ISqlJoinBuilder.InnerJoinRaw(string joinClause, string builderAlias) Method

.NET Standard 2.x

Uses the INNER JOIN operator to join the original table source directly with a raw SQL to create a joined table. You need to specify an alias for the raw SQL.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  ISqlJoinOnBuilder InnerJoinRaw(string joinClause, string builderAlias);

Parameters

joinClause System.String

A string of raw SQL after the INNER JOIN keyword.

builderAlias System.String

The alias for the raw SQL.

Returns

SnapObjects.Data.ISqlJoinOnBuilder

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

Examples

The following code example demonstrates how to join a table with another using the InnerJoinRaw method.

using SnapObjects.Data;
using System;

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

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

        public void Example2()
        {
            var sqlQueryBuilder = new SqlQueryBuilder();

            // Defines a query "C" to get the count of courses in each department from the "Course" table.
            // Gets DepartmentID and Name from the "Department" table, and the count of courses from the derived table.
            // Sets to join "Department" table and the derived table by: Department.DepartmentID = C.DepartmentID.            
            sqlQueryBuilder
                .Select("Department.DepartmentID")
                .Select("Department.Name")
                .Select("C.CourseCount")
                .From("Department")
                .InnerJoinRaw("(Select DepartmentID, count(1) as CourseCount From " +
                    "Course  group by DepartmentID ) C " +
                    "On Department.DepartmentID = C.DepartmentID"
                    , "Course");

            // 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],
                [C].[CourseCount]
              FROM [Department]
              Inner JOIN (SELECT
                            [DepartmentID],
                            COUNT(1) AS [CourseCount]
                          FROM [Course]
                          GROUP BY
                            [DepartmentID] ) [C]
              ON [Department].[DepartmentID] = [C].[DepartmentID]
            */
        }
    }
}

Applies to

.NET Standard

2.x