mysql操作记事本

MYsql 触发器更新

create trigger trigger1 
  after update on boxinfo_lida2024_66064f814e7f9 for each row 
  update switch_boxids 
  set box_status=NEW.box_status,original_info=NEW.original_data 
  where box_id = NEW.box_id; 

查看触发器 Show Triggers;
删除触发器 DROP TRigger XXX;

其他触发器样例

CREATE TRIGGER t2
AFTER
INSERT
ON ord
FOR EACH ROW

 UPDATE goods SET num=num-new.much WHERE gid=new.gid;

 
 
CREATE TRIGGER t3
AFTER
DELETE
ON ord
FOR EACH ROW

 UPDATE goods SET num=num+old.much WHERE gid=old.gid;

 ///更新前操作
CREATE TRIGGER t4
BEFORE
UPDATE
ON ord
FOR EACH ROW

 UPDATE goods SET num=num+old.much-new.much WHERE gid = 1;

批量修改时间

UPDATE hl_box68 set land_time = ADDTIME(DATE('2024-01-10') + interval 0 hour,time(land_time)) ORDER BY id desc limit 228

某个时间范围

select * from 表名 where 时间字段 BETWEEN '开始时间' AND '结束时间';

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;

一周（7天）

SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名);

一月（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' );

上个月

SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( 时间字段名, '%Y%m' ) ) =1;

查询本季度数据

select * from 表名 where QUARTER(create_date)=QUARTER(now());

查询上季度数据

select * from 表名 where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));

查询本年数据

select * from 表名 where YEAR(create_date)=YEAR(NOW());

查询上年数据

select * from 表名 where year(create_date)=year(date_sub(now(),interval 1 year));

查询当前这周的数据

SELECT name,submittime FROM 表名 WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now());

查询上周数据

SELECT name,submittime FROM 表名 WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1;

查询上个月数据

select name,submittime from 表名 where date_format(submittime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m');
select * from 表名 where DATE_FORMAT(pudate,'%Y%m') = DATE_FORMAT(CURDATE(),'%Y%m') ; 
select * from 表名 where WEEKOFYEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = WEEKOFYEAR(now());
select * from 表名 where MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now()); 
select * from 表名 where pudate between  上月最后一天  and 下月第一天; 

查询当前月份的数据

select name,submittime from 表名 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 表名 where submittime between date_sub(now(),interval 6 month) and now()