What does @ signify in a query expression?
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07-01-2021 - |
Question
What does the @ symbol signify in this sql expression?
update some_table set some_number=(@some_number+1) where some_id=1;
It seems to return the same result as:
update some_table set some_number=some_number+1 where some_id=1;
Solution
@
is the "absolute value" operator.
SELECT @ -1;
?column?
----------
1
(1 row)
It returns the same value for positive numbers.
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