Rollback Transaction Mysql

PHP pdo transaction rollback code example $ this-> beginTransaction (); $ this-> exec ('update people set age = 2'); // $ step1 = mysql tutorial _error (); / / your class, Change to the implementation of sql error, get the error code, the corresponding function $ this-> exec ('INSERT INTO course (course, num) ...

Mysql often encountered during the three failures, in this summary. 1, MySQl service can not start We use mysql process, often encounter MySQl service can not start, specific error message: Starting MySQL ERROR.The server quit without updating PID file (/ [FAILED] l / mysql /) For such error,...

MongoDB is currently the best document-oriented free Open-source NoSQL database. If you are preparing to participate in a technical interview for the MongoDB NoSQL database, you might want to look at the following MongoDB NoSQL interview questions and answers. These MongoDB NoSQL interview questions cover the basic concepts of NoSQL databases, replication (Replication), fragmentation (Sharding), Transactions and locks, trace analysis Tools (Profiler), nuances, and logging features. Let's look at the following ...

In the past few years, relational databases have been the only choice for data persistence, and data workers are considering only filtering in these traditional databases, such as SQL Server, Oracle, or MySQL. Even make some default choices, such as using. NET will typically choose SQL Server, and Java may be biased toward Oracle,ruby, Mysql,python is PostgreSQL or MySQL, and so on. The reason is simple: In the past a long time, the relational database is robust ...

After more than eight years of practice, from Taobao's collection business to today to support all of Alipay's core business, and in the annual "Double Eleven Singles Day" continue to create a world record for the transaction database peak processing capacity.

The intermediary transaction SEO diagnosis Taobao guest Cloud host Technology Hall opened its own domain name blog, the first one to get a heavy bit of the 4 U.S. dollars to the domain name. As a technical practitioner for ten years, stroll around for ten years to find some knowledge East a hammer West a club to look around the whole time to tidy up a clue, that I on the system point of the beginning of the step-by-step, a small web site from the day thousands of visit to the day to visit 1 million or 2 million of small sites, how to let it smoothly through this stage, not in The technology appears congenitally deficient, writes to some technical personnel, also writes does not understand ...

NoSQL systems generally advertise a feature that is good performance and then why? relational database has developed for so many years, various optimization work has been done very deep, nosql system is generally absorbing relational database technology, and then, in the end what is the constraints on the performance of relational database? We look at this problem from the perspective of http://www.aliyun.com/zixun/aggregation/9344.html "> System design." 1, index support. Relational data ...