db2 | 易学教程

How to create a new schema on a database at IBM Data Studio?

阅读更多关于 How to create a new schema on a database at IBM Data Studio?

问题 I am trying to create a new schema on a database that I created at IBM Data Studio but I get error: "DB2ADMIN" does not have the privilege to perform operation "CREATE SCHEMA".. SQLCODE=-552, SQLSTATE=42502, DRIVER=3.67.28. How can I do it on command line? Thanks! 回答1: It is just because the user that you are using to connect to the database does not have the DBADM authority. Possible duplicate of this question: create db2 schema using jdbc Please check the documentation: create db2 schema

跨越数据库发展鸿沟，谈分布式数据库技术趋势

阅读更多关于跨越数据库发展鸿沟，谈分布式数据库技术趋势

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 金融行业架构转型需求随着移动化与互联网化的不断发展，我国金融行业的商业模式与技术体系已经逐渐走上了与西方世界完全不同的道路。众所周知，欧美国家的移动化普及率远远不如我国，同时人口基数也有着数量级的不同，这就使得国内外金融行业所面临的业务类型、数据量、并发量都存在巨大的差异，导致对整个IT基础设施的需求截然不同。在最近的一两年中，国内部分科技领先的银行已经率先对微服务与分布式技术进行了探索，一些新建的互联网金融类业务也已经开始尝试使用微服务架构、分布式技术、DevOps框架进行应用的开发与维护。甚至一些银行在规划下一代核心体系架构时，也会尝试适当引入分布式架构，以满足未来业务压力与数据量不断增长的需求。与新一代分布式架构相比，中间件加数据库的传统“烟囱式”架构在面向海量数据、高并发、高响应速度的业务应用时存在诸多问题。从业务部门和系统来看，复杂的业务导致企业中系统数量多、分散、数据之间完全隔离无法共享；系统缺乏灵活的水平伸缩能力，性能瓶颈明显，很容易遇到硬件瓶颈，无法满足弹性扩张的业务需求系统无法快速响应顺势爆发的海量请求，例如双十一期间、秒杀等业务导致的瞬时爆发性增长很难处理；采购和运维成本高昂，小型机设备与软硬件分别采购独立运维，导致整体拥有成本高昂；缺乏自主掌控能力，高度依赖国外的厂商

Generating an EDMX from a DB2 Database

阅读更多关于 Generating an EDMX from a DB2 Database

问题 I'm trying to create an EDMX file using VS2013 so I can read/write from a DB2 Database. I go through the same process as creating the EDMX from my SQL tables (Right click on project -> Add New Item -> ADO.NET Entity Data Model -> EF Designer from database -> Not using SQL this time so: new connection -> Change data source) but in the Data Source option, DB2 is not available. I have 2 SQL options and that's it. Data Source So after doing some investigating around here along with some other

FULL OUTER JOIN or UNION?

阅读更多关于 FULL OUTER JOIN or UNION?

问题 confused how to achieve this maybe with FULL OUTER or a UNION. I want to join results in such a way that Table1 Table2 --------------- ----------------- ID Name Salary ID Fruits --------------- ----------------- 1 John 1000 1 Apples 1 Henry 4000 1 Mangoes 1 Smith 1000 1 Tomatoes Result should be ResultTable ------------------------ ID Name Salary Fruits ----------------------- 1 John 1000 Apples 1 John 1000 Mangoes 1 John 1000 Tomatoes 1 Henry 4000 Apples 1 Henry 4000 Mangoes 1 Henry 4000

Side-by-side comparison of data by year in SQL

阅读更多关于 Side-by-side comparison of data by year in SQL

问题 I have table similar to the following: Year | Product | Value 2006 A 10 2006 B 20 2006 C 30 2007 A 40 2007 B 50 2007 C 60 I would like a query that would return the following comparison Product | 2006 Value | 2007 Value A 10 40 B 20 50 C 30 60 What are the options to do so? Can it be done without joins? I'm working with DB2, but answers in all SQL types would be helpful. 回答1: select Product, max(case when Year = 2006 then Value end) as [2006 Value], max(case when Year = 2007 then Value end)

how to convert number into words using db2 sql query

阅读更多关于 how to convert number into words using db2 sql query

问题 is there any way to convert a date into Julian numbers and spell the number as is done in Oracle to_date function. Please help how to do that in DB2 FOR EXAMPLE ::-- select to_char(to_date(009341,'J'), 'JSP') "WORDS" from DUAL; 回答1: Not that I am aware of. You might need to roll your own. E.g. this will count to 100. I'll leave it as an exercise for the reader to create a second UDF that can then count up to the billions.. CREATE OR REPLACE FUNCTION HUNDRED(i int) RETURNS VARCHAR(40) RETURN

Remove trailing zeros after decimal point in DB2

阅读更多关于 Remove trailing zeros after decimal point in DB2

问题 I have the following values in label table in DB2 (version : 9.5.8) select field4 from label with ur 1.5000 0.006 9.0001 104.2500 17.0000 3.5000 Is it possible to eliminate the trailing zeros after the decimal point with an update query in DB2? If all the digits are zeros after the decimal point, I need to keep that as .0 , however. Expected output: 1.5 0.006 9.0001 104.25 17.0 3.5 回答1: You should probably consider changing the column to some kind of numeric. Anyhow, heres an idea: with t(s)

How to replicate VSAM files (Mainframe) to Database?

阅读更多关于 How to replicate VSAM files (Mainframe) to Database?

问题 What is an efficient solution/technology (other than ETL) to do a near real-time replication of data from a VSAM file (Mainframe) to an RDBMS (outside Mainframe) ? Note : This VSAM file has COM3 data, so the replication technology should be able to understand and transform this during the replication. 回答1: there is a product at IBM - VSAM transparancy that routes vsam calls to DB2; this can help in a migration process.. there is also federation server of IBM that gives transparancy to

How to call Stored Procedure and prepared statement

阅读更多关于 How to call Stored Procedure and prepared statement

问题 In the below code I want to call one stored procedures and execute one Query. I am facing error at statement.executeUpdate(); Please help in fixing it. I am not sure where it going wrong. public void Dbexe() { Connection connection; connection = DatabaseConnection.getCon(); CallableStatement stmt; try { stmt = connection.prepareCall("{CALL optg.Ld_SOpp}"); stmt.executeUpdate(); stmt.close(); } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } System.out

How to combine three queries?

阅读更多关于 How to combine three queries?

问题 I have three queries and i have to combine them together. Query 1 WITH ph AS (SELECT chrd, chwo, chse, chst, chvr, chfv, chrd, ROW_NUMBER () OVER(PARTITION BY chwo ORDER BY chse, chvr desc) TEMP FROM wrpd.wscl WHERE chaj > '20180901' AND chst = 'R' AND chstb IN ( 'L1', 'R2' ) ORDER BY chse) SELECT * FROM ph A WHERE A.temp = 1 Query 2 SELECT chrd, chwo, chse, chst, chvr, chfv, chrd, ROW_NUMBER () OVER( PARTITION BY chwo ORDER BY chse, chvr desc) TEMP FROM wrpd.wscl WHERE chajdt > '20180901'