How do I insert multiple values into a postgres table at once? - postgresql

Question

I have a table that I am trying to update multiple values at once. Here is the table schema:
Column | Type | Modifiers
---------------+---------+-----------
user_id | integer |
subservice_id | integer |
I have the user_id and want to insert multiple subservice_id's at once. Is there a syntax in Postgres that will let me do something like this
insert into user_subservices(user_id, subservice_id) values(1, [1, 2, 3]);
How would I do this?

Answer 1

Multi-value insert syntax is:
insert into table values (1,1), (1,2), (1,3), (2,1);
But krokodilko's answer is much slicker.

Answer 2

Try:
INSERT INTO user_subservices(user_id, subservice_id)
SELECT 1 id, x
FROM unnest(ARRAY[1,2,3,4,5,6,7,8,22,33]) x
Demo: http://www.sqlfiddle.com/#!15/9a006/1

Answer 3

A shorter version of krokodilko's answer:
insert into user_subservices(user_id, subservice_id)
values(1, unnest(array[1, 2, 3]));

Answer 4

A slightly related answer because I keep finding this question every time I try to remember this solution. Insert multiple rows with multiple columns:
insert into user_subservices (user_id, subservice_id)
select *
from unnest(array[1, 2], array[3, 4]);

Answer 5

More robust example, for when you need to insert multiple rows into some table for every row in another table:
INSERT INTO user_subservices (user_id, subservice_id)
SELECT users.id AS user_id, subservice_id
FROM users
CROSS JOIN unnest(ARRAY[1,2,3]) subservice_id;

Answer 6

For multiple values, this function might be helpful.
This function generates multiple values
const _multiInsert = arrOfValues => {
// removes lastCharacter
const _remLastChar = str => str.slice(0, str.length - 1);
let foramttedQuery = '';
arrOfValues.forEach(row => {
let newRow = '';
for (const val of Object.values(row)) {
let newValue = '';
if (typeof val === 'string') newValue = `'${val}',`;
else newValue = `${val},`;
newRow = newRow.concat(newValue);
}
foramttedQuery = foramttedQuery.concat(`(${_remLastChar(newRow)}),`);
});
return _remLastChar(foramttedQuery);
};
const arr_Of_Values = [
{
id: 1,
name: "SAMPLE_NAME_1",
},
{
id: 2,
name: "SAMPLE_NAME2",
}
]
const query_template = `INSERT INTO TABLE_NAME VALUES ${_multiInsert(arr_Of_Values)}`
console.log(query_template)