With this short article, I will tell you about How to Fix Distribution setup SQL Server Agent error: "RegCreateKeyEx() returned error 5, 'Access is denied.'" on my SQL Server 2012 Hosting.

In the Configure Distribution Wizard, the step "Configuring SQL Server Agent to start automatically" errors with the following text:

TITLE: Configure Distribution Wizard
------------------------------
An error occurred configuring SQL Server Agent.
------------------------------
ADDITIONAL INFORMATION:
RegCreateKeyEx() returned error 5, 'Access is denied.' (Microsoft SQL Server, Error: 22002)

This is a very minor error, and not difficult to work around at all. The wizard is making an attempt to alter the SQL Server Agent service "Start Mode" to Automatic. you'll be able to try this via the SQL Server Configuration Manager instead.

In the Sysinternals method Monitor, you'll see: Operation: RegCreateKey Result: ACCESS DENIED Path: "HKLM\System\CurrentControlSet\Services\SQLAgent$SQL2012"

If you encounter this error, choose "No" in the "SQL Server Agent Start" page in the configure Distribution Wizard (as shown below), so set your agent service to Automatic start Mode via the SQL Server Configuration Manager.

The third step of the wizard that failed before won't happen. Why the failure truly happens I didn't figure this out, and i am open to feedback, however this seems like a vestigial step to a wizard that otherwise has no negative impact. Running SSMS with "run as Administrator" doesn't seem to fix this error either. i would like to recognize why this error happens within the 1st place.

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Instead of triggers are used to skip DML commands. They fire when you try to execute insert, update or delete statement but instead of executing these commands trigger actually works and trigger functionality executes.
 

Example
    create table approved_emp ( eid int identity(1,1), ename varchar(30)) 
    create table emp ( id int identity(1,1) , ename varchar(30), AddedBy varchar(30)) 
      
    Create trigger instead_of on approved_emp 
    instead of insert 
    as 
    begin 
    declare @name varchar(30) 
    select @name=ename from inserted 
    insert into temp_audit values(@name, USER ) 
    end 

So, basically, trigger will work as, when we will try to add new record in approved_emp table, instead of inserting new records it will add ename into emp table. No data will reflect in approved_emp table as trigger is fired on the table every time while adding data into that table.
 
You can also create instead of triggers for update and delete as well.
 

In this post, I'll share few useful SQL queries for database analysis on SQL Server 2012. I shared few SQL queries useful in analyzing database, which I use quite often. This query will return all table names and no.of rows in it for built-in tables.

    -- List all table names and number of rows in it for user-defined tables 
    SELECT distinct t.name,prt.rows 
    FROM sys.tables t INNER JOIN sys.partitions AS prt 
    ON t.object_id = prt.object_id where t.is_ms_shipped=1 -- 0 for user-defined tables 
    order by prt.rows desc 

This query will return column names and its data type of a table.
    -- Get column names and its types of a table 
    SELECT cols.name,t.name 
    FROM sys.objects o join sys.columns cols on o.object_id= cols.object_id 
    join sys.types t on t.system_type_id=cols.system_type_id 
    and o.name='Employee'-- Table Name

This query will return file name, its size and file group name of a database.
    SELECT sdf.name AS [FileName], 
    size/128 AS [Size], 
    fg.name AS [File_Group_Name] 
    FROM sys.database_files sdf 
    INNER JOIN 
    sys.filegroups fg 
    ON sdf.data_space_id=fg.data_space_id 

Batch file to execute all sql files in a directory, Save it as .bat in a folder that have sql script files to be executed.
    @Echo Off 
    FOR /f %%i IN ('DIR *.Sql /B') do call :RunSql %%i 
    GOTO :END 
    :RunSql 
    Echo Executing SQL: %1 
    SQLCMD -S server1 -U user1 -P pwd1 -d DB1 -i %1 
    Echo Completed SQL: %1 
    :END 

This query will return all table names that have a Foreign key:
    SELECT SCHEMA_NAME(schema_id) AS SchemaName, 
    name AS TableName 
    FROM sys.tables where OBJECTPROPERTY(OBJECT_ID,'TableHasForeignKey') = 1 -- Return all

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Database Administrators usually use the sp_renamedb system stored procedure to quickly rename a SQL Server Database. However, the drawback of using sp_renamedb is that it doesn't rename the Logical and Physical names of the underlying database files. It's a best practice to make sure the Logical Name and Physical File Name of the database is also renamed to reflect the actual name of the database to avoid any confusion with backup, restore or detach/attach operations.

