HTTP Get method from MSSQL

If you want to call a URL and store the response of that url use this function:

ALTER function [dbo].[GetHttp]
(
@url varchar(8000)
)
returns varchar(8000)
as
BEGIN
DECLARE @win int
DECLARE @hr  int
DECLARE @text varchar(8000)

EXEC @hr=sp_OACreate 'WinHttp.WinHttpRequest.5.1',@win OUT
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAMethod @win, 'Open',NULL,'GET',@url,'false'
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAMethod @win,'Send'
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAGetProperty @win,'ResponseText',@text OUTPUT
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OADestroy @win
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

RETURN @text


END

Http Post from MSSQL

Call the HTTP post using MSSQL script :

ALTER function [dbo].[POSTHttp]
(
@url varchar(8000),
@data varchar(2000)
)
returns varchar(8000)
as

BEGIN
DECLARE @win int
DECLARE @hr  int
DECLARE @text varchar(8000)

EXEC @hr=sp_OACreate 'WinHttp.WinHttpRequest.5.1',@win OUT
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAMethod @win, 'Open',NULL,'POST',@url,'false'
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAMethod @win, 'setRequestHeader',NULL, 'Content-type'
, 'application/x-www-form-urlencoded'
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAMethod @win,'Send',null,@data
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAGetProperty @win,'ResponseText',@text OUTPUT
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OAGetProperty @win,'ResponseText',@text OUTPUT
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

EXEC @hr=sp_OADestroy @win
IF @hr <> 0 EXEC sp_OAGetErrorInfo @win

RETURN @text

END

CTE Function

CTE fucntion can be used on this way:

IF OBJECT_ID('tempdb..#dataList') IS NOT NULL
DROP TABLE #dataList


CREATE TABLE #dataList(
id            INT
,name        VARCHAR(50)
,parent        INT
,ip            INT
)


INSERT #dataList
SELECT 1    id, 'Group1'        Name, 0 Parent, 0 ip UNION ALL
SELECT 2    id, 'SubGroup1'        Name, 1 Parent, 0 ip UNION ALL
SELECT 3    id, 'Item1'            Name, 2 Parent, 1 ip UNION ALL
SELECT 4    id, 'Item2'            Name, 2 Parent, 1 ip UNION ALL
SELECT 5    id, 'Item3'            Name, 2 Parent, 1 ip UNION ALL
SELECT 6    id, 'Item4'            Name, 2 Parent, 1 ip UNION ALL
SELECT 7    id, 'SubGroup2'        Name, 1 Parent, 0 ip UNION ALL
SELECT 8    id, 'Item5'            Name, 7 Parent, 1 ip UNION ALL
SELECT 9    id, 'Item6'            Name, 7 Parent, 1 ip UNION ALL
SELECT 10    id, 'Item7'            Name, 7 Parent, 1 ip UNION ALL
SELECT 11    id, 'Item8'            Name, 7 Parent, 1 ip


--SELECT * FROM #dataList



DECLARE @id INT = 1
;WITH CTE(id, name, parent, ip)
AS
(
SELECT * FROM #dataList WHERE id = @id
UNION ALL
SELECT d.* FROM #dataList D
INNER JOIN CTE c ON d.parent = c.id
)

SELECT * FROM CTE WHERE ip = 1 ORDER BY id ASC;

Dynamic PIVOT

Sample for Dynamic PIVOT Query:

Some time we need complex cross tab result for report, that time we can use the PIVOT Query, for example we have 3 Tables and we have data like this :


IF OBJECT_ID('tempdb..#customer') IS NOT NULL
DROP TABLE #customer

CREATE TABLE #customer (
CustomerId INT,
CustomerName VARCHAR(50)
)


INSERT #customer
SELECT 1, 'Ram'
INSERT #customer
SELECT 2, 'Hari'
INSERT #customer
SELECT 3, 'Depesh'
INSERT #customer
SELECT 4, 'Sailesh'

--Select * from #customer

————————————————————————–

IF OBJECT_ID('tempdb..#LoanType') IS NOT NULL
DROP TABLE #LoanType

CREATE TABLE #LoanType (
LoanId INT,
LoanName VARCHAR(50)
)

