SQLYoga

December 24, 2012

SQL SERVER: Cross tab Query with Pivot (Dynamic Pivot)

As I mentioned earlier, PIVOT, in my earlier post, where we have reviewed the PIVOT with static columns. In practical world, we may need to have dynamic columns that needs to be displayed as below:

As Mentioned in Image, Here, dates are dynamic, based on Order Date, 10/25,10/26,10/27,10/28 etc..To achieve the same with Dynamic columns please find query for the same:

CREATE TABLE #TestTable(ctrl_no INT, id int, Amount NUMERIC(18,2), OrderDate DATE)

INSERT INTO #TestTable(ctrl_no , id , Amount , OrderDate )
SELECT 1000029,100016,990.0000,'10/25/2012'
UNION ALL
SELECT 1000029,100018,990.0000,'10/25/2012'
UNION ALL
SELECT 1000029,100016,660.0000,'10/26/2012'
UNION ALL
SELECT 1000029,100018,660.0000,'10/26/2012'
UNION ALL
SELECT 1000029,206007,660.0000,'10/26/2012'
UNION ALL
SELECT 1000029,206007,660.0000,'10/27/2012'

DECLARE @MinDate DATE
	,@MaxDate DATE
DECLARE @Dates VARCHAR(MAX)

SELECT @Dates = ''

SELECT @MinDate = MIN(OrderDate)
	,@MaxDate = MAX(OrderDate)
FROM #TestTable

WHILE @MinDate <= @MaxDate
BEGIN
	SELECT @Dates = @Dates + '[' + CONVERT(VARCHAR(10), @MinDate, 101) + '],'

	SELECT @MinDate = DATEADD(d, 1, @MinDate)
END

SELECT @Dates = LEFT(@Dates, LEN(@Dates) - 1)

DECLARE @qry NVARCHAR(MAX)

SELECT @qry = N'

SELECT    id,
        ' + @Dates + '
FROM (
    SELECT    id,
            ISNULL(Amount,0) AS Amount,
            OrderDate
    FROM #TestTable t
) x
PIVOT(
    SUM(Amount) FOR OrderDate IN(' + @Dates + ')
) p '

EXEC (@qry)

DROP TABLE #TestTable

Let me know if you have any question/comment.

Reference : Tejas Shah http://www.SQLYoga.com

November 20, 2012

Configure SQL Reporting Service, to Access Reports using External IP With IIS 7

Hi All, Recently I come to situation where I need to Configure Reporting services on server having configuration: Window server 2008 and IIS 7. I need to configure reports in manner, so User can access this reports thru External IP Address. I found configuration for IIS 7.0, so user can access reports externally. To able to access the reports externally, do the steps as mentioned below:

1. Create Virtual Directory in IIS 7.0 :

2. Go to Handler Mappings :

3. Double Click on "Handler Mapping". You will get screen like the given below:

4. Now see Top Right Corner: Click On "Add Managed Handler". Here you need to fill up the info like:

Fill this info as:

Request path: Reserved.ReportViewerWebControl.axd
Type: Microsoft.Reporting.WebForms.HttpHandler
Name: Reserved-ReportViewerWebControl-axd

Thats it. Now try with External IP. You can access the reports with External IP too.

November 5, 2012

SQL SERVER: Cross tab query with PIVOT

We had a User group meeting for "Cross Tab Queries", where I have explained how to write PIVOT queries. Many times developer has an issue while writing query with PIVOT. Let me have a sample code for query with PIVOT keyword.

PIVOT is used to transform rows to column, which gives result in such a way which can be send to the user directly. Let me take an example. We have an order table where we have each order stored in a row in a table as displayed below:

ctrl_no	id	Amount	OrderDate
1000029	100016	990	10/25/2012
1000029	100018	990	10/25/2012
1000029	100016	660	10/26/2012
1000029	100018	660	10/26/2012
1000029	206007	660	10/26/2012
1000029	206007	660	10/27/2012

This information has to be saved in a row in relational database. When this information needs to be display it on the application, it needs to be displayed as below, so user can use this info for decision making:

id	10/25/2012	10/26/2012	10/27/2012
100016	990.00	660.00	NULL
100018	990.00	660.00	NULL
206007	NULL	660.00	660.00

Did you see the difference? how easy user can review the information. Lets see an query how to achieve the expected result with PIVOT keyword.