Let's first create a new database named CoreDB using the T-SQL below:

USE master
GO
IF EXISTS (SELECT name FROM sys.databases WHERE name = N'CoreDB')
DROP DATABASE CoreDB
GO
USE master
GO
CREATE DATABASE [CoreDB]
ON PRIMARY
(
NAME = N'CoreDB',
FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10.SQL2008\MSSQL\DATA\CoreDB.mdf' ,
SIZE = 2048KB ,
FILEGROWTH = 1024KB
)
LOG ON
(
NAME = N'CoreDB_log',
FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10.SQL2008\MSSQL\DATA\CoreDB_log.ldf' ,
SIZE = 1024KB ,
FILEGROWTH = 10%
)
GO
Rename CoreDB Database Using sp_renamedb System Stored Procedure

Now let's rename the CoreDB database to ProductsDB by executing the below T-SQL code.

USE master
GO
ALTER DATABASE CoreDB
SET SINGLE_USER
WITH ROLLBACK IMMEDIATE
GO
EXEC master..sp_renamedb 'CoreDB','ProductsDB'
GO
ALTER DATABASE ProductsDB
SET MULTI_USER
GO
Once the above T-SQL has executed successfully the database name will change however the Logical Name and File Name will not change. You can verify this by executing the T-SQL below:

USE master
GO
/* Identify Database File Names */
SELECT
name AS [Logical Name],
physical_name AS [DB File Path],
type_desc AS [File Type],
state_desc AS [State]
FROM sys.master_files
WHERE database_id = DB_ID(N'ProductsDB')
GO
Your output should look something like this from the above query.

You can see in the above snippet that the Logical Name and File Name in the DB File Path column for ProductsDB are still reflecting the old name of CoreDB. This is not a good practice to follow in a Production Environment. Below you will see the steps which a DBA can follow to rename the database and its respective files.

Steps to Rename a SQL Server Database

DBAs should follow the below steps which will not only rename the database, but at the same time will also rename the Logical Name and File Name of the database.

This first set of commands put the database in single user mode and also modifies the logical names.


/* Set Database as a Single User */
ALTER DATABASE CoreDB SET SINGLE_USER WITH ROLLBACK IMMEDIATE
/* Change Logical File Name */
ALTER DATABASE [CoreDB] MODIFY FILE (NAME=N'CoreDB', NEWNAME=N'ProductsDB')
GO
ALTER DATABASE [CoreDB] MODIFY FILE (NAME=N'CoreDB_log', NEWNAME=N'ProductsDB_log')
GO
This is the output from the above code.

Now we need to detach the database, so we can rename the physical files.  If the database files are open you will not be able to rename the files.

/* Detach Current Database */
USE [master]
GO
EXEC master.dbo.sp_detach_db @dbname = N'CoreDB'
GO
Once the CoreDB database is detached successfully then the next step will be to rename the Physical Files. This can be done either manually or by using the xp_cmdshell system stored procedure. You can enable xp_cmdshell feature using the sp_configure system stored procedure.

USE master
GO
sp_configure 'show advanced options'
GO
/* 0 = Disabled , 1 = Enabled */
sp_configure 'xp_cmdshell', 1
GO
RECONFIGURE WITH OVERRIDE
GO
Once xp_cmdshell is enabled you can use the below script to rename the physical files of the database.

