MYSQL查詢將我的日期字段返回爲unixtimestamps。

Question

SIm新編碼，但我有一個MYSQL查詢返回所需的信息，除了它返回我的日期字段（d.timestart和d.timefinish）作爲unixtimestamps。 我知道我需要使用From Unixtime（），但我不知道如何插入它。

這裏是我的代碼工作正常:)

SELECT g.quiz  AS'Quiz Number', 
     g.userid  AS'User Number', 
     g.grade  AS'Grade Percentage Achieved', 
     u.firstname AS' First Name', 
     u.lastname AS'Last Name', 
     c.name  AS'Assessment Name', 
     d.attempt AS'Number of Attempts', 
     d.state  AS'Assessment Progress', 
     d.timestart AS'Assessment Started', 
     d.timefinish AS'Assessment Finished' 
FROM mdl_quiz_grades g 
     JOIN mdl_user u 
     ON u.id = g.userid 
     JOIN mdl_quiz c 
     ON c.id = g.quiz 
     JOIN mdl_quiz_attempts d 
     ON d.id = g.userid 

感謝加里

Answer 1

你會使用FROM_UNIXTIME：

SELECT g.quiz      AS'Quiz Number', 
     g.userid     AS'User Number', 
     g.grade      AS'Grade Percentage Achieved', 
     u.firstname     AS' First Name', 
     u.lastname     AS'Last Name', 
     c.name      AS'Assessment Name', 
     d.attempt     AS'Number of Attempts', 
     d.state      AS'Assessment Progress', 
     From_unixtime(d.timestart) AS'Assessment Started', 
     From_unixtime(d.timefinish) AS'Assessment Finished' 
FROM mdl_quiz_grades g 
     JOIN mdl_user u 
     ON u.id = g.userid 
     JOIN mdl_quiz c 
     ON c.id = g.quiz 
     JOIN mdl_quiz_attempts d 
     ON d.id = g.userid 

如果您想格式化該日期，你會使用DATE_FORMAT和說明符將其格式從the documentation。

DATE_FORMAT(FROM_UNIXTIME(d.timestart), '%b %d %Y %h:%i %p') AS ... 

Answer 2

在MySQL documentation中有例子。

SELECT g.quiz  AS'Quiz Number', 
     g.userid  AS'User Number', 
     g.grade  AS'Grade Percentage Achieved', 
     u.firstname AS' First Name', 
     u.lastname AS'Last Name', 
     c.name  AS'Assessment Name', 
     d.attempt AS'Number of Attempts', 
     d.state  AS'Assessment Progress', 
     FROM_UNIXTIME(d.timestart) AS'Assessment Started', 
     FROM_UNIXTIME(d.timefinish) AS'Assessment Finished' 
FROM mdl_quiz_grades g 
     JOIN mdl_user u 
     ON u.id = g.userid 
     JOIN mdl_quiz c 
     ON c.id = g.quiz 
     JOIN mdl_quiz_attempts d 
     ON d.id = g.userid 

Answer 3

用於格式化UNIX時間戳，你可以嘗試

SELECT FROM_UNIXTIME(unix_timestamp, '%m/%d/%Y') FROM myTable; 

其中第二部分是格式字符串。

格式化任何類型的日期和時間，你可以嘗試DATE_FORMAT功能，如

SELECT DATE_FORMAT(date, '%m/%d/%Y') FROM myTable;

反正看看
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_from-unixtime
和
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-format