CREATE TABLE #TestTable (
	ctrl_no INT
	,id INT
	,Amount NUMERIC(18, 2)
	,OrderDate DATE
	)

INSERT INTO #TestTable(ctrl_no , id , Amount , OrderDate )
SELECT 1000029,100016,990.0000,'10/25/2012'
UNION ALL
SELECT 1000029,100018,990.0000,'10/25/2012'
UNION ALL
SELECT 1000029,100016,660.0000,'10/26/2012'
UNION ALL
SELECT 1000029,100018,660.0000,'10/26/2012'
UNION ALL
SELECT 1000029,206007,660.0000,'10/26/2012'
UNION ALL
SELECT 1000029,206007,660.0000,'10/27/2012'

SELECT id
	,[10/25/2012]
	,[10/26/2012]
	,[10/27/2012]
FROM (
	SELECT id
		,Amount
		,OrderDate
	FROM #TestTable t
	) x
PIVOT(SUM(Amount) FOR OrderDate IN (
			[10/25/2012]
			,[10/26/2012]
			,[10/27/2012]
			)) p

DROP TABLE #TestTable

Let me know if you have any question/comment.

Reference: Tejas Shah (www.SQLYoga.com)

November 2, 2012

SQL SERVER: Limit memory usage of SQL SERVER

Recently, we have found that SQL SERVER is using most of the memory on the server, due to heavy queries are running on my different teams and it freezes the whole server. Due to time constraint team doesn’t have time to optimize those queries, so we have found a way to configure SQL SERVER to not to use all available memory. We have an option to configure how much memory can be used by SQL SERVER as below:

1. Connect to the SQL SERVER instance for which we need to limit memory usage and click on properties:

SQL SERVER Limit SQL SERVER Memory usage

2. Go to “Memory”, where you can see the memory options that can be used by SQL SERVER as below:

SQL SERVER Limit SQL SERVER Memory usage SQL SERVER Properties

SQL SERVER Limit SQL SERVER Memory usage SQL SERVER Properties

By default, SQL SERVER is using maximum server memory, so to resolve the freezing issue, we need to change it as per requirement. So SQL SERVER will use only that much memory and other processes can run in the server.

Let me know your comments.

Reference: Tejas Shah (http://www.SQLYoga.com)

October 16, 2012

SQL SERVER: T-SQL to find out when database was restored

Recently, we have found that our testing database has been restored on the server and we lost our recent work. We have to identify that at what time the database has been restored, so we can know that what are the changes need to be restored again on the database.

We have found that MSDB database keeps information for each restore we have made on the server and luckily we have found the time and user we had restored the database. Let me share the simple script that I have found:

SELECT    *
FROM    msdb.dbo.RestoreHistory WITH (nolock)
WHERE    destination_database_name = '<Database Name>'
ORDER BY restore_date DESC

Reference: Tejas Shah (http://www.SQLYoga.com)

October 15, 2012

SQL SERVER: Clear Job History

Recently, we have implemented few jobs and we were testing the jobs. After our test runs successfully, we wanted to clear Job’s history, so we can have accurate job status. I have found following SQL to delete job’s history:

USE msdb
GO

EXEC dbo.sp_purge_jobhistory
@job_name = '<Job Name>'

This will clear all history for the specified job. If you wanted to clear job history up to specific date, you can use following:

USE msdb
GO

EXEC dbo.sp_purge_jobhistory
@job_name = '<Job Name>' ,
@oldest_date='2012-10-10'

If you wanted to clear job history for ALL SQL jobs, you should just execute:

USE msdb
GO

EXEC dbo.sp_purge_jobhistory

Reference: Tejas Shah (http://www.SQLYoga.com)