/* Rename Physical Files */
USE [master]
GO
EXEC xp_cmdshell 'RENAME "C:\Program Files\Microsoft SQL ServerMSSQL10.SQL2008\
MSSQL\DATA\CoreDB.mdf", "ProductsDB.mdf"'
GO
EXEC xp_cmdshell 'RENAME "C:\Program Files\Microsoft SQL ServerMSSQL10.SQL2008\
MSSQL\DATA\CoreDB_log.ldf", "ProductsDB_log.ldf"'
GO
Once the above step has successfully executed then the next step will be to attach the database, this can be done by executing the T-SQL below:

/* Attach Renamed ProductsDB Database Online */
USE [master]
GO
CREATE DATABASE ProductsDB ON
( FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10.SQL2008\MSSQL\DATA\ProductsDB.mdf' ),
( FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10.SQL2008\MSSQL\DATA\ProductsDB_log.ldf' )
FOR ATTACH
GO
Once the above step has successfully executed then the final step will be to allow multi user access for the user database by executing the below T-SQL:

/* Set Database to Multi User*/
ALTER DATABASE ProductsDB SET MULTI_USER
GO
You can verify the Logical and File Names for the ProductsDB database by executing the T-SQL below:

USE master
GO
/* Identify Database File Names */
SELECT
name AS [Logical Name],
physical_name AS [DB File Path],
type_desc AS [File Type],
state_desc AS [State]
FROM sys.master_files
WHERE database_id = DB_ID(N'ProductsDB')

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In this post I will show you how to Clearing Down A Database Full Of Constraints In SQL Server. Have you ever been in a scenario where you have to clear down some data within a database that is chock full of constraints but don't want to wipe out your precious relationships, indices and all that other jazz?

I found myself in a similar situation earlier this week, and needed a clear-down script that would wipe out all of the data within an entire database, without being bothered by any existing constraints. Here it is.

    USE @YourTable;  
    EXEC sp_MSForEachTable "ALTER TABLE ? NOCHECK CONSTRAINT ALL"  
    EXEC sp_MSForEachTable "DELETE FROM ?"  
    EXEC sp_MSForEachTable "ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL"  
    GO  

What is this doing?
The script itself takes advantage of an undocumented stored procedure within SQL Server called sp_MSForEachTable that will actually iterate through all of the tables within a given database.

Now that we know we are going to be looping through each of the tables within the specified database, let's see what is going to happen to each of the tables.

    ALTER TABLE ? NOCHECK CONSTRAINT ALL
    This will disable any constraint checking that is present on the table (so, operations like deleting a primary key or a related object won't trigger any errors).

    DELETE FROM ?
    This will delete every record within the table.

    ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL
    This re-enables the constraint checking, bringing your table back to its original state, sans data.

Note
It is very important that you properly scope this query to the table that you are targeting to avoid any crazy data loss.

While I don't think that you could just leave that out and execute on master, I wouldn't want to even risk testing that out (although feel free to try it out and let me know if it nukes everything).

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In this post, let me show you how to fix SQL Server Can't Connect to Local Host. Many times we find issues when connecting to the SQL Server. It gives us the message “SQL Server is not able to connect to  local host” as you can see on the following picture:

To fix this issue:
Go to Start->Run->Services.msc.

Once the Services are open, select SQL Server and start it, as per the given screenshot, given below:

After you do it, SQL server will be up and running again.

SQL Server sometimes stops because of some problem. These steps help to make it up. Thanks for reading.

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In This code snippet, i will tell you about how Uploading Excelsheet Data in SQL Server Table. Now, write the followind code:

