先創建兩個表tb1,tb2。其中，tb1爲主表，tb2爲子表。
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)
);
下面語句通過主表ID刪除，在刪除主表數據的時候，跟主表外鍵關聯的子表數據也會相應的刪除。
delete t1,t2 from tb2 t2,tb1 t1 where t1.weeklyNo=t2.weeklyNo and t1.weeklyNo='1';
附上週報數據庫設計表
weekly爲主表，weeklyContent爲附屬子表
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';