public static string Or(ISqlCondition condition) => condition != null ? $"{S.Or} {condition.ToSql()}" : null;
public static string And(ISqlCondition condition) => condition != null ? $"{S.And} {condition.ToSql()}" : null;
public static string Or(ISqlCondition condition) => condition != null ? $"{S.Or} {condition.ToSql()}" : null;
public static string And(ISqlCondition condition) => condition != null ? $"{S.And} {condition.ToSql()}" : null;