protected void btnSend_Click(object sender, EventArgs e) { 
    try { 
        string path = string.Concat(Server.MapPath("~/File/" + fileuploadExcel.FileName)); 
        fileuploadExcel.SaveAs(path); 
        string connExcelString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1\";", path); 
        OleDbConnection excelConnection = new OleDbConnection(connExcelString); 
        OleDbCommand cmd = new OleDbCommand("Select [Name],[Mobile],[Email],[City],[DataId],[Date],[Source] from [Sheet1$]", excelConnection); 
        excelConnection.Open(); 
        OleDbDataReader dReader; 
        dReader = cmd.ExecuteReader(); 
        SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnection); 
        SqlBulkCopyColumnMapping mapName = new SqlBulkCopyColumnMapping("Name", "Name"); 
        sqlBulk.ColumnMappings.Add(mapName); 
        SqlBulkCopyColumnMapping mapMobile = new SqlBulkCopyColumnMapping("Mobile", "Mobile"); 
        sqlBulk.ColumnMappings.Add(mapMobile); 
        SqlBulkCopyColumnMapping mapEmail = new SqlBulkCopyColumnMapping("Email", "Email"); 
        sqlBulk.ColumnMappings.Add(mapEmail); 
        SqlBulkCopyColumnMapping mapCity = new SqlBulkCopyColumnMapping("City", "City"); 
        sqlBulk.ColumnMappings.Add(mapCity); 
        //SqlBulkCopyColumnMapping mapState = new SqlBulkCopyColumnMapping("State", "State"); 
        //sqlBulk.ColumnMappings.Add(mapState); 
        SqlBulkCopyColumnMapping mapDataId = new SqlBulkCopyColumnMapping("DataId", "DataId"); 
        sqlBulk.ColumnMappings.Add(mapDataId); 
        SqlBulkCopyColumnMapping mapAmount = new SqlBulkCopyColumnMapping("Date", "Date"); 
        sqlBulk.ColumnMappings.Add(mapAmount); 
        SqlBulkCopyColumnMapping mapSource = new SqlBulkCopyColumnMapping("Source", "Source"); 
        sqlBulk.ColumnMappings.Add(mapSource); 
        //Give your Destination table name 
        sqlBulk.DestinationTableName = "UploadedExcelData"; 
        sqlBulk.WriteToServer(dReader); 
        excelConnection.Close(); 
        UpdateRecords(); 
        lblMsg.Text = "File Data Uploaded Successfully... "; 
        File.Delete(path); 
    } catch (Exception ex) { 
        lblMsg.Text = "Something Went Wrong... Plz Check Excel File "; 
        //string script = "<script>alert('" + ex.Message + "');</script>"; 
    } 
}

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In this post, I'll share few useful SQL queries for database analysis on SQL Server 2012. I shared few SQL queries useful in analyzing database, which I use quite often. This query will return all table names and no.of rows in it for built-in tables.

    -- List all table names and number of rows in it for user-defined tables 
    SELECT distinct t.name,prt.rows 
    FROM sys.tables t INNER JOIN sys.partitions AS prt 
    ON t.object_id = prt.object_id where t.is_ms_shipped=1 -- 0 for user-defined tables 
    order by prt.rows desc 

This query will return column names and its data type of a table.
    -- Get column names and its types of a table 
    SELECT cols.name,t.name 
    FROM sys.objects o join sys.columns cols on o.object_id= cols.object_id 
    join sys.types t on t.system_type_id=cols.system_type_id 
    and o.name='Employee'-- Table Name

This query will return file name, its size and file group name of a database.
    SELECT sdf.name AS [FileName], 
    size/128 AS [Size], 
    fg.name AS [File_Group_Name] 
    FROM sys.database_files sdf 
    INNER JOIN 
    sys.filegroups fg 
    ON sdf.data_space_id=fg.data_space_id 

Batch file to execute all sql files in a directory, Save it as .bat in a folder that have sql script files to be executed.
    @Echo Off 
    FOR /f %%i IN ('DIR *.Sql /B') do call :RunSql %%i 
    GOTO :END 
    :RunSql 
    Echo Executing SQL: %1 
    SQLCMD -S server1 -U user1 -P pwd1 -d DB1 -i %1 
    Echo Completed SQL: %1 
    :END 

This query will return all table names that have a Foreign key:
    SELECT SCHEMA_NAME(schema_id) AS SchemaName, 
    name AS TableName 
    FROM sys.tables where OBJECTPROPERTY(OBJECT_ID,'TableHasForeignKey') = 1 -- Return all

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In this tutorial, I will explain about inline queries. Most of the developers are very familiar with inline queries. Inline queries are basically known as sub queries or Inner Select statements which are always used inside a SELECT, INSERT, UPDATE, or DELETE statement, or inside another inline query.  They can be used anywhere in SQL scripts to encounter the conditional expressions. The SQL statement containing an Inline query is also known an outer query or outer select.

