what will be faster?
SELECT * FROM
or
SELECT specified FROM
background: table have one field (specified) which at the same time is a primary index
what will be faster? SELECT * FROM or SELECT specified FROM background: table have
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what will be faster?
SELECT * FROM
or
SELECT specified FROM
background: table have one field (specified) which at the same time is a primary index
In your particular case it may very well be the same, but as a matter of good practice, you should always specify the columns you want.
In addition to the various good reasons Dark Falcon put in a comment, it also creates a form of self-documentation in your application code, since it’s directly in the query each field you’re expecting.