Сделана 10 лаба

Lab10/Task2.sql

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+/*
+Starts a transaction to read the record of 
+Dominic Gonzalez and update his first name. 
+Second SELECT shows the uncommitted update.
+@@trancount showS the number of open transactions.
+Then the transaction is rolled back and the record read again.
+*/
+
+USE AdventureWorks
+
+BEGIN TRANSACTION
+  SELECT @@trancount AS 'Transaction Count'
+  SELECT FirstName, MiddleName, LastName FROM Person.Contact WHERE ContactID = 7454
+  UPDATE Person.Contact SET FirstName = 'Dom' WHERE ContactID = 7454
+  SELECT FirstName, MiddleName, LastName FROM Person.Contact WHERE ContactID = 7454
+  SELECT @@trancount AS 'Transaction Count'
+-- END TRANSACTION HERE
+ROLLBACK TRANSACTION
+
+  SELECT FirstName, MiddleName, LastName FROM Person.Contact WHERE ContactID = 7454
+  SELECT @@trancount AS 'Transaction Count'