PostgreSQL/Math Functions/round — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 13:45, 26 мая 2010
round(x): Returns x rounded to the nearest whole integer
postgres=#
postgres=# -- round(x): Returns x rounded to the nearest whole integer
postgres=#
postgres=# SELECT round(1.0) AS one,
postgres-# round(1.1) AS "one point one",
postgres-# round(1.5) AS "one point five",
postgres-# round(1.8) AS "one point eight";
one | one point one | one point five | one point eight
-----+---------------+----------------+-----------------
1 | 1 | 2 | 2
(1 row)
postgres=#
round(x, s): Returns the value of x, optionally rounded to s decimal places
postgres=#
postgres=# -- round(x, s): Returns the value of x, optionally rounded to s decimal places
postgres=# SELECT round(1.4949, 1) AS one_digit_scale,
postgres-# round(1.4949, 3) AS three_digit_scale,
postgres-# round(1.4949, 10) AS ten_digit_scale,
postgres-# round(1.4949, 0) AS rounded;
one_digit_scale | three_digit_scale | ten_digit_scale | rounded
-----------------+-------------------+-----------------+---------
1.5 | 1.495 | 1.4949000000 | 1
(1 row)
postgres=#
SELECT round(4, 4)
postgres=# SELECT round(4, 4);
round
--------
4.0000
(1 row)
postgres=#