School Commit Init

Anul 2/Semestrul 2/DBMS/Lab 3 Gwent/DirtyReads1.sql

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+create or alter procedure write_and_rollback
+as
+begin
+	begin tran
+	update Cards set name = 'Test Dirty Reads' where hmy = 1
+	waitfor delay '00:00:05'
+	rollback tran
+end
+go
+
+create or alter procedure read_multiple_times
+as
+begin
+	begin tran
+	select * from Cards where hmy = 1
+	waitfor delay '00:00:05'
+	select * from Cards where hmy = 1
+	waitfor delay '00:00:05'
+	select * from Cards where hmy = 1
+	commit tran
+end
+go
+
+set transaction isolation level read uncommitted
+
+exec read_multiple_times