oracle commit work

[Oracle]-[impact of COMMIT on indexes]-from trace, we can see the impact of COMMIT on indexes. Recently, due to work requirements, there is a task involving data migration, therefore, I have been paying attention to the time-consuming issue of

Start transaction,COMMIT, AndROLLBACKSyntax From: http://dev.mysql.com/doc/refman/5.0/en/commit.html Of course, the article noted from MySQL, but MySQL, SQL Server, Oracle start tracmsaction, commit, and rollback syntax are no problem in DML. I hope

Today, oracle SQL plus performed the delete and query operations and then the query operations in PL/SQL. The results of the same statements were different, which made me feel quite depressed, later, I suddenly thought that the data on both sides

Distributed transactions are transactions that occur between multiple databases, and in Oracle, transactions are handled in a dblink manner, and distributed transactions are much more complex than stand-alone transactions. Most relational databases

Today, in Oracle's SQL plus run the delete and query operations, and then run the query in PL/SQL, the same, the result is not the same, let me feel depressed, and then suddenly thought may be on both sides of the data inconsistency caused, but why

Today, in Oracle's SQL plus execution of the delete and query operations, and then execute the query in PL/SQL, the same results are not the same, let me feel depressed, and then suddenly think of the two sides of the data inconsistency caused, but

DML languages, such as Update,delete,insert, are required to modify the data in the table Commit;ddl language, such as Create,drop, to change the table structure, do not need to write a commit (because the internal hidden commit);DD l Data

SCN is the clock that Oracle hangs on the wall. Get up in the morning, say "Get up SCN"; eat breakfast, name "Breakfast SCN"; go to work, called "Go out SCN ". Any of our activities will correspond to an SCN. We can use an internal Oracle package to

Oracle's architecture is broadly divided into two parts: Instance (instance) and database. Instance (example) : The SGA is mainly included in Oracle Instance and some processes (for example: Pmon, Smon, Dbwn, LGWR, CKPT, etc.). If a user's

Today, Oracle SQL plus performed the delete and query operations and then the query operations in PL/SQL. The results of the same statements were different, which made me feel quite depressed, later, I suddenly thought it may be caused by