How the connection is closed after execution of queries?
Table of Contents
- 1 How the connection is closed after execution of queries?
- 2 How can I tell if a stored procedure is running?
- 3 What happens if we do not close connection in JDBC?
- 4 How do I find the last updated record in SQL Server?
- 5 How do I view a stored procedure in SQL?
- 6 What is the difference between deadlock and blocking in SQL Server?
- 7 What happens if a query is not executed within a transaction?
How the connection is closed after execution of queries?
To disconnect the connection after the query completes, from the menus go to Tools > Options > Query Execution > SQL Server > Advanced and select “Disconnect after the query executes”. After this point, any query executed will be disconnected and no further threads or connection will remain established.
How can I see last stored procedure in SQL Server?
You can use sys.proceedures to find the date of the most recent modification for stored procedures;
- SELECT [name], create_date, modify_date.
- FROM sys.procedures.
- ORDER BY 3 DESC;
How can I tell if a stored procedure is running?
You can see anything running in SQL Server using sys. dm_exec_requests dmv. It captures everything not only stored procedures. If you look at the details of the dmv you can see the details it captures.
How resolve self blocking in SQL Server?
Steps in troubleshooting:
- Identify the main blocking session (head blocker)
- Find the query and transaction that is causing the blocking (what is holding locks for a prolonged period)
- Analyze/understand why the prolonged blocking occurs.
- Resolve blocking issue by redesigning query and transaction.
What happens if we do not close connection in JDBC?
2 Answers. If we don’t close the connection, it will lead to connection memory leakage. Until application server/web server is shut down, connection will remain active, even if the user logs out.
Why should we close database connection after executing query?
2 Answers. For the purpose of safe coding, you should always close database connections explicitly to make sure that the code was able to close itself gracefully and to prevent any other objects from reusing the same connection after you are done with it.
How do I find the last updated record in SQL Server?
The simplest way to get the last updated record is by using the date or DateTime column in SQL Server. First, we should have a last modified column in SQL Server that will automatically have a DateTime value based upon the last modification.
How can I tell when a SQL database was last updated?
If a user wants to find out when was the last table updated he can query dynamic management view (DMV) – sys. dm_db_index_usage_stats and easily figure out when was the table updated last.
How do I view a stored procedure in SQL?
You can find the stored procedure in the Object Explorer, under Programmability > Stored Procedures as shown in the following picture: Sometimes, you need to click the Refresh button to manually update the database objects in the Object Explorer.
How do I view a blocked session?
Answer: You can query the dba_blockers and dba_waiters views to locate blocking sessions, but you can also get this information from v$lock and v$session. Also see these related notes on finding Oracle blocking sessions: Find blocking sessions with v$session. Find the data block for a blocking session.
What is the difference between deadlock and blocking in SQL Server?
Blocking is different than a deadlock. Deadlocking is a condition that occurs when two users or sessions have locks on separate objects and each process is trying to acquire a lock on the object that the other process has. The SQL server automatically detects and resolves deadlocks.
How to check if a procedure is running in SQL Server?
The SQL code above returns a list of names of your running processes. Note that you will need permission to view the Server/Database state. It returns all db activities. you will check from this proc if your procedure currently running or not.
What happens if a query is not executed within a transaction?
If the query is not executed within a transaction (and no lock hints are used), the locks for SELECT statements will only be held on a resource at the time it is actually being read, not during the query.
What causes a table to be blocked during query execution?
Blocking during query execution could be caused by query escalation, a scenario when row or page locks escalated to table locks. Microsoft SQL Server dynamically determines when to perform lock escalation.