October 11, 2012

SQL SERVER: Configure notification to send an email when JOB fails

In my previous post, T SQL to display Job history, I have mentioned to get list with the job statuses. One of my developer asked me to share, How to configure Notification to send an email when Job fails. Developers problem is, he is getting empty dropdown while configuring notification as shown in below figure:

SQL Yoga Configure notification to send an email when JOB fails #1

Here, This dropdown contains list of Operators, so we have to create operators to whom we can send a notification email. Its very simple to configure operator, see below:

SQL Yoga Configure notification to send an email when JOB fails, create Operator #2

Now, we have created Operator, so, lets set it up for the job as below:

SQL Yoga Configure notification to send an email when JOB fails #3

Now, Mail will be send to the email specified in “ErrorEmails” operator.

Note: Make sure to Configure Database email to send an email from the SQL SERVER.

Reference: Tejas Shah (http://www.SQLYoga.com)

October 10, 2012

SQL SERVER: T-SQL to display Job history

We have multiple jobs running on the server as per the schedules. We need to have the status of the each job at the end of the day, so we can know that which jobs runs successfully and which gets failed.

We have found the table, sysjobhistory, which contains history and get the list as per oyur requirements. Let me share the query:

SELECT
    j.name As JobName,
    run_date As RunDate,
    RIGHT('000000' + CONVERT(varchar(6), Run_Time), 6) AS RunTime,
    CASE h.run_Status
        WHEN 0 THEN 'Failed'
        WHEN 1 THEN 'Succeeded'
        WHEN 2 THEN 'Retry'
        WHEN 3 THEN 'Cancelled'
    ELSE ''
    END AS JobStatus,
    RIGHT('000000' + CONVERT(varchar(6), run_duration), 6) As JobDurationinHHMMSS
FROM msdb..sysjobhistory h
INNER JOIN msdb..sysjobs j on h.job_id = j.job_id
    AND h.step_id = 0
ORDER BY j.Name, h.run_date

Here, we have used “h.step_id = 0”, as we just concern about SQL server job status, we are not concerned about each step of the job. This query gives us result as follows:

We have also configured, Notification email, which sends an email whenever job is getting failed. This query is used to review all job statuses together. Please let me know your comments

Reference: Tejas Shah (http://www.SQLYoga.com)

September 29, 2012

SQL SERVER: SSMS, Allow to create Stored procedure though table doesn’t exists

We are working on to synchronize our new SQL instance, with existing database and need to make sure all SQL OBJECTS are created on the SQL server instance, so we can execute the same stored procedures from the new SQL instance.

Our assignment is to create same replica of existing database to new SQL instance. We were also pretty much sure because all our Stored Procedures are also created on the new instance. As soon as we try to execute the stored procedure, we are getting, very simple error like:

Invalid object name 'XXXXXX'.

When we debug that, we come to know that TABLES are not created on the new SQL instance because of one error. Our main question here is: How come SQL SERVER allows to create Stored procedures, if table doesn’t exists?

After review it, we come to know that SSMS 2012 has an option, that we can configure this restriction to allow or not to allow, Check for object existence

Check for object existence I SQLYoga Tejas Shah

By default, "Check for object existence” is configures as FALSE, so SQL Server allows user to create stored procedure without checking dependent object is exists or not. Lets see one simple demo:

--Checking, if table exists or not. If it is exists, delete the table
if object_id('SQLYoga') IS NOT NULL
DROP TABLE SQLYoga

--Creating a Stored procdedure which using the object "SQLYoga" which we have just deleted
CREATE PROC StoredProcedureWithoutObject
As
BEGIN
SELECT * FROM SQLYoga
END

This is very simple example that first we have checked that, if table called “SQLYoga” exists in the database then drop that table and create a stored procedure which uses this table. As Check for object existence configuration is setup as “to allow”, we are able to create the Stored procedure though table is not exists on the table. Stored procedure won’t be executed and will give an error at the time of execution, as table doesn’t exists. To enable this configuration, go to SSMS->Tools->Options->SQL Server Object Explorer and setup “Check for object existence” to TRUE.

