ISqlWhereAndOr<TBuilder>.AndWhere(string left, ISqlBuilder sqlBuilder) Method

.NET Standard 2.x

Adds the AND logical operator and a search condition to the WHERE clause; and specifies a SQL expression on the left of the operator and a SQL subquery on the right. The operator is '='.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  TBuilder AndWhere(string left, ISqlBuilder sqlBuilder);

Parameters

left System.String

A SQL expression on the left of the operator.

sqlBuilder SnapObjects.Data.ISqlBuilder

An ISqlBuilder object which represents a SQL subquery on the right of the operator.

Returns

TBuilder

Returns the TBuilder object which can be used to add more search conditions to the current WHERE clause.

Examples

The following code example demonstrates how to use the AndWhere method to add an AND condition to the WHERE clause. In this example, the AND condition uses the result set of a subquery and the default operator "=".

using SnapObjects.Data;
using System;

namespace Appeon.ApiDoc.ISqlWhereAndOrExamples
{
    public class AndWhereExample
    {
        private readonly SchoolContext _context;

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

        public void Example5()
        {

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

            // Defines a subquery.
            var deptsql = new SqlQueryBuilder();
            deptsql.Select("DepartmentID")
                .From("Department")
                .Where("Name", SqlBuilder.Parameter<string>("id"));

            // Defines a SQL statement and adds an AND condition to WHERE clause:
            // a.DepartmentID equal to the result of a subquery
            sqlbuilder.Select("Title")
                .From("Course", "a")
                .Where("CourseID", SqlBinaryOperator.GreaterThan,
                      SqlBuilder.Parameter<int>("courid"))
               .AndWhere("a.DepartmentID", deptsql);

            string sql = sqlbuilder.ToSqlString(_context);

            Console.WriteLine(sql);

            /*This code produces the following output:

            SELECT
            [Title]
            FROM [Course] AS [a]
            WHERE ([CourseID] > @courid
            AND [a].[DepartmentID] = (SELECT
            [DepartmentID]
            FROM [Department]
            WHERE ([Name] = @id)))
           */

        }
    }
}

Applies to

.NET Standard

2.x