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Editorial Team
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Asked: 2026-06-11T19:43:51+00:00

I need to return a multidimensional array from a query with the id keys

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I need to return a multidimensional array from a query with the id keys named key. (needed for object keys in amazon S3 API)

example:

Array ( [0] => Array ( [key] => 8 ) [1] => Array ( [key] => 7 ) [2] => Array ( [key] => 6 ) )

The problem: key is a reserved name in MySQL. I have to use the name key.

The following query gives an error

SELECT `file_name` AS key FROM (`uploads`)

but adding backticks around key doesn’t give errors

SELECT `file_name` AS `key` FROM (`uploads`)

Is it safe to continue like this or is there a better way? I was thinking to rename the id key in the array in PHP but doing it in the query seems faster

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1 Answer

  1. Editorial Team

    As stated, use backticks.

    From the MYSQL Docs

    Reserved words are permitted as identifiers if you quote them as described in Section 9.2, “Schema Object Names”:

    mysql> CREATE TABLE interval (begin INT, end INT);
ERROR 1064 (42000): You have an error in your SQL syntax ...
near 'interval (begin INT, end INT)'

mysql> CREATE TABLE `interval` (begin INT, end INT);
Query OK, 0 rows affected (0.01 sec)
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