db2

I have created a Database in DB2 and tables with relationships. I would like to create a ER diagram based on my database design in DB2. MS SQL has a facility to create ER diagrams from DB schema, but DB2 doesn't seem to have one, at least to my knowledge. Any one know of any open source tools/facility within DB2 itself for this? You could try TOAD for DB2 (freeware and commercial versions). Download here Also IBM Data Studio looks promising. DbVisualizer can visualize (and much more) just about any database, provided that the relevant foreign keys have been defined. DbVisualizer isn't open

I just want to format current date into yyyymmdd in DB2. I see the date formats available, but how can I use them? http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=%2Fcom.ibm.db2z10.doc.intro%2Fsrc%2Ftpc%2Fdb2z_datetimetimestamp.htm SELECT CURDATE() FROM SYSIBM.SYSDUMMY1; I dont see any straightforward way to use the above listed formats. Any suggestion? SELECT VARCHAR_FORMAT(CURRENT TIMESTAMP, 'YYYYMMDD') FROM SYSIBM.SYSDUMMY1 Should work on both Mainframe and Linux/Unix/Windows DB2. Info Center entry for VARCHAR_FORMAT() . One more solution REPLACE (CHAR(current date,

I want to drop a column called id which is an auto incrementing PK. The SQL: alter table "CO88GT"."XGLCTL" drop column id cascade; And I get: Error: [SQL0952] Processing of the SQL statement ended. Reason code 10. SQLState: 57014 ErrorCode: -952 I could be wrong but I think it has something to do with preventing the table from losing data. To get around this issue I need to create a new table without the column and copy the data from the old table into the new table and then replace the old table with the new table. davorp Info AS400 is giving you a warning (inquiry message) because of

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm coming from a MSSQL background, and when I ask people at my company if they've created Indexes on certain columns they'll say yes but point me to these things call Logical Files. In the iSeries Navigator these Logical Files show up under the 'Views' category. When I click the 'Indexes' category nothing is there, leading me to believe that there are actually no Indexes created on any columns, at least as I understand them. A Logical File appears to be a View sorted by certain columns. So my question is, are Logical Files and

本文针对在规划设计分布式系统时会面临到的分布式事务问题采取的解决方案进行总体阐述 随着行业IT应用的业务复杂度提升、数据级日渐庞大、应用面越来越广、并发压力也越来越高。为了应对这样的情况，分布式系统的解决方案随之而出，成为目前主流架构模式。当然，是否采用分布式方案取决于实际业务系统要求。 分布式系统涉及到的技术层面非常广，本文只针对在规划设计分布式系统时会面临到的分布式事务问题采取的解决方案进行总体阐述。 分布式系统架构 随着行业业务及互联网不断的高速发展，业务的复杂度也越发更高，数据增长快、并发性能要求高，造成近年来大部分业务系统逐步转化成采用分布式架构。 对业务进行合理的、有前瞻性的服务化拆分规划是目前所有大型系统采取的一个原则，而大型的系统技术架构也要基于该原则，面向服务化的系统架构设计要服务于业务规划设计方案。 分布式系统架构大概的模式 目前大部分大型WEB系统发展趋向都采用类似互联网基于业务服务化进行架构设计模式，对业务进行深入拆分规划、服务化等，微服务、SOA 等服务架构模式正在被大规模的使用。业务系统的服务部署也逐步采用各种主流的技术方案，例如虚拟化、Docker、云托管等。 分布式系统架构的采用、业务服务化和微服务的采用对于大型WEB系统可降低系统开发整体难度、提升系统开发迭代周期和效率等，也可以引入不同的技术栈协同开发，不同开发团队同时协作开发。

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to drop a column called id which is an auto incrementing PK. The SQL: alter table "CO88GT"."XGLCTL" drop column id cascade; And I get: Error: [SQL0952] Processing of the SQL statement ended. Reason code 10. SQLState: 57014 ErrorCode: -952 I could be wrong but I think it has something to do with preventing the table from losing data. To get around this issue I need to create a new table without the column and copy the data from the old table into the new table and then replace the old table with the new table. 回答1: Info AS400 is giving

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Hello everybody I am learning DB2 and would like to know how to see a table's characteristics after I create one. Similar to the EXPLAIN TABLE command in MySQL. Thank you. 回答1: In addition to DESCRIBE TABLE, you can use the below DESCRIBE INDEXES FOR TABLE *tablename* SHOW DETAIL to get information about the table's indexes. The most comprehensive detail about a table on DB2 for Linux, UNIX, and Windows can be obtained from the db2look utility, which you can run from a remote client or directly on the DB2 server as a local user. The tool