Detailed description of formatting dates in mysql and detailed description of mysql dates

Detailed description of formatting dates in mysql and detailed description of mysql dates

1. the DATE_FORMAT () function is used to display date/time data in different formats.

DATE_FORMAT(date,format) 

The format of the format parameter is

%	Abbreviated name of a week
% B	Abbreviated month name
% C	Month, Value
% D	Day of the month with an English prefix
% D	Day of the month, numeric value (00-31)
% E	Day of the month, value (0-31)
% F	Microseconds
% H	Hour (00-23)
% H	Hour (01-12)
% I	Hour (01-12)
% I	Minute, value (00-59)
% J	Day of the year (001-366)
% K	Hour (0-23)
% L	Hour (1-12)
% M	Month name
% M	Month, value (00-12)
% P	AM or PM
% R	Time, 12-hour (hh: mm: ss AM or PM)
% S	Seconds (00-59)
% S	Seconds (00-59)
% T	Time, 24-hour (hh: mm: ss)
% U	Week (00-53) Sunday is the first day of the week
% U	Week (00-53) Monday is the first day of the week
% V	Week (01-53) Sunday is the first day of the week, used with % X
% V	Week (01-53) Monday is the first day of the week, used with % x
% W	Week name
% W	Day of the week (0 = Sunday, 6 = Saturday)
% X	Year, where Sunday is the first day of the week, four digits, used with % V
% X	Year, where Monday is the first day of the week, 4 digits, used with % v
% Y	Year, 4 digits
% Y	Year, two places

Example:

DATE_FORMAT(NOW(),'%b %d %Y %h:%i %p') DATE_FORMAT(NOW(),'%m-%d-%Y') DATE_FORMAT(NOW(),'%d %b %y') DATE_FORMAT(NOW(),'%d %b %Y %T:%f') 

Output result:

Dec 29 2008 11:45 PM 12-29-2008 29 Dec 08 29 Dec 2008 16:25:46 

2. MySQL Formatting Function FROM_UNIXTIME ()

SELECT FROM_UNIXTIME(date, '%Y-%c-%d %h:%i:%s' ) as post_date , date_format(NOW(), '%Y-%c-%d %h:%i:%s' ) as post_date_gmt FROM `article` where outkey = 'Y' 

1. FROM_UNIXTIME (unix_timestamp)

Parameter: usually 10-bit timestamp, for example: 1417363200

Returned value: there are two types, which may be strings like 'yyyy-MM-DD HH: MM: ss' or similarYYYYMMDDHHMMSS.uuuuuu The specific returned result of such a number depends on the form of the function being called.

mysql> select FROM_UNIXTIME(1344887103); +---------------------------+ | FROM_UNIXTIME(1344887103) | +---------------------------+ | 2012-08-14 03:45:03  | +---------------------------+ 1 row in set (0.00 sec) 

2. FROM_UNIXTIME (unix_timestamp, format)

Unix_timestamp: And MethodFROM_UNIXTIME( unix_timestamp ) The parameter meanings are the same;

Format: the format of the converted time string;

Returned value: A string displayed in the specified time format;

mysql> select FROM_UNIXTIME(1344887103,'%Y-%M-%D %h:%i:%s'); +-----------------------------------------------+ | FROM_UNIXTIME(1344887103,'%Y-%M-%D %h:%i:%s') | +-----------------------------------------------+ | 2012-August-14th 03:45:03      | +-----------------------------------------------+ 1 row in set (0.00 sec) mysql> select FROM_UNIXTIME(1344887103,'%Y-%m-%D %h:%i:%s'); +-----------------------------------------------+ | FROM_UNIXTIME(1344887103,'%Y-%m-%D %h:%i:%s') | +-----------------------------------------------+ | 2012-08-14th 03:45:03       | +-----------------------------------------------+  1 row in set (0.00 sec) 

3. Determine whether the day is the same:

SELECT tbl_gamedata.GameMapName,tbl_playerdata.GameMode, tbl_gamedata.MatchMode, tbl_playerdata.GameResult, SUM(tbl_playerdata.GameIsWin) AS tday_winCount,    SUM(tbl_playerdata.AssistCount) AS tday_assistCount,SUM(tbl_playerdata.KillCount) AS tday_killCount,   SUM(tbl_player_title.ThreeKill) AS tday_threeKill,SUM(tbl_player_title.FourKill) AS tday_fourKill,SUM(tbl_player_title.FiveKill) AS tday_fiveKill FROM tbl_playerdata   LEFT JOIN tbl_gamedata ON tbl_playerdata.GameID = tbl_gamedata.GameID  LEFT JOIN tbl_player_title ON tbl_player_title.GameID = tbl_playerdata.GameID AND tbl_player_title.PlayerID = tbl_playerdata.PlayerID WHERE tbl_playerdata.PlayerID = user_id AND (tbl_playerdata.GameResult = 2 OR tbl_playerdata.GameResult = 3) AND TO_DAYS(FROM_UNIXTIME(tbl_playerdata.GameStartTime)) = TO_DAYS(NOW())  GROUP BY tbl_gamedata.GameMapName, tbl_playerdata.GameMode,tbl_gamedata.MatchMode,tbl_playerdata.GameResult;

WhereTO_DAYS(FROM_UNIXTIME(tbl_playerdata.GameStartTime)) = TO_DAYS(NOW()) Is the judgment we need

Summary

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