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11 gru 2011 · ALTER TABLE yourtable ADD INDEX date_time (date,time); Given that situation, you can create a query with a WHERE clause that looks like this: WHERE (date >= '2011-12-11' AND time >= '23:00:00') AND (date <= '2011-12-12' AND time < '23:00:00')
24 sty 2017 · CURRENT_DATE and CURRENT_TIMESTAMP returns a date / timestamp (respectively) data type reflecting the current date and time on the client (both have a time component, the timestamp also has fractional seconds).
YEAR ( data ), MONTH ( data ), DAY ( data ) – dokonują ekstraktu z daty, odpowiednio roku, miesiąca oraz dnia. MONTH( '2013-02-12' ) as Miesiac, DAY ( '2013-02-12' ) as Dzien. Najczęściej stosowane funkcje zwracające date i czas systemowy to GETDATE () oraz SYSDATETIME ().
SELECT CURRENT_TIMESTAMP AS CurrentDateTime; PostgreSQL Explanation. In PostgreSQL, the CURRENT_TIMESTAMP function is used to fetch the current date and time. Similar to the MySQL solution, the AS keyword is used to rename the output column as "CurrentDateTime".
1 paź 2024 · Dowiedz się, co to jest SQL CURRENT_TIME, jaką ma składnię i zastosowanie. Wyjaśniamy na przykładzie użycia w BigQuery.
TIMEDIFF() Subtract time. TIMESTAMP() With a single argument, this function returns the date or datetime expression; with two arguments, the sum of the arguments. TIMESTAMPADD() Add an interval to a datetime expression. TIMESTAMPDIFF() Return the difference of two datetime expressions, using the units specified.
This tutorial shows you how to use the SQL CURRENT_TIMESTAMP function to get the current date and time of the database server.
