先创建两个表tb1,tb2。其中，tb1为主表，tb2为子表。
create table tb1
(
weeklyNo varchar(17) primary key,
remark varchar(200)
);
create table tb2
(
timeId varchar(17) primary key,
weeklyNo varchar(17),
foreign key(weeklyNo) references tb1(weeklyNo)
);
下面语句通过主表ID删除，在删除主表数据的时候，跟主表外键关联的子表数据也会相应的删除。
delete t1,t2 from tb2 t2,tb1 t1 where t1.weeklyNo=t2.weeklyNo and t1.weeklyNo='1';
附上周报数据库设计表
weekly为主表，weeklyContent为附属子表
create table weekly
(
weeklyNo varchar(17) primary key,
extraWorkExplain varchar(200),
remark varchar(200),
existQuestion varchar(200),
solveWay varchar(200),
copiedPeople varchar(100),
resportPeople varchar(100),
whichWeek varchar(10),
year varchar(4),
month varchar(2),
day varchar(2),
state bool,
createTime datetime,
adminNo varchar(17),
companyNo varchar(17)
);
create table weeklyContent
(
timeId bigint primary key,
weeklyNo varchar(17),
week varchar(10),
workContentRecord varchar(200),
coopertePeople varchar(100),
ifComplete bool,
unCompleteReason varchar(200),
leaderAdvice varchar(200),
isNextWeekPlan bool,
whichWeek varchar(10),
year varchar(4),
month varchar(2),
day varchar(2),
createTime datetime,
foreign key(weeklyNo) references weekly(weeklyNo)
);
delete t2,t1 from weekly t1, weeklyContent t2 where t1.weeklyNo=t2.weeklyNo and
t1.weeklyNo='1';