INSERT #LoanType
SELECT 1, 'Loan-1'
INSERT #LoanType
SELECT 2, 'Loan-2'
INSERT #LoanType
SELECT 3, 'Loan-3'
INSERT #LoanType
SELECT 4, 'Loan-4'
INSERT #LoanType
SELECT 5, 'Loan-5'
INSERT #LoanType
SELECT 6, 'Loan-6'

--Select * from #LoanType

——————————————————————————

IF OBJECT_ID('tempdb..#LoanCustomer') IS NOT NULL
DROP TABLE #LoanCustomer


CREATE TABLE #LoanCustomer (
CustomerId INT,
LoanId INT,
Amount MONEY
)


INSERT #LoanCustomer
SELECT 1, 1, 500
INSERT #LoanCustomer
SELECT 2, 1, 5300
INSERT #LoanCustomer
SELECT 3, 3, 1500
INSERT #LoanCustomer
SELECT 2, 1, 2500
INSERT #LoanCustomer
SELECT 1, 6, 5500
INSERT #LoanCustomer
SELECT 2, 4, 1100
INSERT #LoanCustomer
SELECT 2, 3, 3200
INSERT #LoanCustomer
SELECT 2, 3, 3200


--Select * from #LoanCustomer

——————————————————————————–

Combine Result of three table from PIVOT Query:


DECLARE
@sql VARCHAR(MAX)
,@LoanType VARCHAR(MAX)

SELECT
@LoanType = ISNULL(@LoanType + ', ', '') + '[' + LoanName + ']'
FROM (
SELECT
DISTINCT
l.LoanName
FROM #LoanCustomer lc
INNER JOIN #LoanType l ON lc.LoanId = l.LoanId
) x



SET @sql = '
SELECT
CustomerName
,' + @LoanType +
Sample for Dynamic PIVOT


FROM (
SELECT
c.CustomerName,
l.LoanName,
lc.Amount
FROM #LoanCustomer lc
INNER JOIN #customer c ON lc.CustomerId = c.CustomerId
INNER JOIN #LoanType l ON l.LoanId = lc.LoanId
) dataList
PIVOT
(
SUM(Amount)
FOR LoanName IN(' + @LoanType+ ')
) X '

EXEC (@sql)


 

This Script is Prepared by Netra Prasad Acharya (MSSQL Developer)

MSSQL Hash Algorithms

MSSQL Hash Algorithms:

There are two forms of encryption algorithms: one-way and two-way. Two-way algorithms allow you to encrypt and decrypt data. One-way algorithms will only encrypt data without any ability to decrypt.

A hash algorithm is the simplest way to encrypt data, however, once encrypted, you can’t decrypt the data. Your data remains secure, ensuring that in order to “decrypt” the contents of a column you would first have to know the original data value.

--Different hash algorithms produce different hash values
DECLARE @TEST_VAL varchar(100)
SELECT @TEST_VAL = 'SQL Server'
SELECT HashBytes('MD5', @TEST_VAL)
SELECT @TEST_VAL = 'SQL Server'
SELECT HashBytes('SHA1', @TEST_VAL)
GO

--Hash values are case sensitive
DECLARE @TEST_VAL varchar(100)
SELECT @TEST_VAL = 'sql'
SELECT HashBytes('SHA1', @TEST_VAL)
SELECT @TEST_VAL = 'SQL'
SELECT HashBytes('SHA1', @TEST_VAL)
GO

SUBSTRING Function

See the Uses of SUBSTRING, CHARINDEX, REPLACE Functions in MSSQL.


