/** @public */
export type ConditionParam = string | readonly string[];
/** @public */
export type Constructable<T> = T | (() => T);
/** @public */
export type SelectParam = string | readonly string[] | Record<string, string | boolean>;
/**
 * @public
 * @example
 * ```ts
 * selectColumns({c1: true, c2: "count(*)", c3: "column"})  //  "c1,count(*) AS c2,column as c3"
 * selectColumns("c1,count(*) AS c2,column as c3")  //  "c1,count(*) AS c2,column as c3"
 * ```
 */
export declare function selectColumns(columns: Constructable<SelectParam>): string;
/**
 * 推断表插入类型
 * @public
 * @param T - 表格创建类型
 * @param Pa - 可选列
 */
export type ToInsertType<T extends {
    [key: string]: any;
}, Pa extends keyof T = never> = {
    [key in keyof T as key extends Pa ? never : null extends T[key] ? never : key]: T[key];
} & {
    [key in keyof T as null extends T[key] ? key : key extends Pa ? key : never]?: T[key];
};
/** @public */
export type UpdateRowValue<T extends object> = {
    [key in keyof T]?: T[key] | String;
};
/** @public */
export type TableType = {
    [key: string]: any;
};