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  • sql语句获得当日,当周,当月,当季,当年的日期

    今天淘到宝了,收藏: http://www.bubuko.com/infodetail-1446425.html
    话说有一文章表article,存储文章的添加文章的时间是add_time字段,该字段为int(5)类型的,现需要查询今天添加的文章总数并且按照时间从大到小排序,则查询语句如下:
    02     
    03    1    select * from `article` where date_format(from_UNIXTIME(`add_time`),%Y-%m-%d) = date_format(now(),%Y-%m-%d);
    04    或者:
    05     
    06    1    select * from `article` where to_days(date_format(from_UNIXTIME(`add_time`),%Y-%m-%d)) = to_days(now());
    07    假设以上表的add_time字段的存储类型是DATETIME类型或者TIMESTAMP类型,则查询语句也可按如下写法:
    08     
    09    查询今天的信息记录:
    10     
    11    1    select * from `article` where to_days(`add_time`) = to_days(now());
    12    查询昨天的信息记录:
    13     
    14    1    select * from `article` where to_days(now()) – to_days(`add_time`) <= 1;
    15    查询近7天的信息记录:
    16     
    17    1    select * from `article` where date_sub(curdate(), INTERVAL 7 DAY) <= date(`add_time`);
    18    查询近30天的信息记录:
    19     
    20    1    select * from `article` where date_sub(curdate(), INTERVAL 30 DAY) <= date(`add_time`);
    21    查询本月的信息记录:
    22     
    23    1    select * from `article` where date_format(`add_time`, ‘%Y%m) = date_format(curdate() , ‘%Y%m);
    24    查询上一月的信息记录:
    25     
    26    1    select * from `article` where period_diff(date_format(now() , ‘%Y%m) , date_format(`add_time`, ‘%Y%m)) =1;
    27    对上面的SQL语句中的几个函数做一下分析:
    28     
    291)to_days
    30     
    31    就像它的名字一样,它是将具体的某一个日期或时间字符串转换到某一天所对应的unix时间戳,如:
    32     
    33    01   mysql> select  to_days(2010-11-22 14:39:51);     
    34    02    +--------------------------------+                                                       
    35    03   | to_days(2010-11-22 14:39:51) |
    36    04   +--------------------------------+
    37    05   |                         734463 |
    38    06   +--------------------------------+
    39    07   
    40    08   mysql> select  to_days(2010-11-23 14:39:51);
    41    09   +--------------------------------+
    42    10   | to_days(2010-11-23 14:39:51) |
    43    11   +--------------------------------+
    44    12   |                         734464 |
    45    13   +--------------------------------+
    46    可以看出22日与23日的差别就是,转换之后的数增加了1,这个粒度的查询是比较粗糙的,有时可能不能满足我们的查询要求,那么就需要使用细粒度的查询方法str_to_date函数了,下面将分析这个函数的用法。
    47     
    48    提醒:
    49     
    501)to_days() 不用于阳历出现(1582)前的值,原因是当日历改变时,遗失的日期不会被考虑在内。因此对于1582 年之前的日期(或许在其它地区为下一年 ), 该函数的结果实不可靠的。
    51      
    522)MySQL"日期和时间类型"中的规则是将日期中的二位数年份值转化为四位。因此对于1997-10-0797-10-07将被视为同样的日期:
    53     
    54    1    mysql> select to_days(1997-10-07), to_days(97-10-07);
    55    2    
    56    3    -> 729669, 729669
    572)str_to_date
    58     
    59    这个函数可以把字符串时间完全的翻译过来,如:
    60     
    61    1    mysql> select str_to_date("2010-11-23 14:39:51",%Y-%m-%d %H:%i:%s);
    62    2    
    63    3    +--------------------------------------------------------+
    64    4    | str_to_date("2010-11-23 14:39:51",%Y-%m-%d %H:%i:%s) |
    65    5    +--------------------------------------------------------+
    66    6    | 2010-11-23 14:39:51                                    |
    67    7    +--------------------------------------------------------+
    68    具体案例操作如下:
    69     
    70    1    select str_to_date(article.`add_time`,%Y-%m-%d %H:%i:%s)
    71    2    from article
    72    3    where str_to_date(article.`add_time`,%Y-%m-%d %H:%i:%s)>=2012-06-28 08:00:00 and str_to_date(article.`add_time`,%Y-%m-%d %H:%i:%s)<=2012-06-28 09:59:59;
    查询
    今天
    select * from 表名 where to_days(时间字段名) = to_days(now());  
    昨天
     
    SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) – TO_DAYS( 时间字段名) <= 1  
    7天
     
    SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名)  
    近30天
     
    SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(时间字段名) 
    
    本月
     
    SELECT * FROM 表名 WHERE DATE_FORMAT( 时间字段名, ‘%Y%m’ ) = DATE_FORMAT( CURDATE( ) , ‘%Y%m’ )  
    上一月
     
    SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , ‘%Y%m’ ) , date_format( 时间字段名, ‘%Y%m’ ) ) =1  
    同时,再附上 一个 mysql官方的相关document
    
    #查询本季度数据
    select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(now());
    #查询上季度数据
    select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));
    #查询本年数据
    select * from `ht_invoice_information` where YEAR(create_date)=YEAR(NOW());
    #查询上年数据
    select * from `ht_invoice_information` where year(create_date)=year(date_sub(now(),interval 1 year));
     
    查询当前这周的数据 
    SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,%Y-%m-%d)) = YEARWEEK(now());
    查询上周的数据
    SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,%Y-%m-%d)) = YEARWEEK(now())-1;
    查询当前月份的数据
    select name,submittime from enterprise   where date_format(submittime,%Y-%m)=date_format(now(),%Y-%m)
    查询距离当前现在6个月的数据
    select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();
    查询上个月的数据
    select name,submittime from enterprise   where date_format(submittime,%Y-%m)=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),%Y-%m)
    select * from ` user ` where DATE_FORMAT(pudate,  %Y%m  ) = DATE_FORMAT(CURDATE(),  %Y%m  ) ;
    select * from user where WEEKOFYEAR(FROM_UNIXTIME(pudate,%y-%m-%d)) = WEEKOFYEAR(now())
    select * 
    from user 
    where MONTH (FROM_UNIXTIME(pudate,  %y-%m-%d  )) = MONTH (now())
    select * 
    from [ user ] 
    where YEAR (FROM_UNIXTIME(pudate,  %y-%m-%d  )) = YEAR (now())
    and MONTH (FROM_UNIXTIME(pudate,  %y-%m-%d  )) = MONTH (now())
    select * 
    from [ user ] 
    where pudate between 上月最后一天
    and 下月第一天
    where   date(regdate)   =   curdate();
    select   *   from   test   where   year(regdate)=year(now())   and   month(regdate)=month(now())   and   day(regdate)=day(now())
    SELECT date( c_instime ) ,curdate( )
    FROM `t_score`
    WHERE 1
    LIMIT 0 , 30

     

    sql语句获取今天、昨天、近7天、本周、上周、本月、上月、半年数据

    标签:class   style   log   it   使用   la   sp   数据   方法   

    原文:http://www.cnblogs.com/xiaoqian1993/p/5260789.html

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  • 原文地址:https://www.cnblogs.com/yeemi/p/7470158.html
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