SELECT
'3/6/2010' as OLD_FORMAT,
charindex('/','3/6/2010',1) [FIRST/POSITION],
charindex('/','3/6/2010',3) [2nd/POSITION],
replace( SUBSTRING ('3/6/2010', charindex('/','3/6/2010',1), 2),'/','') as MM,
replace(left('3/6/2010',2),'/','') as DD,
right('3/6/2010',4) as YYYY,

replace( SUBSTRING ('3/6/2010', charindex('/','3/6/2010',1), 2),'/','')+'/'+
replace(left('3/6/2010',2),'/','')+'/'+
right('3/6/2010',4) as NEW_FORMAT

Example to convert date  dd/mm/yyyy to mm/dd/yyyy

Short Cut key and formatting

MSSQL Short Cut key for query Editors:

Some easy short cut key for MSSQL Management studio or Query Editor:

CTRL + f1 = sp_help
CTRL + 1 = sp_who
CTRL + 2 = sp_lock

CTRL + R = Show/Hide Result Window
CTRL + E = Execute the SQL statement
CTRL + L = Execute with Execuation plan
CTRL + G = GOTO line number
CTRL + F = find
CTRL + H = find and replace

CTRL + SHIFT + U = Convert to Upper Case
CTRL + SHIFT + L = Convert to Lower Case

If you want to change the style of your query text editor in MSSQL Management studio:

Go to the following menu:

TOOLS  ==> OPTIONS == > ENVIRONMENT == > FONTS AND COLORS

MSSQL Backup to Map Drive

MSSQL Backup to Map Drive:

if you want to backup a SQL Server database to a mapped drive use the following script
1) First it will create Map Drive in Local PC
2) Backup the Database.
3) Delete the Map Drive, so that next time the same script can use again.

EXEC master..xp_cmdshell 'net use z: "\\192.168.1.93\share" password /user:user1'
GO

BACKUP DATABASE DB1
to disk='z:\db1.bak' with init
GO

EXEC master..xp_cmdshell 'net use z: /delete'
GO

MSSQL MAX, MIN from the column data

How to compare and find the MAX, MIN from the column data?
Some time we want to find the MAX, MIN form our own data or Colunm data On that case MSSQL dose not have system function to do it but here is the solution to do it.

See the example to find Max value:

-- select dbo.FuncGetMax(123,5,null,null,null)

ALTER FUNCTION [dbo].[FuncGetMax] (@str float, @str1 float, @str2 float, @str3 float,@str4 float)
RETURNS float
BEGIN

Declare @result int

-- First compare
if @str > @str1
set @result=@str
else
set @result=@str1

-- 2nd compare
if @str2 is null OR @result > @str2
set @result=@result
else
set @result=@str2

-- 3rd compare
if @str3 is null OR @result > @str3
set @result=@result
else
set @result=@str3

-- 4th compare
if @str4 is null OR @result > @str4
set @result=@result
else
set @result=@str4

return @result

end

See the example to find MIN value:


-- select dbo.FuncGetMIN(123,5,null,null,null)

Alter FUNCTION [dbo].FuncGetMIN(@str float, @str1 float, @str2 float, @str3 float,@str4 float)
RETURNS float
BEGIN

Declare @result int

-- First compare
if @str < @str1
set @result=@str
else
set @result=@str1

-- 2nd compare
if @str2 is null OR @result < @str2
set @result=@result
else
set @result=@str2

-- 3rd compare
if @str3 is null OR @result < @str3
set @result=@result
else
set @result=@str3

-- 4th compare
if @str4 is null OR @result < @str4
set @result=@result
else
set @result=@str4

return @result

end

MSSQL Cross-Tab Query

Example Script for MSSQL Cross-Tab Query

Create table #Table
(
yearofJoining int,
EmpId int,
Deptid int
)
GO


insert into #Table select 1990,1,1
insert into #Table select 1991,2,2
insert into #Table select 1990,3,4
insert into #Table select 1991,4,2
insert into #Table select 1990,5,1
insert into #Table select 1990,6,3
insert into #Table select 1992,7,3
insert into #Table select 1990,8,4
insert into #Table select 1993,9,1
insert into #Table select 1994,10,2
insert into #Table select 1990,11,3
insert into #Table select 1995,12,3
insert into #Table select 1995,14,3
insert into #Table select 1995,15,3
insert into #Table select 1995,16,6
GO

