db2

how to optimise the given db2 query,

由 余生长醉 提交于 2019-12-31 07:49:41
问题 Consider my DB2 query as below. Select something from some tables, (select something from some tables where bhla=bhla Unionall select something from some tables where bhla=bhla union select something from some tables where bhla=bhla) x where bhla=bhla and it looks like select x.something, y.somethingelse from table y, (select something from some tables where bhla=bhla Unionall select something from some tables where bhla=bhla union select something from some tables where bhla=bhla) x where

Hibernate的dialect 方言大全

由 时间秒杀一切 提交于 2019-12-31 07:43:18
hibernate.dialect：方言 RDBMS 方言 DB2 org.hibernate.dialect.DB2Dialect DB2 AS/400 org.hibernate.dialect.DB2400Dialect DB2 OS390 org.hibernate.dialect.DB2390Dialect PostgreSQL org.hibernate.dialect.PostgreSQLDialect MySQL org.hibernate.dialect.MySQLDialect MySQL with InnoDB org.hibernate.dialect.MySQLInnoDBDialect MySQL with MyISAM org.hibernate.dialect.MySQLMyISAMDialect Oracle (any version) org.hibernate.dialect.OracleDialect Oracle 9i/10g org.hibernate.dialect.Oracle9Dialect Sybase org.hibernate.dialect.SybaseDialect Sybase Anywhere org.hibernate.dialect.SybaseAnywhereDialect Microsoft SQL

DATE lookup table (1990/01/01:2041/12/31)

由 隐身守侯 提交于 2019-12-31 03:49:34
问题 I use a DATE's master table for looking up dates and other values in order to control several events, intervals and calculations within my app. It has rows for every single day begining from 01/01/1990 to 12/31/2041. One example of how I use this lookup table is: A customer pawned an item on: JAN-31-2010 Customer returns on MAY-03-2010 to make an interest pymt to avoid forfeiting the item. If he pays 1 months interest, the employee enters a "1" and the app looks-up the pawn date (JAN-31-2010)

DB2 Distinct + xmlagg Query

由 只愿长相守 提交于 2019-12-30 10:57:25
问题 I want equivalent to GROUP_CONCAT functionality of MySql in DB2. I have tried XML Aggrigate functon of DB2 for cocating murows. SELECT a.ID, substr(xmlserialize(xmlagg(xmltext( concat(',', SPECIALISATION)))as varchar( 1024 )),2), substr(xmlserialize(xmlagg(xmltext(concat(',,, BASIC_SKILL2)))as varchar( 1024 )),2), substr(xmlserialize(xmlagg(xmltext(concat(',', BASIC_SKILL1)))as varchar( 1024 )),2) FROM candidate_resume_data a,candidate_skills_info b,skill_special_master c,skill_master_basic2

How to query range of data in DB2 with highest performance?

由 。_饼干妹妹 提交于 2019-12-30 06:49:22
问题 Usually, I need to retrieve data from a table in some range; for example, a separate page for each search result. In MySQL I use LIMIT keyword but in DB2 I don't know. Now I use this query for retrieve range of data. SELECT * FROM( SELECT SMALLINT(RANK() OVER(ORDER BY NAME DESC)) AS RUNNING_NO , DATA_KEY_VALUE , SHOW_PRIORITY FROM EMPLOYEE WHERE NAME LIKE 'DEL%' ORDER BY NAME DESC FETCH FIRST 20 ROWS ONLY ) AS TMP ORDER BY TMP.RUNNING_NO ASC FETCH FIRST 10 ROWS ONLY but I know it's bad style.

db2用户权限

由 好久不见. 提交于 2019-12-30 05:19:03
前言： DB2数据库权限分为实例级权限（SYSADM、SYSCTRL、SYSMAINT、SYSMON）和DB2数据库级权限（DBAMD、LOAD）。DB2中用户所拥有的权限主要考虑三个方面：实例级、数据库级、数据库操作级别，查看命令是db2 get authorizations。 DB2授权可分为实例级权限授权和数据库级别授权，实例级别权限必须由拥有SYSADM权限的用户通过update cfg来授予用户组，数据库对象级别权限由DBAMD权限用户通过grant命令显示的授予用户或用户组。 一、DB2权限简介 DB2数据库权限分为实例权限级别（SYSADM、SYSCTRL、SYSMAINT、SYSMON）和DB2数据库权限级别（DBAMD、LOAD）。SYSCTRL、SYSMAINT、SYSMON权限级别的用户不能访问数据，DBAMD、LOAD权限级别的用户可以访问数据。 实例级别权限(只能在用户组级别上进行分配)： SYSADM ----系统管理权限(UNIX系统中，SYSADM用户组默认地设置为实例拥有者所在的主用户组，因此，该组中的任何用户都拥有SYSADM权限） SYSCTL---- 系统控制权限 SYSMAINT---- 系统维护权限 数据库级别： dbadm---- 数据库管理权限（不能执行诸如删除数据库、创建和删除表空间、备份或者恢复数据库等等维护性和管理任务）

DB2: Purge large number of records from table

由 亡梦爱人 提交于 2019-12-30 05:07:07
问题 I am using DB2 9.7 FP5 for LUW. I have a table with 2.5 million rows and I want to delete about 1 million rows and this delete operation is distributed across table. I am deleting data with 5 delete statements. delete from tablename where tableky between range1 and range2 delete from tablename where tableky between range3 and range4 delete from tablename where tableky between range5 and range5 delete from tablename where tableky between range7 and range8 delete from tablename where tableky

What is the Spring Data JPA method to use findBy for multiple fields and also use Containing clause for all the fields

由 回眸只為那壹抹淺笑 提交于 2019-12-30 03:26:10
问题 I have a class called Profile and its JPA repository ProfileRepo I'm trying to use findBy method to find names using first name or middle name or last name and also using containing clause. public class Profile{ private String firstName; private String middleName; private String lastName; //getters and setters } Am using the following query in the JPA repository but it is not accepting the method List<Profile> findByLastNameContainingOrFirstNameContainingOrMiddleNameContainingAllIgnoreCase

How to prevent SQL injection when the statement has a dynamic table name?

由 久未见 提交于 2019-12-30 02:20:08
问题 I am having code something like this. final PreparedStatement stmt = connection .prepareStatement("delete from " + fullTableName + " where name= ?"); stmt.setString(1, addressName); Calculation of fullTableName is something like: public String getFullTableName(final String table) { if (this.schemaDB != null) { return this.schemaDB + "." + table; } return table; } Here schemaDB is the name of the environment(which can be changed over time) and table is the table name(which will be fixed).

Passing comma separated value as an IN parameter in stored procedure

由 不打扰是莪最后的温柔 提交于 2019-12-29 02:07:11
问题 I am new to DB2 queries. Here, I am passing a comma separated value as an IN parameter in a Stored Procedure. I want to search on the basis of those values. Select * from USER where user_id in (IN_User); Here, IN_User will have values of the kind ('val1','val2','val3') It should return all the rows which has val1 or val2 or val3 as the User_id. As much as I know this can be done using UDF but I want to know is there any other way to do it without UDF. 回答1: please create a function to split
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