T1:
IDT1 NAME AGE
1 RAM 20
2 SAM 21
3 JAM 22
(IDT1是PK到表T1和外键到T2和T3并且CASCADE DELETE ON)
T2:
ID NAME GEN IDT1
1 AB M 1
2 CD M 2
T3:
ID NAME PLACE IDT1
1 LL KOL 1
2 MM LOK 2
问题:如果我从T1删除IDT1 = 2,那么从T2开始IDT1 = 2,T3也将按照级联删除删除..但是我想知道哪一行(T2或T3) ' S IDT1 = 2)将首先被删除..