How can Inline Queries helpful?

Most of the T-SQL statements which include inline queries can be alternatively formulated as join to encounter the conditional expressions. Other questions can be posed only with inline queries. In T-SQL, there is usually no performance difference between a statement that includes an inline query and a semantically equivalent version that does not. However, in some cases where existence must be checked, a join yields better performance.

Components of an Inline Query

An inline query has the same features as a normal SQL query. They only persist in the SQL statements and could have the following components –

• A regular SELECT query including regular select list components from the main table.
• A regular FROM clause including one or more table, function or view names.
• An optional WHERE clause to encounter the conditional expressions.
• An optional GROUP BY clause if your query contains aggregation functions.
• An optional HAVING clause if your query contains aggregation functions.

Points to be remember

The SELECT query of an Inline query is always enclosed in parentheses. It cannot include a COMPUTE or FOR BROWSE clause, and may only include an ORDER BY clause when a TOP clause is also specified. There are three basic types of inline queries-
Operate on lists introduced with IN, or those that a comparison operator modified by ANY or ALL.
Are introduced with an unmodified comparison operator and must return a single value.
Are existence tests introduced with EXISTS.

To understand their functionality, we will create a table variable to work as the base table for the inline statements as given below-

---- declare OrderMaster table variable body
DECLARE @OrderMaster TABLE
(
OrdId INT IDENTITY(100,1),
OrdDate VARCHAR(30),
CustName VARCHAR(20)
)
---- declare OrderDetails table variable body
DECLARE @OrderDetails TABLE
(
OrdId INT,
ItemId VARCHAR(30),
ItemName VARCHAR(20),
SellingPrice Decimal(12,4)
)
---- Insert Values
INSERT INTO @OrderMaster (OrdDate,CustName)
Values (Getdate(),'Ryan Arjun'),(Getdate(),'Bill Trade'),
(Getdate(),'Rosy White')

---- Pull Order Data
SELECT * FROM @OrderMaster

----Fill Order Details
Insert Into @OrderDetails (OrdId, ItemId, ItemName, SellingPrice)
Values (100, 201,'Apple',135.78),(100, 202,'Mango',235.78)
,(101, 203,'Banana',124.50),(101, 204,'Orange',321.15)
,(102, 205,'Banana',124.50),(102, 204,'Orange',321.15),(102, 201,'Apple',135.78)

--- Pull Order Details
select * from @OrderDetails

Now, we have the tables and want to pull the order and customer wise total sales.

Pull Single Value

There are many ways to do this but we are using inline query to accomplish this task. To pull the single value, we are using inline query within the main SQL statement as given below-

---- Use inline query in the select statement
select OrdId, CustName,
---- Inline query for single value
[Price] =(Select 
[Price]=sum(SellingPrice)
from @OrderDetails
where OrdId=  Om.OrdId
)
from @OrderMaster OM

Pull Multiple Values with Group By
If we want to pull more than one column then inline query should work as join with the main query as given below:

---- Inline Query as Join
SELECT Om.OrdId, Om.CustName,
OD.[Item-Qty], OD.Price
FROM @OrderMaster OM
JOIN
(
SELECT  OrdId,
[Item-Qty]=COUNT(ItemId),
[Price]=SUM(SellingPrice)
FROM @OrderDetails
GROUP BY ORDID
)OD
ON OM.ORDID=OD.ORDID

Pull Value with Where Clause and Group By
If we want to pull more than one column based on some conditional expression then inline query should work as join with the main query as given below:

---- Inline Query as Join
SELECT Om.OrdId, Om.CustName,
OD.[Item-Qty], OD.Price
FROM @OrderMaster OM
JOIN
(SELECT  OrdId,
[Item-Qty]=COUNT(ItemId),
[Price]=SUM(SellingPrice)
FROM @OrderDetails
---- Conditional Expression
WHERE ItemName='Apple'
GROUP BY ORDID
)OD
ON OM.ORDID=OD.ORDID

Conclusion

It’s very beneficial concept in SQL and we can use them inside a SELECT, INSERT, UPDATE, or DELETE statement, or inside another inline query.  They are easily applicable in the function and stored procedure. These features are important in some Transact-SQL statements; the inline-query can be evaluated as if it were an independent query. Conceptually, the inline-query results are substituted into the outer query.