Please let me know your comments

November 21, 2011

SQL SERVER: Develop Reports with RDLC (Asp.Net)

As, I mentioned in my post, Load Reports without SQL SERVER Reporting Service with Asp.Net, we can develop a report without SQL SERVER Reporting Service. That is very simple to do with Microsoft Visual Studio. Please follow the following steps to generate simple report which can be load in browser without SQL SERVER Reporting Service.

We need to follow following steps to generate simple report with RDLC:
1. Create RDLC file.
2. Create Dataset from Report Data Source.
3. Design the Report
4. Runtime pass information to Report Data Source, so report will be generated with Data
Let's create one simple web application with RDLC report.
1. Create RDLC file:

In Solution Explorer, add a new folder and name it as "Reports".
Right click on "Reports", select "Add" and click on" New Items".
Give preferable name to report with extension RDLC and click Add.

2. Create Dataset from Report Data Source:

Click on "Report Data" tab displayed on left side of the screen and in case, it is not displayed go to "View" menu and click on "Report Data".
Click on "New" and select "Dataset" as displayed in following screenshot:

3. If your "Data Source" is listed in options, select it from there, else click on "New".

4. If your "Connection" is listed in options, select it from there, else click on "New Connection", to make your connection.

5. Once "Connection" is selected, select your Table/View/Stored Procedure/Function, from which you need to build your report and give appropriate name to Dataset:

6. Once you have selected DB Object in Dataset, you can find out all the columns that are available in selected dataset as follows:

7. Once you have this dataset, you will also find that one XSD file is also created in App_code folder, with the same schema, which is used to provide schema definition to RDLC file

3. Design the RDLC Report:
In Step #2, we have created Dataset with columns that needs to be displayed on the report. Now its time to use that Dataset and design the report.
You should drag, "Table" from "Toolbox" and assign property "Dataset" created Dataset in Step #2.

RDLC, allows you to design your report with schema that you have selected as DataSet

4. Runtime pass information to Report Data Source, so report will be generated with Data:
So far, we have done report designing, now its time to pass actual data to the Report Data Source, so report will be generated with actual Data. To display report on the browser, we have to use "Microsoft Reporting WebForms", which will load the report in the browser with ASPX page. Please follow the steps to pass information to RDLC Report:

Add an "aspx" page in the solution.
We have to use "Report Viewer" control on that page, in which our Report will be displayed
We also need to add few lines of code, to dynamically pass the information (actual data) to the Report Data Source as follows:

using System;
using System.Configuration;
using System.Data;
using System.Data.Common;
using System.Web.UI;
using Microsoft.Practices.EnterpriseLibrary.Data;
using Microsoft.Practices.EnterpriseLibrary.Data.Sql;
using Microsoft.Reporting.WebForms;
using System.Collections.Generic;
using System.Linq;
using System.Web.UI.WebControls;
using System.Data;
using DataAccessLayer;
 
public partial class Reports_ProjectDetail : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
          
               string connectionString = ConfigurationManager.ConnectionStrings["PISConnectionString"].ConnectionString;
               Database db = new SqlDatabase(connectionString);
               DbCommand command = db.GetStoredProcCommand("ReportProjectDetail");
        DataSet dataset = db.ExecuteDataSet(command);
               ReportDataSource datasource = new ReportDataSource("DataSet1", Dataset.Tables[0]);
        ReportViewer1.LocalReport.DataSources.Clear();
        ReportViewer1.LocalReport.DataSources.Add(datasource);
        ReportViewer1.LocalReport.Refresh();
        ReportViewer1.Visible = true;      
 }
    }
 
   
}

Let me explain how it works:

1. On Page load, we call one stored procedure to get data from database. Here I have used Microsoft Application block to connect to database and get the information
2. Once, we have the data in DataSet, we have created new "Report Data Source" with the SAME name: "Dataset1" and assign result table as per #1 and assign it to ReportViewer
3. And at last we refresh ReportViewer to display the information as per Datasource provided.

This report is ready and you can export it in Excel, PDF, Word etc. This example is developed in Microsoft Visual Studio 2010

Let me know your comments and difficulties, if any

Reference: Tejas Shah (www.SQLYoga.com)