import { Constructable, TableType } from "../util.ts";
import { SqlSelectable } from "../SqlStatement.ts";
import { ChainSelectAfterFirstFrom, ChainSelect, SelectAsNameOption, OrderByParam } from "./select_chain.ts";
export declare class SelectChainAfterSelect<T extends TableType> implements ChainSelect<T> {
    #private;
    constructor(sql: string);
    from(selectable: Constructable<SqlSelectable | string>, option?: SelectAsNameOption): ChainSelectAfterFirstFrom<T>;
    toString(): string;
}
/**
 * 生成 ORDER BY 语句
 * @public
 * @example
 * ```ts
 *
 * orderBy([]) // ""
 * orderBy({}) // ""
 * orderBy() // ""
 *
 * // 以下生成 "\nORDER BY age DESC NULLS FIRST,num ASC"
 * orderBy("age DESC NULLS FIRST,num ASC");
 * orderBy(["age DESC NULLS FIRST", "num ASC"]);
 * orderBy([
 *    { key: "age", asc: false, nullLast: false },
 *    { key: "num", asc: true },
 *  ]);
 *
 * ```
 */
export declare function orderBy(by?: Constructable<OrderByParam | void>): string;