Software Applications Programming Errors and solutions.

I am getting following SQL Error on running of Enterprise portal ,sharepoint site Could you advice solution on this error. Unknown SQL Exception 10054 occured. Additional error information from SQL Server is included below. A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.) Possible solution: An error has occurred while establishing a connection to the server. When connecting to SQL Serve and this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.)

There might be some reasons behind it: 1. Blocking situation 2. lack of userfull indexes 3. Lack of updated statistics 4. deadlock situation 5. network issue 6.Check the status of query.It can be either of two reasons.Either external or internal factor.External factors are resource crunches .Internal factors are because of missing index, invalid cache plan, fragmentation,so on.Starting point to identify higher level and then do a deep dive into particular area.

Log shipping, mirroring & replication are various types of HA (high availability) features. Each of them have their own set of pros and cons and various sets of features. Hence there is no compulsion and requirement to implement all of them. Rather the decision to choose them is driven by business requirement and at times the resources available for use. Db mirroring and log shipping are database level HA the replication is object level HA. If you have SSRS, then go for replication, never keep OLTP database to fetch SSRS reports. Replication is never a DR lets take an example that for your reporting environment you habe used transactional replication. On the reporting database server for best performance you build plenty of indexes which are not required on the OLTP environment therefore I believe clustering mirroring and log shipping are the best option always have a powerful backup strategy that will always help you.

Following the steps below to Move Reporting server database instance from one server to another in SQL Server 2005,2008,2012 etc 1. Take the backup report server and report server temp db and restore in another server. ( if you want to move db also) 2. In the new server open reporting service configuration manage and re configure with new server details and start again. 3. Remove the encryption keys . Then reports will work from new server.

Transaction log backup captures the transaction log which contains a record of all committed or uncommitted transactions. In full recovery model, some time log file getting full that and first we will check log bak taken r not the we ill take log backup then it will clear all committed transaction from log file this will happen if have doubt create on database do some bulk(select into or insert into) trans and check log file size and take t log back then compare sizes. Transaction log is a physical file in which SQL server stores the details of all transactions and data modifications performed on the database.In the event of of disaster, that causes SQL server to shutdown unexpectedly (Power failure/hardware failure), the transaction log is used to bring the database in a consistent state while restarting the server.On restarting the server, database goes through the recovery process.During this recovery process , the transaction log is used to make sure that all committed transaction

Dbcc loginfo dbcc log(your db ) or select * from fn_dblog(null,null)

Nolock is nothing but it decrease the concurrency of busy system. When there is nolock for data then that data can be taken by another transaction. Reads the dirty page irrespective to the isolation level. (Not in all scenario). NOLOCK is used in SELECT queries as query hint, it functions the same way as READ UNCOMITTED isolation level where dirty reads are possible. It is highly recommended for all applications where Performance and concurrency is vital and dirty reads takes a backseat. Like in non-banking and web based applications it is much used, and also in internal web applications used in back-office by multiple users. We can use NOLOCK in all non-financial and non-payment related transactions most of the times. Every domain and case needs to be verified.

Sql browser service is used to connect to a instance within the server. It runs at the OS LEVEL of architecture. Sql server browser service is used by sql server for named instance name resolution and for server name listing. i.e., for default instance default port will be 1433 and for named instance port will be dynamically allocated to provide the named instance port details browser service is used.

what is difference between configuration and installation of software? Answer: Software installation is a process in which we set up software ready for execution usually done by a installer. while configuration includes to set up a complete environment in which discussed software can execute. or simply we can say installation is a sub set of configuration.

The log file size grows and takes all free space sometimes.  Sometimes it works OK. Following advice may help you to handle the situation I may be mistaken, but I seem to remember a problem with a previous version of SQL doing this when some other process was interfering with the database files, like a system backup, antivirus scan, system updates or a fragment. When the process interferes with the SQL directory, the log files grew out of control until the hard drive filled up.  If you are running something like this, be sure to exclude your database directories from it. If you have a different server handling a function like this, exclude the db directories or server all together. You could put these database In full recovery and set transaction log backups or set up a job that runs DBCC Shrink file. and schedule it to run prior to mid-night. But you should read through the error log and event logs to determine the cause of the problem.

1. Which of the following queries can you use to search for employees with the pattern 'A_B' in their names? A. SELECT last_name FROM employees WHERE last_name LIKE '%A\_B%' ESCAPE '\\'; B. SELECT last_name FROM employees WHERE last_name LIKE '%A_B%' ESCAPE; C. SELECT last_name FROM employees WHERE last_name LIKE 'A_B%' ESCAPE '%'; D. SELECT last_name FROM employees WHERE last_name LIKE '%A\_B%' ESCAPE '\'; 2. The number of records in a table emp is given by statement A. Select total(*) from emp; B. Select count(*) from emp; C. Select sum(*) from emp; D. Select total from emp; 3. Write a query to Display the Name and studentid of all Students of branch CSE and ECE in alphabetical order by name. 4. Can you use the SQL JOIN and SQL HAVING clauses in one SQL statement? A .Yes. B . No. C . It depends. D . Don't know 5. # Which four are valid Oracle constraint types? A.

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