Using Explicit Transactions : TRANSACTION « Transaction « SQL Server / T-SQL Tutorial






3>
4> CREATE TABLE employee(
5>    id          INTEGER NOT NULL PRIMARY KEY,
6>    first_name  VARCHAR(10),
7>    last_name   VARCHAR(10),
8>    salary      DECIMAL(10,2),
9>    start_Date  DATETIME,
10>    region      VARCHAR(10),
11>    city        VARCHAR(20),
12>    managerid   INTEGER
13> );
14> GO
1> INSERT INTO employee VALUES (1, 'Jason' ,  'Martin', 5890,'2005-03-22','North','Vancouver',3);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (2, 'Alison',  'Mathews',4789,'2003-07-21','South','Utown',4);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (3, 'James' ,  'Smith',  6678,'2001-12-01','North','Paris',5);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (4, 'Celia' ,  'Rice',   5567,'2006-03-03','South','London',6);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (5, 'Robert',  'Black',  4467,'2004-07-02','East','Newton',7);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (6, 'Linda' ,  'Green' , 6456,'2002-05-19','East','Calgary',8);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (7, 'David' ,  'Larry',  5345,'2008-03-18','West','New York',9);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (8, 'James' ,  'Cat',    4234,'2007-07-17','West','Regina',9);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (9, 'Joan'  ,  'Act',    6123,'2001-04-16','North','Toronto',10);
2> GO

(1 rows affected)
1>
2> select * from employee;
3> GO
id          first_name last_name  salary       start_Date              region     city                 managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
          1 Jason      Martin          5890.00 2005-03-22 00:00:00.000 North      Vancouver                      3
          2 Alison     Mathews         4789.00 2003-07-21 00:00:00.000 South      Utown                          4
          3 James      Smith           6678.00 2001-12-01 00:00:00.000 North      Paris                          5
          4 Celia      Rice            5567.00 2006-03-03 00:00:00.000 South      London                         6
          5 Robert     Black           4467.00 2004-07-02 00:00:00.000 East       Newton                         7
          6 Linda      Green           6456.00 2002-05-19 00:00:00.000 East       Calgary                        8
          7 David      Larry           5345.00 2008-03-18 00:00:00.000 West       New York                       9
          8 James      Cat             4234.00 2007-07-17 00:00:00.000 West       Regina                         9
          9 Joan       Act             6123.00 2001-04-16 00:00:00.000 North      Toronto                       10

(9 rows affected)
1>
2>
3> SELECT COUNT(*) BeforeCount FROM employee
4> -- Variable to hold the latest error integer value
5>
6> DECLARE @Error int
7>
8> BEGIN TRANSACTION
9>
10> INSERT employee(ID, first_Name)VALUES (10, 'A')
11> SET @Error = @@ERROR
12> IF (@Error<> 0) GOTO Error_Handler
13> INSERT employee(ID, first_Name)VALUES (11, 'E')
14> SET @Error = @@ERROR
15> IF (@Error <> 0) GOTO Error_Handler
16> COMMIT TRAN
17> Error_Handler:
18> IF @Error <> 0
19> BEGIN
20> ROLLBACK TRANSACTION
21> END
22> GO
BeforeCount
-----------
          9

(1 rows affected)

(1 rows affected)
1>
2> SELECT COUNT(*) AfterCount FROM employee
3> GO
AfterCount
-----------
         11

(1 rows affected)
1>
2>
3>
4> drop table employee;
5> GO
1>








23.1.TRANSACTION
23.1.1.A transaction is bound by the ACID test. ACID stands for Atomicity, Consistency, Isolation (or Independence), and Durability:
23.1.2.Explicit Transaction Commands
23.1.3.Using Transactions
23.1.4.BEGIN TRANSACTION
23.1.5.Using Explicit Transactions
23.1.6.Forcing an exclusive table lock.
23.1.7.Transaction spread across batches:
23.1.8.Exception before transaction committing
23.1.9.statements coded as a transaction
23.1.10.A script with nested transactions
23.1.11.One batch that contains two transactions
23.1.12.What happens with stored proc transactions and exceptions?
23.1.13.Declare variable in a transaction
23.1.14.Inserting a Row into MyTable and Rolling Back the Transaction