------+----------+

Insert with a column list

INSERT OVERWRITE students (address, name, student_id) VALUES
    ('Hangzhou, China', 'Kent Yao', 11215016);

SELECT * FROM students WHERE name = 'Kent Yao';
+---------+----------------------+----------+
|     name|               address|student_id|
+---------+----------------------+----------+
|Kent Yao |       Hangzhou, China|  11215016|
+---------+----------------------+----------+

Insert with both a partition spec and a column list

INSERT OVERWRITE students PARTITION (student_id = 11215016) (address, name) VALUES
    ('Hangzhou, China', 'Kent Yao Jr.');

SELECT * FROM students WHERE student_id = 11215016;
+------------+----------------------+----------+
|        name|               address|student_id|
+------------+----------------------+----------+
|Kent Yao Jr.|       Hangzhou, China|  11215016|
+------------+----------------------+----------+