@@ -222,30 +222,57 @@ SET NOCOUNT, XACT_ABORT ON;
222222
223223BEGIN TRANSACTION;
224224
225- CREATE TABLE # Update (FirstName varchar(50) NOT NULL, LastName varchar(50) NOT NULL);
225+ /* **************************************************************
226+ ** Create temp table to store the updates
227+ ****************************************************************/
228+ CREATE TABLE # Update (
229+ FirstName varchar (50 ) NOT NULL
230+ ,LastName varchar (50 ) NOT NULL
231+ );
226232
227233INSERT INTO # Update (FirstName, LastName)
228- VALUES
229- ( ' Kevin ' ' Martin ' )
230- , ( ' Jean-Luc ' , ' Picard ' );
234+ VALUES ( ' Kevin ' , ' Martin ' )
235+ ,( ' Jean-Luc ' ' Picard ' );
236+ 231237
238+ /* **************************************************************
239+ ** Perform Updates
240+ ****************************************************************/
232241UPDATE
233242 P WITH (UPDLOCK, SERIALIZABLE)
234243SET
235244 P .FirstName = U .FirstName
236245FROM
237- dbo .Person AS P
238- INNER JOIN # Update AS U
239- ON P .LastName = U .LastName ;
246+ dbo .Person AS P
247+ INNER JOIN # Update AS U ON P.LastName = U.LastName;
240248
249+ 250+ /* **************************************************************
251+ ** Perform Inserts
252+ ****************************************************************/
241253INSERT dbo .Person (FirstName, LastName)
242254SELECT
243255 U .FirstName
244256 ,U .LastName
245257FROM
246258 # Update AS U
247259WHERE
248- NOT EXISTS (SELECT * FROM dbo .Person AS P WHERE P .LastName = U .LastName );
260+ NOT EXISTS (
261+ SELECT * FROM dbo .Person AS P WHERE P .LastName = U .LastName
262+ );
263+ 264+ 265+ /* **************************************************************
266+ ** Perform Deletes
267+ ****************************************************************/
268+ DELETE
269+ P
270+ FROM
271+ dbo .Person AS P
272+ LEFT OUTER JOIN # Update AS U ON P.LastName = U.LastName
273+ WHERE
274+ U .LastName IS NULL ;
275+ 249276
250277COMMIT TRANSACTION;
251278```
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