bigint

问题 I am doing a little research for a problem that might occur someday. Lets say you have an InnoDB MySQL table with an id and a name field. the id field has BIGINT(20) and is AUTO_INCREMENT plus its the primary key. What do you do in a case that this table is full which means we have reached the limit on the id and no auto increment number can be generated anymore. 回答1: Let's assume a table structure like: CREATE TABLE `tbl` ( `id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT, PRIMARY KEY (`id`) );

问题 I have Customer_Telephone_Number value in varchar in below side. Customer_Telephone_Number value : (222)-3333-333 INSERT INTO DATABASE_1.dbo.CUSTOMER_TABLE ( Customer_Telephone_Number ) Select CONVERT(BIGINT,Customer_Telephone_Number) from DATABASE_2.DBO.CUSTOMER_TABLE If ı try to insert Customer_Telephone_Number value to Database_1 , i get below exception. Error converting data type varchar to bigint. So how can i solve this problem or can i remove "(" and ")" to solve problem ? Any help

问题 How could I create a uniqueidentifier ID column and a unique nvarchar(256) email address column in SQL Azure Federation? I'm not a SQL guy, so I don't know how to set a unique constraint or if it's possible to do that in a federated database. Edit: I found a TSQL query to create a unique constraint, but I'm getting the following error: "A unique or clustered index on a federated table must contain the federated column" I think my federated column is the ID column. 回答1: just follow what the

问题 I need help to convert a bigint value into a datetime value using SQL Server. Example value 634254092190100000 How to convert to datetime value? So far this is what I have but getting an error: Arithmetic overflow error converting expression to data type int select dateadd(s, convert(bigint, 632979854880200000) / 1000, convert(datetime, '1-1-1970 00:00:00')) 回答1: Please do : SELECT CAST((YOURVALUE- 599266080000000000) / 864000000000 AS datetime) For exemple : SELECT CAST((635307578922100000 -

问题 I need a random 256-bit unsigned number. I discovered that there is the RandBigInt trait with the method gen_biguint() , but I am having a tough time finding an implementation for it. I tried doing this some time ago for BigInt . The crates have been updated since. This is how I am using it to get a BigUint now. extern crate num; extern crate rand; use num::bigint::{BigInt, BigUint, RandBigInt}; fn main() { let mut rng = rand::thread_rng(); let mut n: BigUint = BigUint::default(); loop { let

问题 Why a MYSQL column of type bigint cannot be casted to Java Long? When using JPA.em().createNativeQuery("select ...").getResultList() and the select result is a column from the type bigint, you can't assign the result to a Long variable. The cast causes a run time exception "java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long" This of course can be solved by using a bigInteger variable and then ".longValue()" I'm trying to understand what is the underlying

问题 Are there known algorithms which will take a big integer with n digits encoded in one base/radix and convert it to another arbitrary base? (Let's say from base 7 to base 19.) n can be really big, like more than 100 000 digits, so I am looking for something better than O( n 2 ) run time. I have seen some algorithms that can multiply two huge integers using the Fast Fourier Transform (FFT), with the theoretical complexity of O( n log n ), where n is the number of digits, so I wonder if

问题 I have a combinatorics problem for which I want to be able to pick an integer at random between 0 and a big integer. Inadequacies of my current approach Now for regular integers I would usually write something like int rand 500; and be done with it. But for big integers, it looks like rand isn't meant for this. Using the following code, I ran a simulation of 2 million calls to rand $bigint : $ perl -Mbigint -E 'say int rand 1230138339199329632554990773929330319360000000 for 1 .. 2e6' > rand

问题 I have bigInt: 635307578922100000 which I need to convert to DateTime . I've tried few ways to do this: SELECT DATEADD(S, CONVERT(bigint,635307578922100000) / 1000, CONVERT(DATETIME, '1-1-1970 00:00:00')) and: SELECT DATEADD(ms, 635307578922100000 / 86400000, (635307578922100000 / 86400000) +25567) While I found the codes above work with bigInts like: 1283174502729 , with my bigInt I get the following error: Msg 8115 ... Arithmetic overflow error converting expression to data type datetime.

问题 I have a BIGINT field as an auto increment and primary key on a MySQL Innodb table, running MySQL Community Server 5.6.11. After calling a basic INSERT statement, and then calling SELECT LAST_INSERT_ID(), I'm always returned 0, even though the INSERT statement was sucessful. Any ideas why this might be happening. UPDATE: Here is my table definition CREATE TABLE `Booking` ( `BookingId` bigint(20) NOT NULL AUTO_INCREMENT, `HotelId` int(11) NOT NULL, `AgentId` int(11) NOT NULL DEFAULT '0',