How To Start a New Transaction

Q

How To Start a New Transaction? - Oracle DBA FAQ - Understanding SQL Transaction Management

✍: FYIcenter.com

A

There is no SQL statement to explicitly start a new transaction. Oracle server implicitly starts a new transaction with the following two conditions:

The first executable statement of a new user session will automatically start a new transaction.
The first executable statement after a previous transaction has been ended will automatically start a new transaction.

2007-04-18, 5037👍, 0💬

How To Count Groups Returned with the GROUP BY Clause
How To Count Groups Returned with the GROUP BY Clause? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you use the COUNT(*) function on groups returned with the GROUP BY clause, it will count the number of rows within each group, not the number of groups. If you want to count the num... 2007-04-19, 5523👍, 0💬

How To Create a Testing Table
How To Create a Testing Table? - Oracle DBA FAQ - Understanding SQL Transaction Management If you want to practice DML statements, you should create a testing table as shown in the script below: >cd (OracleXE home directory) >.\bin\sqlplus /nolog SQL> connect HR/fyicenter Connected. SQL> CREATE TABL... 2007-04-18, 5517👍, 0💬

How To Use Subqueries with the EXISTS Operator
How To Use Subqueries with the EXISTS Operator? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements A subquery can be used with the EXISTS operator as "EXISTS (subquery)", which returns true if the subquery returns one or more rows. The following statement is a good example of "EXISTS (subq... 2007-04-19, 5129👍, 0💬

How To Rollback the Current Transaction
How To Rollback the Current Transaction? - Oracle DBA FAQ - Understanding SQL Transaction Management If you have used some DML statements updated some data objects, you find a problem with those updates, and you don't want those updates to be permanently recorded in the database, you can use the ROL... 2007-04-18, 5096👍, 0💬

How To Start a New Transaction
How To Start a New Transaction? - Oracle DBA FAQ - Understanding SQL Transaction Management There is no SQL statement to explicitly start a new transaction. Oracle server implicitly starts a new transaction with the following two conditions: The first executable statement of a new user session will ... 2007-04-18, 5038👍, 0💬

What Happens to the Current Transaction If a DDL Statement Is Executed
What Happens to the Current Transaction If a DDL Statement Is Executed? - Oracle DBA FAQ - Understanding SQL Transaction Management If a DDL statement is executed, the current transaction will be committed and ended. All the database changes made in the current transaction will become permanent. Thi... 2007-04-18, 5017👍, 0💬

What Is a Transaction
What Is a Transaction? - Oracle DBA FAQ - Understanding SQL Transaction Management A transaction is a logical unit of work requested by a user to be applied to the database objects. Oracle server introduces the transaction concept to allow users to group one or more SQL statements into a single tran... 2007-04-18, 5009👍, 0💬

How To Commit the Current Transaction
How To Commit the Current Transaction? - Oracle DBA FAQ - Understanding SQL Transaction Management If you have used some DML statements updated some data objects, and you want to have the updates to be permanently recorded in the database, you can use the COMMIT statement. It will make all the datab... 2007-04-18, 5006👍, 0💬

How To Use Subqueries in the FROM clause
How To Use Subqueries in the FROM clause? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you have a query returning many rows of data, and you want to perform another query on those rows, you can put the first query as a subquery in the FROM clause of the second query. The following... 2007-04-19, 4935👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.