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Spark SQL Guide

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 ] ]
    { { VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ] } | query }

Parameters

table_identifier
Specifies a table name, which may be optionally qualified with a database name.

Syntax: [ database_name. ] table_name
partition_spec
An optional parameter that specifies a comma separated list of key and value pairs for partitions.

Syntax: PARTITION ( partition_col_name [ = partition_col_val ] [ , ... ] )
VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ]
Specifies the values to be inserted. Either an explicitly specified value or a NULL can be inserted. A comma must be used to separate each value in the clause. More than one set of values can be specified to insert multiple rows.
query
A query that produces the rows to be inserted. It can be in one of following formats:
  • a SELECT statement
  • a TABLE statement
  • a FROM statement

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, Melo 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, Melo 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, Melo 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         |
     + -------------- + ------------------------------ + -------------- +