ISqlHavingAndOr<TBuilder>.AndHaving(string left, SqlBinaryOperator sqlOperator, ISqlParameter parameter) Method

.NET Standard 2.x

Adds the AND logical operator and a search condition to the HAVING clause. Specifies a SQL expression to the left of the operator and a SQL parameter to the right of the operator.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  TBuilder AndHaving(string left, SqlBinaryOperator sqlOperator, ISqlParameter parameter);

Parameters

left System.String

A SQL expression to the left of the operator.

SqlBinaryOperator SnapObjects.Data.SqlBinaryOperator

An enumeration value of SqlBinaryOperator, which is the operator to test the two expressions on the left and right.

parameter SnapObjects.Data.ISqlParameter

An ISqlParameter object which represents a SQL parameter to the right of the operator.

It can be created by calling the SqlBuilder.Parameter method.

Returns

TBuilder

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

Examples

The following code example demonstrates how to use the AndHaving method to add an AND condition to the HAVING clause.

using SnapObjects.Data;
using System;

namespace Appeon.ApiDoc.ISqlHavingAndOrExamples
{
    public class AndHavingExample
    {
        private readonly SchoolContext _context;

        public AndHavingExample(SchoolContext dataContext)
        {
            // Sets the data context
            _context = dataContext;
        }

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

            // Groups "StudentGrade" table by StudentID and CourseID, and gets the sum of Grade of each group.
            // Specifies the HAVING condition for group as "StudentID > 0" and CourseID smaller than the input parameter.
            // The value of input parameter is specified when the SQL is executed.
            sqlQueryBuilder
                .Select("StudentID")
                .Select("sum(Grade)")
                .From("StudentGrade")
                .GroupBy("StudentID, CourseID")
                .HavingRaw("StudentID > 0")
                .AndHaving("StudentID",
                           SqlBinaryOperator.LessThan,
                           SqlBuilder.Parameter<int>("studentid"));

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

            Console.WriteLine(sql);

            // Executes the SQL and specifies "10" for the input parameter.
            var studentGrade = _context.SqlExecutor.Select<DynamicModel>(sql, 10);

            /*This code example produces the following output:           
            SELECT
                [StudentID],
                sum(Grade)
            FROM [StudentGrade]
            GROUP BY
                [StudentID],
                [CourseID]
                HAVING ([StudentID] > 0
                AND [StudentID] < @studentid)
           */
        }
    }
}

Applies to

.NET Standard

2.x