For cursor oracle update

Hence I want to lock them to ensure no-one can alter them before I do my work. In this way, I want to make sure that no-one is modifying or deleting any CLERK records whilst I loop through the set of rows performing my action. It can also be useful when controlling access to records in a child table by locking the appropriate row in a parent table.

Rating 1 rating Is this answer out of date? You can also catch regular content via Connor's blog and Chris's blog. Does select statement lock the rows? What is row lock in Oracle? A row lock, also called a TX lock, is a lock on a single row of table. Oracle Database automatically places an exclusive lock on the updated row and a subexclusive lock on the table. Does update query lock table? Typically no, but it depends most often used answer for SQL Server! SQL Server will have to lock the data involved in a transaction in some way.

It has to lock the data in the table itself, and the data any affected indexes, while you perform a modification. What is row level locking in MySQL? If the tables use InnoDB, MySQL automatically uses row level locking so that multiple transactions can use same table simultaneously for read and write, without making each other wait.

How do I lock a table in mysql? If a table is locked with a read and a write lock, put the write lock before the read lock. Lock one table at a time until the thread gets all locks. Does select query lock table mysql? The default transaction isolation level means that selects don't lock stuff.

What is read lock in mysql? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Related Hot Network Questions.

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