--Original Cross Tab query
select YearofJoining,
count(case [DeptId] when 1 then 1 else null end) as [Department-1],
count(case [DeptId] when 2 then 1 else null end) as [Department-2],
count(case [DeptId] when 3 then 1 else null end) as [Department-3]
from #Table where deptid in(1,2,3)
group by Yearofjoining

Out put:

YearofJoining Department-1 Department-2 Department-3
------------- ------------ ------------ ------------
1990 2 0 2
1991 0 2 0
1992 0 0 1
1993 1 0 0
1994 0 1 0
1995 0 0 3

PIVOT Example:


SELECT YearofJoining, [1] as [Department-1],[2] as [Department-2],
[3] as [Department-3] FROM
(SELECT YearOfJoining,Deptid from #Table) p
PIVOT
( Count(DeptId) for DEPTID in ([1],[2],[3]))
AS pvt
ORDER BY Yearofjoining

MSSQL Group by and Sum

Here are some example for MSQL SUM function and GROUP BY:


USE AdventureWorks;
GO
SELECT Color, SUM(ListPrice), SUM(StandardCost)
FROM Production.Product
WHERE Color IS NOT NULL
AND ListPrice != 0.00
AND Name LIKE 'Mountain%'
GROUP BY Color
ORDER BY Color;
GO


Alternate way.

USE AdventureWorks ;
GO
SELECT Color, ListPrice, StandardCost
FROM Production.Product
WHERE Color IS NOT NULL
AND ListPrice != 0.00
AND Name LIKE 'Mountain%'
ORDER BY Color
COMPUTE SUM(ListPrice), SUM(StandardCost) BY Color;
GO

Other Example:

USE AdventureWorks;
GO
SELECT Color, SUM(ListPrice), SUM(StandardCost)
FROM Production.Product
GROUP BY Color
ORDER BY Color;
GO


MSSQL Case

Here are some example of MSSQL Cases:

USE AdventureWorks;
GO
SELECT ProductNumber, Category =
CASE ProductLine
WHEN 'R' THEN 'Road'
WHEN 'M' THEN 'Mountain'
WHEN 'T' THEN 'Touring'
WHEN 'S' THEN 'Other sale items'
ELSE 'Not for sale'
END,
Name
FROM Production.Product
ORDER BY ProductNumber;
GO

Other way:

USE AdventureWorks;
GO
SELECT ProductNumber, Name, 'Price Range' =
CASE
WHEN ListPrice = 0 THEN 'Mfg item - not for resale'
WHEN ListPrice < 50 THEN 'Under $50' WHEN ListPrice >= 50 and ListPrice < 250 THEN 'Under $250' WHEN ListPrice >= 250 and ListPrice < 1000 THEN 'Under $1000'
ELSE 'Over $1000'
END
FROM Production.Product
ORDER BY ProductNumber ;
GO

MSSQL EXISTS and IF EXISTS

Using NULL in a subquery to still return a result set:

USE AdventureWorks ;
GO
SELECT DepartmentID, Name
FROM HumanResources.Department
WHERE EXISTS (SELECT NULL)
ORDER BY Name ASC ;


Comparing queries by using EXISTS and IN

USE AdventureWorks ;
GO
SELECT a.FirstName, a.LastName
FROM Person.Contact AS a
WHERE EXISTS
(SELECT *
FROM HumanResources.Employee AS b
WHERE a.ContactId = b.ContactID
AND a.LastName = 'Johnson');
GO

Usage of IN :

USE AdventureWorks ;
GO
SELECT a.FirstName, a.LastName
FROM Person.Contact AS a
WHERE a.LastName IN
(SELECT a.LastName
FROM HumanResources.Employee AS b
WHERE a.ContactId = b.ContactID
AND a.LastName = 'Johnson');
GO

Comparing queries by using EXISTS and = ANY


USE AdventureWorks ;
GO
SELECT DISTINCT s.Name
FROM Sales.Store s
WHERE EXISTS
(SELECT *
FROM Purchasing.Vendor v
WHERE s.Name = v.Name) ;
GO


Usage of ANY:

