db2

How do I write a query that outputs the row number as a column? This is DB2 SQL on an iSeries. eg if I have table Beatles: John Paul George Ringo and I want to write a statement, without writing a procedure or view if possible, that gives me 1 John 2 Paul 3 George 4 Ringo SELECT ROW_NUMBER() OVER (ORDER BY beatle_name ASC) AS ROWID, * FROM beatles Check out the row_number() function; you should be able to do this in DB2 via: SELECT row_number(), first_name FROM beatles I'm almost certain this is not part of the SQL standard though, so it is not likely to be portable should that ever be an

　　MQT ：物化查询表。是以一次查询的结果为基础 定义创建的表（实表），以量取胜（特别是在百万，千万级别的量，效果更显著），可以更快的查询到我们需要的结果。MQT有两种类型，一种是系统维护的MQT ，一种是用户维护的MQT。本处是基于系统维护的MQT展开解析。 　　对于系统维护的MQT，这么和基表操作的数据更新。通过两种刷新机制：一种是即时刷新 refresh immediate ,另一种是延迟更新 refresh deferred 。 　　所谓的即时更新，就是当基表进行CRUD(增删改查)的操作时，对应的MQT表数据也会进行相应的刷新，这样的优点是能够保证MQT中的数据中是最新的，但是由于对基表进行操作的同时还要维护MQT表，负载有所增加。 　　使用延迟更新，当对基表进行操作的时候，MQT中的数据没有进行刷新，而是等到用户（DBA）阶段性的执行刷新命令（refresh table MQT_table）时才会进行刷新。这种方式适合用在绝大部分时间都是只读的应用系统中，或者数据的更新只发生维护窗口时间。 　　MQT刷新的方式还可以从数据的刷新范围进行分类，一是完全刷新，二是增量刷新。完全刷新是将基表中的所有数据重新进行计算和处理从而更新MQT数据。这种方式的缺点是当基表数据量大而且MQT定义复杂的时候，刷新过程会比较慢。增量更新方式是针对CRUD等操作更新过的数据的那一部分数据

I want to get the value of the last ID insert in a table. How I can do this? Enrique San Martín Well the solution that I use is: select id from NEW TABLE (insert into (val1, val2, ...) values ('lorem', 'ipsum', ...)) This gets the id column from the last row inserted in the DB :) SELECT IDENTITY_VAL_LOCAL() AS VAL FROM SYSIBM.SYSDUMMY1 See docs . Have a look at this answer. http://www.sitepoint.com/php-database-db2/ // get the last inserted ID into the specified table // int lastInsertID(string $tblName) function lastInsertID($tblName) { if ($this->transIsOpen()) { $sql = "SELECT SYSIBM

Previously we used DB2 as database, but now we are migrating to Oracle. Now, in our project we have extensively used sql's that were Db2 specific. Is there any way to convert those DB2 specific queries to oracle supported queries. Thanks You have a lot of work ahead! Between DB2 and Oracle, some important differences are (just an arbitrary enumeration of what I can think of): Data types Number data types: DB2 has many more standard types, such as SMALLINT , INTEGER , DOUBLE , etc. Those don't exist in Oracle SQL (although some exist in PL/SQL). This is important for DDL and for casting and

I can't browse data on SAMPLE DB. Setup is as follows: - Windows 7 64 bit PRO, - IBM DB2 Express-C, 10.5.500.107 (latest) - IBM Data Studio Version 4.1.1 (Administrative installation, Installed using IBM Installation Manager 1.8.1) Database credentials are: db2admin/db2admin Windows administrator username is: Nenad (password protected) With DB2 command line processor (Start -> IBM DB2 DB2COPY1 (Default) -> DB2 Command Line Processor) I can connect to SAMPLE database using: db2 => connect to sample Database Connection Information Database server = DB2/NT64 10.5.5 SQL authorization ID = NENAD

Is there any way in IBM DB2 to get the list of tables which have been changed(updated/added/deleted) since a specific timestamp? The problem i am facing is i have restored one backup on 25 July in one box from live db server and updated this restored DB while enabling features packs. Now the live DB server has changed since customer is accessing it and i cannot restore the latest backup as box1 have some addition tables/data. So i wanted to know the list of tables which have been changed since last backup so that i can update those tables manually. Please help. If you're on DB2 for Linux/Unix