1、UNIX時(shí)間戳轉換為日期用函數： FROM_UNIXTIME()

select FROM_UNIXTIME(1156219870);

2、日期轉換為UNIX時(shí)間戳用函數： UNIX_TIMESTAMP()

Select UNIX_TIMESTAMP('2006-11-04 12:23:00′);

3、日期時(shí)間格式函數：DATE_FORMAT() 

例：mysql查詢(xún)當天的記錄數：

$sql="select * from message Where DATE_FORMAT(FROM_UNIXTIME(chattime),'%Y-%m-%d') = DATE_FORMAT(NOW(),'%Y-%m-%d') order by id desc";

當然大家也可以選擇在PHP中進(jìn)行轉換UNIX時(shí)間戳轉換為日期用函數： date()

date("Y-m-d H:i:s", 1156219870);

日期轉換為UNIX時(shí)間戳用函數：strtotime()

strtotime("2010-03-24 08:15:42");

實(shí)例：

/*

周五 0點(diǎn)至12點(diǎn) 注冊醫生信息（id,姓名、醫院、科室、職稱(chēng)）

*/

select unix_timestamp("2011-09-02 00:00:00"),unix_timestamp("2011-09-02 12:00:00");

select us.uid as "ID",us.username as "用戶(hù)名",usf.workunit as "所在醫院",usf.jobtitle as "職稱(chēng)",usf.kee as "一級科室",usf.keee as "二級科室",usf.keeee as "三級科室" from uchome_space us,uchome_spacefield usf where us.uid=usf.uid   and dateline between unix_timestamp("2011-09-02 00:00:00") and unix_timestamp("2011-09-02 12:00:00") and workunit !="" order by dateline desc;