USE AdventureWorks ;
GO
SELECT DISTINCT s.Name
FROM Sales.Store s
WHERE s.Name = ANY
(SELECT v.Name
FROM Purchasing.Vendor v ) ;
GO


Comparing queries by using EXISTS and IN

USE AdventureWorks;
GO
SELECT c.FirstName, c.LastName, e.Title
FROM Person.Contact c JOIN HumanResources.Employee e
ON e.ContactID = c.ContactID WHERE EXISTS
(SELECT *
FROM HumanResources.Department d
WHERE e.DepartmentID = d.DepartmentID
AND d.Name LIKE 'P%');
GO


Usage of IN :

USE AdventureWorks;
GO
SELECT c.FirstName, c.LastName, e.Title
FROM Person.Contact c JOIN HumanResources.Employee e
ON e.ContactID = c.ContactID WHERE DepartmentID IN
(SELECT DepartmentID
FROM HumanResources.Department
WHERE Name LIKE 'P%');
GO

Using NOT EXISTS

USE AdventureWorks;
GO
SELECT c.FirstName, c.LastName, e.Title
FROM Person.Contact c JOIN HumanResources.Employee e
ON e.ContactID = c.ContactID WHERE NOT EXISTS
(SELECT *
FROM HumanResources.Department d
WHERE e.DepartmentID = d.DepartmentID
AND d.Name LIKE 'P%')
ORDER BY LastName, FirstName
GO

Advance Usage of Exists

If exists(
SELECT id FROM Table1 where price > = 1000
)
begin
SELECT '>= than 10000' as MSG
print '> than 10000' -- OR you can print as out put
return;

end

MSSQL Joins

Here are some Example of SQL Joins


--The basic JOIN statement
-- JOIN:
SELECT Customer.CustomerID, TransID, TransAmt
FROM Customer JOIN Transaction
ON Customer.CustomerID = Transaction.CustomerID;

-- similar:
SELECT Customer.CustomerID, TransID, TransAmt
FROM Customer, Transaction;
where Customer.CustomerID = Transaction.CustomerID;

-- INNER JOIN
SELECT CustomerName, TransDate
FROM Customer INNER JOIN Transaction
ON Customer.CustomerID = Transaction.CustomerID;

-- LEFT OUTER JOIN
SELECT CustomerName, TransDate, TransAmt
FROM Customer LEFT OUTER JOIN Transaction
ON Customer.CustomerID = Transaction.CustomerID;

Temp Tables in MSSQL Database

Different types of temp Tables in Exists in MSSQL Database:

1) # TABLE (Local Temporary Tables)

This types of temp table is created and populated on disk, in the system database tempdb — with a session-specific identifier packed onto the name.

CREATE TABLE #TABLE
(
rowid INT,
fname VARCHAR(200)
)

2) ##TABLES  (Global Temporary Tables)

This types of Global temporary tables operate much like local temporary tables; they are created in tempdb and cause less locking and logging than permanent tables. However, they are visible to all sessions, until the creating session goes out of scope (and the global ##temp table is no longer being referenced by other sessions)

If the session is running and other session try to create the Global Temp Table than second session will get a error.
“There is already an object named ##TABLE in database. “

CREATE TABLE ##TABLE
(
rowid INT,
fname VARCHAR(200)
)

3) @TABLES (Table Variables )

This types of table variable is created in memory, and so performs slightly better than #temp tables ( less locking and logging in a table variable). A table variable might still perform I/O to tempdb (which is where the performance issues of #temp tables make themselves apparent), though the documentation is not very explicit about this.

DECLARE @table TABLE
(
rowid INT,
fname VARCHAR(200)
)


How to pass parameters dynamically

How to pass parameters dynamically?
MS-SQL has many features to call the procedure from other application and from SQL itself, See the example.
Some time you need optional parameter in Procedure then assign null as default so that it will not ask you compulsory.

