| public Max ( string columnName ) : IFunctionOrFrom | ||
| columnName | string | |
| Результат | IFunctionOrFrom | |
public void MaxThrowsArgumentExceptionForNullColumnAlias()
{
var sqlBuilder = new SelectSqlBuilder(SqlCharacters.Empty);
var exception = Assert.Throws<ArgumentException>(
() => sqlBuilder.Max("Column", null));
Assert.Equal(ExceptionMessages.ArgumentNullOrEmpty.FormatWith("columnAlias"), exception.Message);
}
public void SelectMaxWithOtherColumn()
{
var sqlBuilder = new SelectSqlBuilder(SqlCharacters.Empty, "Id");
var sqlQuery = sqlBuilder
.Max("CreditLimit")
.From(typeof(Customer))
.Where("CustomerStatusId").IsEqualTo(CustomerStatus.Active)
.ToSqlQuery();
Assert.Equal("SELECT Id,MAX(CreditLimit) AS CreditLimit FROM Sales.Customers WHERE (CustomerStatusId = ?)", sqlQuery.CommandText);
Assert.Equal(1, sqlQuery.Arguments.Count);
Assert.Equal(DbType.Int32, sqlQuery.Arguments[0].DbType);
Assert.Equal(CustomerStatus.Active, sqlQuery.Arguments[0].Value);
}
public void SelectMaxWithSqlCharacters()
{
var sqlBuilder = new SelectSqlBuilder(MsSqlCharacters.Instance, (string)null);
var sqlQuery = sqlBuilder
.Max("CreditLimit")
.From(typeof(Customer))
.Where("CustomerStatusId").IsEqualTo(CustomerStatus.Active)
.ToSqlQuery();
Assert.Equal("SELECT MAX([CreditLimit]) AS CreditLimit FROM [Sales].[Customers] WHERE ([CustomerStatusId] = @p0)", sqlQuery.CommandText);
Assert.Equal(1, sqlQuery.Arguments.Count);
Assert.Equal(DbType.Int32, sqlQuery.Arguments[0].DbType);
Assert.Equal(CustomerStatus.Active, sqlQuery.Arguments[0].Value);
}
public void SelectMaxWithAlias()
{
var sqlBuilder = new SelectSqlBuilder(SqlCharacters.Empty, (string)null);
var sqlQuery = sqlBuilder
.Max("CreditLimit", columnAlias: "MaxCreditLimit")
.From(typeof(Customer))
.Where("CustomerStatusId").IsEqualTo(CustomerStatus.Active)
.ToSqlQuery();
Assert.Equal(1, sqlQuery.Arguments.Count);
Assert.Equal(CustomerStatus.Active, sqlQuery.Arguments[0]);
Assert.Equal("SELECT MAX(CreditLimit) AS MaxCreditLimit FROM Sales.Customers WHERE (CustomerStatusId = ?)", sqlQuery.CommandText);
}