ISqlFromBuilder.FromRaw(string fromClause) Method

.NET Standard 2.x

Adds a table source (table, view, or derived table), specified by a raw SQL, to the FROM clause of the current object.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  ISqlFromBuilder FromRaw(string fromClause);

Parameters

fromClause System.String

A string of raw SQL which is a table source (table, view, or derived table).

Actually, you can write any raw SQL if the SQL statement is valid.

Returns

SnapObjects.Data.ISqlFromBuilder

Returns the current ISqlFromBuilder object.

Examples

The following code example demonstrates how to use the FromRaw(string fromClause) method. It creates a derived table by a subquery and retrieves all the records from the derived table.

using SnapObjects.Data;
using System;

namespace Appeon.ApiDoc.ISqlFromBuilderExamples
{
    public class FromRawExample
    {
        private SchoolContext _context;

        public FromRawExample(SchoolContext dataContext)
        {
            // Sets the Data Context
            _context = dataContext;
        }

        public void Example1()
        {

            // Declares SqlQueryBuilder.
            var sqlbuilder = new SqlQueryBuilder();

            // Defines a SQL statement to create a derived table by a subquery and retrieve all the records from the derived table.
            sqlbuilder.Select("*")
                .FromRaw("(select name, budget from department) as dept");

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

            Console.WriteLine(sql);
            
            /*This code produces the following output:
            
            SELECT
            *
            FROM (SELECT
            [name],
            [budget]
            FROM [department]) AS [dept]      
            */
        }
    }
}

Applies to

.NET Standard

2.x