3.4 KiB
3.4 KiB
The table value constructor (TVC) uses the VALUES
keyword to specify a set of
row value expressions to construct into a table.
The TVC can be used in the FROM
clause
to build an ad hoc table at query time.
VALUES (row_value_list)[,...n]
Arguments
- row_value_list: Comma-delimited list of column values. Enclose each list in parentheses and separate multiple lists with commas. Each list must have the same number of values and values must be in the same order as columns in the table. Each list must contain a value for each column.
Usage
SELECT
expression[,...n]
FROM
(VALUES (row_value_list)[,...n]) [AS] table_name(column_name[,...n])
[!Note] When using the TVC, the
AS
keyword is optional and implied when naming the table and providing column names.
Examples
Select data from an ad hoc table
SELECT *
FROM
(VALUES ('2023-01-01 12:00:00'::TIMESTAMP, 1.23, 4.56),
('2023-01-01 13:00:00'::TIMESTAMP, 2.46, 8.1),
('2023-01-01 13:00:00'::TIMESTAMP, 4.81, 16.2)
) AS data(time, f1, f2)
time | f1 | f2 |
---|---|---|
2023-01-01T12:00:00Z | 1.23 | 4.56 |
2023-01-01T13:00:00Z | 2.46 | 8.1 |
2023-01-01T13:00:00Z | 4.81 | 16.2 |