Сделана 10 лаба

Lab10/Task4.sql

@@ -0,0 +1,19 @@
+/*
+Read and update a record in the Person.Contact table in the AdventureWorks database.
+*/
+
+USE AdventureWorks
+
+SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
+
+SET lock_timeout 5000
+
+BEGIN TRANSACTION
+  SELECT * FROM Person.Contact WHERE ContactID = 10
+  UPDATE Person.Contact SET FirstName = 'Frances' WHERE ContactID = 6
+-- For the purpose of the exercise, COMMIT TRANSACTION or ROLLBACK TRANSACTION are not used.
+
+SELECT @@spid AS 'SPID'
+-- Use the SPID to identify the connection when using sp_lock.
+
+-- ROLLBACK TRANSACTION