CREATEINDEXidx_date_valueONcalendar(date_value);CREATEINDEXidx_yearONcalendar(year);CREATEINDEXidx_monthONcalendar(month);CREATEINDEXidx_quarterONcalendar(quarter);CREATEINDEXidx_day_of_monthONcalendar(day_of_month);CREATEINDEXidx_day_of_weekONcalendar(day_of_week);CREATEINDEXidx_week_of_yearONcale...
week_of_yearCHAR(2),MONTHCHAR(10), month_of_yearCHAR(2), quarter_of_yearINT,YEARINT,UNIQUEKEY`date` (`date`));SELECT*FROMaa_date; 4.填充数据 # 填充数据INSERTINTOaa_date(date_id, DATE)SELECTnumber, DATE_ADD('2018-01-01', INTERVALnumberDAY)FROMaa_numbersWHEREDATE_ADD('2018-01-01'...
在MySQL中,DATE类型实际上占用了3个字节的存储空间,分别用于存储年份、月份和日期。 创建日期到月的存储字段 在MySQL中,我们可以使用DATE类型来存储完整的日期信息,然后通过查询和处理来获取日期到月的信息。下面是一个创建日期到月存储字段的示例代码: CREATETABLEmy_table(idINT,date_columnDATE,month_columnVARCHAR(...
select * from 表名 where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER)); 12、查询本年数据 select * from 表名 where YEAR(create_date)=YEAR(NOW()); 13、查询上年数据 select * from 表名 where year(create_date)=year(date_sub(now(),interval 1 year)); 14、查询当前这...
DATE(create_time) createTimeFROMrd_track_infoGROUPBYDATE(create_time)ORDERBYDATE(create_time)DESC;/*按周统计*/SELECTcount(id) countNum, WEEK(create_time) createTimeFROMrd_track_infoGROUPBYWEEK(create_time)ORDERBYWEEK(create_time)DESC;/*按月统计*/SELECTcount(id) countNum,MONTH(create_time) cr...
LAST_DAY Return the last day of the month for the argument LOCALTIME(), LOCALTIME Synonym for NOW() LOCALTIMESTAMP, LOCALTIMESTAMP() Synonym for NOW() MAKEDATE() Create a date from the year and day of year MAKETIME() Create time from hour, minute, second MICROSECOND() Return...
LAST_DAY Return the last day of the month for the argument LOCALTIME(), LOCALTIME Synonym for NOW() LOCALTIMESTAMP, LOCALTIMESTAMP() Synonym for NOW() MAKEDATE() Create a date from the year and day of year MAKETIME() Create time from hour, minute, second MICROSECOND() Return...
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 ### 默认情况下, 这个yearweek、WEEK ( 日期...
select created_date,pay_date,timestampdiff(minute,create_date,pay_date)from aok_score_info limit1; timestampdiff函数有三个参数: minute:取值有5个,second表示计算秒级间隔,minute表示计算分钟间隔,hour表示小时间隔,day表示天数间隔,month表示月份间隔,year表示年份间隔。
返回当前日期的函数是( ) A curtime() B adddate() C curnow() D curdate() 19. 以下哪项不属于 DML 操作( ) A insert B update C delete D create 20. SELECT COUNT(SAL) FROM EMP GROUP BY DEPTNO;意思是( ) A 求每个部门中的工资 B 求每个部门中工资的大小 C 求每个部门中工资的...