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From SQL Server 2012 version, when SQL Server instance is restarted, then table's Identity value is jumped and the actual jumped value depends on identity column data type. If it's integer (int) data type, then jump value is a thousand and if huge integer (bigint), then jump value is ten thousand. From our application point of view, this increment isn't acceptable for all the business cases especially once the value shows to the client. this is the special case/issue ships with only SQL Server 2012 and older versions don't have any such issue.

A few days ago, our QA Engineer claims that one of our table's identity column jumped ten thousand. Which means the last identity value of that table was 2200 now it's 12001. In our business logic is like that the value shows to the client and it will not be accepted by the client. So we must solve the issue.
Using the Code

The first time, we all are surprised and confused on how it's possible? we usually don't insert any value in identity column (insert value to identity column is possible). The identity value is maintained by SQL Server itself. one of our core team members started investigation the issue and found out the solution. Now, i want to elaborate the issue and solution that was found out by my colleague.

Now, you need to setup SQL Server 2012 and create a test database. Then create a table with auto identity column with the following code:
create table MyTestTable(Id int Identity(1,1), Name varchar(255));

Now insert 2 rows there:
insert into MyTestTable(Name) values ('Mr.Tom');
insert into MyTestTable(Name) values ('Mr.Jackson');

You see the result:
SELECT Id, Name FROM MyTestTable;

The result is as expected. Now just restart your SQL Server service. There are various ways in which you can do it. We did it from SQL Server management studio.

Now, insert another 2 rows to the same table again:
insert into MyTestTable(Name) values ('Mr.Tom2');
insert into MyTestTable(Name) values ('Mr.Jackson2');

Now, you can see the result:
SELECT Id, Name FROM MyTestTable;

Now you see that after restarting the SQL Server 2012 instance, then identity value starts with 1002. It means it jumped 1000. Previously, I said that we also see if the data type of that identity column is bigint, then it will jump 10000.

Microsoft declares it is a feature rather than a bug and in many scenarios it would be helpful. But in our case, it would not be acceptable because that number is shown to the client and the client will be surprised to see that new number after jump and the new number depends on how many times SQL Server is restarted. If it is not visible to the client, then it might be acceptable so that the number is used internally.
Solutions

If we are not interested in this so called feature, then we can do two things to stop that jump.
    Using Sequence
  Register -t272 to SQL Server Startup Parameter

Using Sequence
First, we need to remove Identity column from tables. Then create a sequence without cache feature and insert number from that sequence. The following is the code sample:
CREATE SEQUENCE Id_Sequence
    AS INT
    START WITH 1
    INCREMENT BY 1
    MINVALUE 0
    NO MAXVALUE
   NO CACHE

   insert into MyTestTable values(NEXT VALUE FOR Id_Sequence, 'Mr.Tom');

   insert into MyTestTable values(NEXT VALUE FOR Id_Sequence, 'Mr.Jackson');

How to Register -t272 to SQL Server Startup Parameter?
First, open the SQLServer configuration manager from your server. Select SQL Server 2012 instance there right client and select Properties menu. You will find a tabbed dialog window. You select start up parameters tab from there and register -t272. Then restart SQL Server 2012 instance again and see the difference as you can see on the following picture:

If too many tables contain identity column to your database and all contain existing values, then it is better to go for solution 2. Because it is a very simple solution and its scope is server wise. This means if you add SQL Server 2012 parameter -t272 there, then it will affect all your databases there. If you want to create a new database and you need auto generated number field, then you can use solution 1, that means use sequence value to a column instead of auto Identity value. There are so many articles you can find online about when you will use auto identity column when using sequence and advantages/disadvantages of each other. I hope you will read all those and take the appropriate decision.

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