ISqlJoinBuilder.LeftJoinRaw(string joinClause) Method

.NET Standard 2.x

Uses the LEFT OUTER JOIN operator to join the original table source directly with a raw SQL to create a joined table.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  ISqlJoinOnBuilder LeftJoinRaw(string joinClause);

Parameters

joinClause System.String

A string of raw SQL after the LEFT OUTER JOIN keyword.

Returns

SnapObjects.Data.ISqlJoinOnBuilder

Returns an ISqlJoinOnBuilder object that can be used to create the condition on which the join is based.

Examples

The following code example joins one table with another using the LeftJoinRaw method.

using SnapObjects.Data;
using System;

namespace Appeon.ApiDoc.ISqlJoinBuilderExamples
{
    public class LeftJoinRawExample
    {
        private readonly SchoolContext _context;

        public LeftJoinRawExample(SchoolContext dataContext)
        {
            // Sets data context.
            _context = dataContext;
        }

        public void Example1()
        {
            var sqlQueryBuilder = new SqlQueryBuilder();

            // Gets DepartmentID values and Name values from the "Department" table, and Title values from the "Course" table.
            // Sets the condition to join the "Department" table and the "Course" table:
            // Department.DepartmentID = Course.DepartmentID.
            sqlQueryBuilder
                .Select("Department.DepartmentID")
                .Select("Department.Name")
                .Select("Course.Title")
                .From("Department")
                .LeftJoinRaw("Course On Department.DepartmentID = Course.DepartmentID");

            // Converts to raw SQL for the database corresponding to the data context.
            string sql = sqlQueryBuilder.ToSqlString(_context);

            Console.WriteLine(sql);
            
            /*This code example produces the following output:           
              SELECT
                [Department].[DepartmentID],
                [Department].[Name],
                [Course].[Title]
              FROM [Department]
              Left JOIN [Course]
              ON [Department].[DepartmentID] = [Course].[DepartmentID]
            */
        }
    }
}

Applies to

.NET Standard

2.x