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MySQL Tutorial - Start a New Transaction Explicitly

By: FYIcenter.com

(Continued from previous topic...)

How To Start a New Transaction Explicitly?

If you are confused on the implicit new transaction rules, you can always start a new transaction with the "START TRANSACTION" command to start a new transaction explicitly. "START TRANSACTION" command works in both "Autocommit On" and "Autocommit Off" modes.

The following tutorial exercise shows you how to start a transaction explicitly:

>\mysql\bin\mysql -u dev -piyf fyi

mysql> START TRANSACTION;
Query OK, 0 rows affected (0.01 sec)

mysql> INSERT INTO fyi_links (url, id)
   VALUES ('fyicenter.com', 101);
Query OK, 1 row affected (0.11 sec)

mysql> INSERT INTO fyi_links (url, id)
   VALUES ('centerfyi.com', 110);
Query OK, 1 row affected (0.00 sec)

mysql> SELECT * FROM fyi_links;
+-----+---------------+-------+--------+--------------------
| id  | url           | notes | counts | created           
+-----+---------------+-------+--------+--------------------
| 101 | fyicenter.com | NULL  |   NULL | 2006-07-01 20:27:49
| 110 | centerfyi.com | NULL  |   NULL | 2006-07-01 20:28:10
+-----+---------------+-------+--------+--------------------
2 rows in set (0.07 sec)

mysql> ROLLBACK;
Query OK, 0 rows affected (0.07 sec)

(Continued on next topic...)

1. What Is a Transaction?
2. How To Start a New Transaction?
3. How To End the Current Transaction?
4. How To Create a Table for Transaction Testing?
5. How To Switch between Autocommit-On and Autocommit-Off Modes?
6. How To Find Out the Current Transaction Mode?
7. How To Start a New Transaction Explicitly?
8. How To Commit the Current Transaction?
9. How To Rollback the Current Transaction?
10. What Happens to the Current Transaction If a START TRANSACTION Is Executed?
11. What Happens to the Current Transaction If a DDL Statement Is Executed?
12. What Happens to the Current Transaction If the Session Is Ended?
13. What Happens to the Current Transaction If the Session Is Killed?
14. How Does MySQL Handle Read Consistency?
15. What Are Transaction Isolation Levels?
16. How To View and Change the Current Transaction Isolation Level?
17. What Is a Data Lock?
18. How To Experiment Data Locks?
19. How Long a Transaction Will Wait for a Data Lock?
20. What Happens to Your Transactions When ERROR 1205 Occurred?
21. What Is a Dead Lock?
22. How To Experiment Dead Locks?
23. What Happens to Your Transactions When ERROR 1213 Occurred?
24. What Are Impacts on Applications from Locks, Timeouts, and DeadLocks?