export declare const DB_DATETIME_EXPR = "yyyy-MM-dd HH:mm:ss.SSSS";
export declare const formatDate: (date?: any) => string;
/**
 *
 * @param expr format expression like yyyy-MM-dd,default yyyyMMdd
 * @param date Date object or number or date string ,undefined will now
 * @returns string
 */
export declare const formatDateExpr: (date?: any, expr?: string) => string;
/**
 *
 * @param date
 * string yyyy-MM-dd
 * number ms
 * date
 * @param expr
 * @returns
 */
export declare const formatDateTime: (date?: any, expr?: string) => string;
/**
 * @see https://date-fns.org/v4.1.0/docs/format
 * 2024-06-11 17:15:50.560170
 * @param input number |string Date
 * @returns string
 */
export declare const convertDBTimeString: (input: string | number | Date) => string;