ROLLBACK TRANSACTION 请求没有对应的BEGIN TRANSACTION，但是还是报错

Question

Simple query: Before the UPDATE, the value of EffectiveStartDt is NULL After the UPDATE and the ROLLBACK, I want it to go back to NULL

begin tran t1
update MasterPayor 
set EffectiveStartDt = '2020-09-17' 
where MasterPayorId = 1
commit

rollback tran t1

I have defined the transactions, but I'm still getting the Rollback error

Answer 1

The COMMIT commits the update to the Database and clears the transaction begun with the matching BEGIN TRAN , hence the error when you try to rollback. If you want to ROLLBACK use the ROLLBACK without the COMMIT:

begin tran t1
update MasterPayor 
set EffectiveStartDt = '2020-09-17' 
where MasterPayorId = 1

rollback tran t1