In LEFT JOIN if all records of the LEFT table are returned by matching RIGHT table. If the RIGHT table is not matched then ‘NULL’ (no value) returns.LINQ is used in C # to query field objects from different types of data in the same way that we use SQL Language to query a Relational Database.
As a query, we retrieve data from Data Source based on any Specific Condition or Criteria and Access and Manipulate that Retrieved Data according to your need. The query can be of different types, but each type of query returns some kind of data collection.
In this post, I will explain Linq joins on multiple tables. I have created two tables i.e,Department, Employee.
Table Sql Script:
//Department table
CREATE TABLE [dbo].[Department](
[Id] [int] IDENTITY(1,1) NOT NULL,
[DepartmentName] [nvarchar](50) NULL,
CONSTRAINT [PK_Departments] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
//Employee Table
CREATE TABLE [dbo].[Employee](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](150) NULL,
[Address] [nvarchar](500) NULL,
[Salary] [decimal](18, 2) NULL,
[DepId] [int] NULL,
CONSTRAINT [PK_Employee_1] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
Linq Left Join With where Clouse .
Sql Query:-
select e.Name,d.DepartmentName from Employee e
LEFT JOIN Department d on e.DepId=d.Id
where e.Address='Paris'
Linq Query:-
var query = from person in db.Employees
join dep in db.Departments on person.DepId equals dep.Id into gj
from subdata in gj.DefaultIfEmpty()
where person.Address== "Paris"
select new { person.Name, DepartmentName = subdata.DepartmentName };
The post [Solved]-LEFT OUTER JOIN in LINQ With Where clause in C# appeared first on Software Development | Programming Tutorials.
Read More Articles
- Write a value which contain comma to a CSV file in c#?
- Reading CSV File with cells containing commas c#
- Split CSV with columns may contain ‘,’ Comma C#
- [Simple Way]-Cascading DropDownList in Asp.Net Mvc Using Jquery Ajax
- [Simple Way]-How to get data from database using JQuery Ajax in asp net MVC
- [Simple Way]-ASP.NET Core Upload Multiple File Web API model
- [Simple Way]- Image Upload in .NET Core Web API
- [Easy Way]-Receive File and other form data together in ASP.NET Core Web API
- Replace image in word document using C#
- How to add new rows to an existing word document table in C#
- LINQ with multiple left join and where clause
- Linq query with where clause within a where clause causes an error
- Convert this sql query to LINQ to Lambda Left Outer Join
- C# Linq query with where clause query containing a dynamic variable
- Join in LINQ within a where clause
- Isolate LINQ query to type of object in the where clause
- Filter SqlDataReader with Where Clause
- Array element in LINQ where clause causes run time error vs compile time error
- LINQ to Entities conditional where clause
- LINQ List gives null exception in where Clause
- Difference between comparing two properties and two values in Linq Where clause
- Dapper does not properly map rows selected with LEFT JOIN (splitOn)
- What's the benefits of using the method which is using "new()" over the one not using "new()" with where clause in the method in c#?
- LINQ optional where clause effect on performance
- LEFT OUTER JOIN problems
- Using a LINQ Where clause to filter by data in an associated table
- optimizing Where clause in linq
- Linq pairing two Lists of different classes with join
- Ignoring null parameter in where clause linq to sql
- Building a dynamic SQL INSERT query with Where Clause C#
- How to count filtered rows with where clause in t-sql?
- Nhibernate SetFetchMode - Inner vs Left Outer Join
- MySql Inner join of 2 table with WHERE Clauses
- Which one is faster? Query 1 Entity and make roundtrip on other related entities? or just left join it with 1 roundtrip?
- Linq to SQL valid Email Address in a where clause
- join in linq with entity framework
- How to write a Linq to SQL join query with parameter which returns columns from both table?
- Where clause on linq query against dictionary?
- Problem with SQL Command - WHERE clause
- Make a usable Join relationship with LINQ on top of a database CSV design error
- Get media elements from RSS using SyndicationFeed
- Datetime output not getting displayed when inserted in list
- Can I restrict the accessibility of a class to just another class?
- disable OnClientClick when LinkButton is disabled
- How do I cleanly write a method that takes any type of Enum to return out all of its enumerations?
- Call user control button click event when loaded dynamically
- If statement which checks if value exists and then write KML tag
- How to read from XML that has same node names in C#
- How do you select an item in a listbox based on letter of key pressed as done in this question, but in UWP?
- How to send JavaScript variable to (asp net code behind) c# without hidden field
- XML Deserialization Diffrent Objects C#
- Deserialize JSON data in C#
- Rx Show Loading(Progress Bar or something like that) If Web request takes too long
- Which list type to use?
- Is there a way to initialize properties after construction of object?
- Closing SQLite with C# in Unity
- invalidcastexception was unhandled c# error after input
- UWP ListView Drag and Drop
- Converting a String into a Valid DateTime Format
- How to edit JSON API response