autoincrement

Autoincrement uniqueidentifier in C#

Basically I want to use uniqueidentifier in similar way as identity. I don't want to insert values into it, It should just insert values automatically, different value for each row. I'm not able to set autoincrement on columns of type uniqueidentifier(the property 'autoincrement' is set to false and is not editable). ...

Creating Auto Incrementing column in Google Appengine

What is the easiest and most efficient way to create an auto-increment counter for every data row in google appengine? basically I want to give every row a unique row_number so that I can overcome the issue of only being able to get the first 1000 results in a select query. I can thus add a counter lies between condition and mine all th...

MySQL and INT auto_increment fields

Hello folks, I'm developing in LAMP (Linux+Apache+MySQL+PHP) since I remember myself. But one question was bugging me for years now. I hope you can help me to find an answer and point me into the right direction. Here is my challenge: Say, we are creating a community website, where we allow our users to register. The MySQL table where ...

Set AUTO_INCREMENT using SqlAlchemy with MySQL on Columns with non-primary keys?

I can't figure out how to set AUTO_INCREMENT on a UNIQUE column using SqlAlchemy 0.6.0 with MySQL 5. I know this can be done in MySQL, but I don't want to have to distribute extra .sql scripts in order to set up the databases for my application. I want SqlAlchemy to build the schema from within Python. As far as I have found so far, th...

Behaviour of insertion trigger when defining autoincrement in Oracle

I have been looking for a way to define an autoincrement data type in Oracle and have found these questions on Stack Overflow: Autoincrement in Oracle Autoincrement Primary key in Oracle database The way to use autoincrement types consists in defining a sequence and a trigger to make insertion transparent, where the insertion trigger...

Autonumber with Entity Framework

I want to loop through a collection of objects and add them all to a table. The destination table has an auto-increment field. If I add a single object there is no problem. If I add two objects both with the primary key of zero, the entity framework fails. I can manually specify primary keys but the whole point of trying the EF was t...

Echo autoincrement id doubt

Hi, can I print the id, even if it's autoincrement ? Because the way I'm doing I'm using an empty variable for id. $id= ""; mysql_connect(localhost,$username,$password); @mysql_select_db($database) or die ("Não conectou com a base $database"); mysql_query("INSERT INTO table1(id,...) VALUES ('".$id."',....)") or die(mysql_error()); m...

How Can I assign a sequence value to a sqlite field when the field UID value is NULL

Hi All, How I can assign a sequence value to a field "UID" which is NUll in existing sqlite table, for example table: FOO name UID A 1 B 2 C 100 D NULL E NULL F NULL what I want is table: FOO name UID A 1 B 2 C 100 D 101 E 102 F 103 Can some body help? I want to seek an alternative for using autoi...

How to force SQL Server 2008 to not change AUTOINC_NEXT value when IDENTITY_INSERT is ON ?

Hello, I got question about IDENTITY_INSERT. When you change it to ON, SQL Server automatically changes AUTOINC_NEXT value to the last inserted value as identity. So if you got only one row with ID = 1 and insert row with ID = 100 while IDENTITY_INSERT is ON then next inserting row will have ID = 101. I'd like it to be 2 without need ...

MySQL Set AutoIncrement "Ad Hoc"

Is there a way to set mysql's auto_increment to a certain integer in an "ad hoc" way - for example, N of the latest rows have been deleted in a table, so the primary key/auto_increment is N off from the actual # of rows? Is there a way to set the auto_increment to the right number, or to manually set it? This seems common, so I believe...

Is it possible to define a serial datatype which autoincrements when updating a row?

when a new row is added to a table containing a serial column, the next highest integer value is assigned to that column when the row is committed. can I define a serial datatype which will autoincrement when updating a row with a previously assigned serial value?...in datablade?.. I'm currently using the following functionality for an i...

ConstraintException on DataTable.Rows.Add with AutoIncrement Column

Hi, I've got some DataTables with an ID column with AutoIncrement enabled both on the MySQL server side and the ADO.NET schema side (loaded from an XML schema file). I'd like not to have to care about these IDs when inserting rows because their sole use is to have a primary key for the table – there are no foreign key references. Howe...

Is there a way to create autoincrement key via Oracle Create Table Gui?

I create tables with using TOAD Create Table GUI. I want to create autoincrement key. I don't want to write sql of it. Is there any way to do this on GUI screen? ...

How to add a series of string in incrementing id in any table?

I have MySQL Table with an Order table in a DB this table has an auto-incremental id. Up-till now we have general numeric Order-ID likewise 1,2,3,4,5... From now onwards I have to append the series A20 to my id like A20103, A20104, A20105 and so on and when the last three digits reaches 999 the series appended should get changed to A2100...

sqlite: multi-column primary key with an auto increment column

I basically want to convert a table from mysql to sqlite with the following scheme: create table items ( id integer auto_increment, version integer default 0, primary key (id, version) ); Essentially, I want ID to auto increment whenever I insert anything into the table, with VERSION starting off at 0, but still allow multiple items w...

Create autoincrement key in Java DB using NetBeans IDE

Hi. I'm coming from MySQL world, please help. Is it possible to create autoincrement key from NetBeans IDE in JavaDB? Do you use some more advanced db clients, which? Thanks. ...

Reset the row number count in SQLite3/MySQL

I am using SQLite3. I load a table with say 30 rows using integer as Primary ID and it auto-increments. Now I delete all the rows from the table and then, reload some new information onto the table. Problem is: the row count (my PrimaryID) now starts with 31. Is there any way that I can start loading new rows from the number 1 onwards?...

How do I assign an incremental z-index # for each H2 using Jquery.

Using Jquery, How do I assign an incremental z-index # for each H2, incrementing by 2's? (when document is ready, start with the first H2 and give it a z-index of 2, then go to the next H2 and give it a z-index of 4.... etc. z-index of the next H2 is 6 etc. example: <H2 style="z-index: 2;">heading one</h2> <H2 style="z-index: 4;">headi...

What are the strategies for dealing with Numeric Sequence Primary keys once you hit the data type limit...

Consider the following sample table in MySQL: CREATE TABLE transactions ( transId BIGINT NOT NULL AUTO_INCREMENT, transDate DATETIME NOT NULL, transTotal DECIMAL(10,2), PRIMARY KEY (transId) ); This table is used in high volume operations i.e. lots of INSERTS. You will eventually reach the maximum limit of transId. ...

Autoincrementing letters in Perl

Hey guys, I do not understand autoincrementing letters in Perl. This example seems perfectly understandable: $a = 'bz'; ++$a; ca #output b gets incremented to c. There is nothing left for z to go to, so it goes back to a (or at least this is how I see the process). But then I come across statements like this: $a = 'Zz'; ++$a; AAa #...