CREATE PROCEDURE dbo.TESTPROCEDURE
@param1 VARCHAR(32) = NULL,
@param2 INT = NULL
AS
BEGIN
SET NOCOUNT ON

SELECT Param1 = COALESCE
(
@param1,
'@param1 was Blank'
)

SELECT Param2 = COALESCE
(
RTRIM(@param2),
'@param2 was Blank'
)
END
GO

EXEC dbo.TESTPROCEDURE @param1='HELLO', @param2=1
EXEC dbo.TESTPROCEDURE @param1='HELLO'
EXEC dbo.TESTPROCEDURE @param2=1
EXEC dbo.TESTPROCEDURE 'HELLO',1
EXEC dbo.TESTPROCEDURE 'HELLO

There are so many way to get the result from procedure, Choose any of them which you like.

Table Row in String

How to create the row data as string.

If you have table row data and you need to show all the records in a single string, use the following query.

DATA:
--------------------
Name
RAM
SHYAM
HARI
RITA

RESULT:
---------------------
Name
RAM,SHYAM,HARI,RITA

Use the following query
------------------------------------
DECLARE @strList varchar(100)
SELECT @strList = COALESCE(@strList + ', ', '') +
 CAST(Name AS varchar(5))
FROM TABLE1

SELECT @strList

There are complex example in internet but you can use this simple query to get this solutions. No need to use complex cursor to get such result.

How to parametrize OPENQUERY in MSSQL

How to parametrize OPENQUERY in MSSQL:

MSSQL has good feature of linked server between two different Database in same location or in remote location.
OPENQUERY helps you to execute your query in Linked server (remote) .

In linked server you can directly execute your query without OPENQUERY but the performance will be a issue.

As per my experience OPENQUERY is best way to access the linked servers.

If you want to pass your variable in OPENQUERY than it is so simple. Use the following way to pass your variable in OPENQUERY.

DECLARE @strDate VARCHAR(10)
DECLARE @strSql VARCHAR(8000)
DECLARE @strLinked VARCHAR(8000)

SET @strDate= '2009-01-01'

SET @strSsql= 'SELECT * FROM TABLE1 WHERE TRN_DATE =' + '''' + '''' + @strDate+ '''' + ''''

SET @strLinked= 'SELECT * FROM OPENQUERY(MYLINKEDSERVER,' + '''' + @strSql+ '''' + ')'

--############ Print and see your script
PRINT @strLinked

--############ Final Execution
EXEC(@strLinked)

As per MSDN:

Executes the specified pass-through query on the specified linked server. This server is an OLE DB data source. OPENQUERY can be referenced in the FROM clause of a query as if it were a table name. OPENQUERY can also be referenced as the target table of an INSERT, UPDATE, or DELETE statement. This is subject to the capabilities of the OLE DB provider. Although the query may return multiple result sets, OPENQUERY returns only the first one.

How to find date name in MSSQL

How to find Date Name in MSSQL:

if you want to return a weekday or date name of particular date then it is so simple in MSSQL.

See the example:

select DATENAME(dw , getDate())

This query returns today’s date name like Sunday, Monday etc.

You can pass “dw” or “weekday” as a first parameter to date name which specifies the part of date returned.

How to delete the MSSQL transaction log.

How to delete the MSSQL transaction log.

If your transaction log is big or too much large. it will utilize your space and other issue might be there, so you need to clean up the transaction log time to time. Follow the following steps and clean your LOG size.

1)  first take log backup

BACKUP LOG IMEKL TO DISK='d:\TEMP.bak' with init

2) Shrink your Database.


USE TESTDB
GO
DBCC SHRINKFILE ('TESTDB_log', EMPTYFILE);
GO


From GUI mode: Rclick  DB ==> Task ==> Shirinks ==> Database ==> specify size and press OK

3) Now see your log and file size.


SELECT name AS [File Name] , file_id, physical_name AS [Physical Name],
size/128 AS [Total Size in MB],
size/128.0 - CAST(FILEPROPERTY(name, 'SpaceUsed') AS int)/128.0
AS [Available Space In MB]
FROM sys.database_files;

MSDN:
You can reduce the default size of an empty file by using DBCC SHRINKFILE target_size. For example, if you create a 5-MB file and then shrink the file to 3 MB while the file is still empty, the default file size is set to 3 MB. This applies only to empty files that have never contained data.