db2

django 多数据库迁移

由 不问归期 提交于 2020-01-11 00:20:05
一，迁移命令 db1：django的一个数据库 db2：django的另一个数据库 appname1：使用db1的app appname2：使用db2的app python manage.py migrate appname2 --database = db2 二，迁移过程中的问题 "Error creating new content types. Please make sure contenttypes " RuntimeError: Error creating new content types. Please make sure contenttypes is migrated before trying to migrate apps individually. 这是因为db2中没有django数据库基本信息表，需要把contentype表也迁移到db2中，同时contentype有依赖于auth表，所以需要先迁移auth表,否则汇报如下错误： django.db.utils.ProgrammingError: ( 1146, "Table 'xxxx.auth_permission' doesn't exist" ) 正确的流程如下： python manage.py migrate auth --database = db2 python manage.py

Cannot use group by and over(partition by) in the same query?

由 血红的双手。 提交于 2020-01-10 10:05:23
问题 I have a table myTable with 3 columns. col_1 is an INTEGER and the other 2 columns are DOUBLE . For example, col_1={1, 2}, col_2={0.1, 0.2, 0.3} . Each element in col_1 is composed of all the values of col_2 and col_2 has repeated values for each element in col_1 . The 3rd column can have any value as shown below: col_1 | col_2 | Value ---------------------- 1 | 0.1 | 1.0 1 | 0.2 | 2.0 1 | 0.2 | 3.0 1 | 0.3 | 4.0 1 | 0.3 | 5.0 2 | 0.1 | 6.0 2 | 0.1 | 7.0 2 | 0.1 | 8.0 2 | 0.2 | 9.0 2 | 0.3 |

DB2 Using LIMIT and OFFSET

由 别来无恙 提交于 2020-01-09 11:10:11
问题 I am developing a Java Web service allow paging when fetching big data set from a DB2 Database on a IBM Mid Range Machine (AS400). For example; if there are 10000 records in a data set, I want to fetch them in 1000 blocks at a time. I found this article that explains that I can use LIMIT, and OFFSET. But I need to set the DB2_COMPATIBILITY_VECTOR variable to MYS . Now I have been googling and saw you can use the db2set to set this variable. But I have not been able to find out where to type

SQLSTATE 24000 - Invalid Cursor State

由 丶灬走出姿态 提交于 2020-01-09 08:12:10
问题 I connect to a DB2 database and makes the following query. I don't understand why I get the error: "invalid cursor state". public static void blivPar() { try { Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE); stmt.setMaxRows(1000); ResultSet drenge = stmt.executeQuery("SELECT * FROM People WHERE sex='M'"); ResultSet piger = stmt.executeQuery("SELECT * FROM People WHERE sex='F'"); drenge.first(); piger.first(); int i=0; while(drenge.next()) {

SQLSTATE 24000 - Invalid Cursor State

由 孤街醉人 提交于 2020-01-09 08:12:01
问题 I connect to a DB2 database and makes the following query. I don't understand why I get the error: "invalid cursor state". public static void blivPar() { try { Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE); stmt.setMaxRows(1000); ResultSet drenge = stmt.executeQuery("SELECT * FROM People WHERE sex='M'"); ResultSet piger = stmt.executeQuery("SELECT * FROM People WHERE sex='F'"); drenge.first(); piger.first(); int i=0; while(drenge.next()) {

webcat 1.1.0 发布

由 a 夏天 提交于 2020-01-08 14:35:15
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 数据库管理软件 webcat 1.1.0 已发布，增加SQL审核，SQL发布，SQL查询编辑器功能，多数据库支持，mysql, oracle, sqlserver, db2, postgresql, derby。 http://www.finderweb.net/webcat.html 来源： oschina 链接： https://my.oschina.net/u/223584/blog/3154818

Entity Framework中的SqlException-不允许新事务，因为会话中正在运行其他线程

由 烂漫一生 提交于 2020-01-07 17:58:46
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 我目前收到此错误： System.Data.SqlClient.SqlException：不允许新事务，因为会话中正在运行其他线程。 在运行此代码时： public class ProductManager : IProductManager { #region Declare Models private RivWorks.Model.Negotiation.RIV_Entities _dbRiv = RivWorks.Model.Stores.RivEntities(AppSettings.RivWorkEntities_connString); private RivWorks.Model.NegotiationAutos.RivFeedsEntities _dbFeed = RivWorks.Model.Stores.FeedEntities(AppSettings.FeedAutosEntities_connString); #endregion public IProduct GetProductById(Guid productId) { // Do a quick sync of the feeds... SyncFeeds(); ... // get a product... ...

Access on prem DB2 from DSX

由 纵然是瞬间 提交于 2020-01-07 09:36:50
问题 I am trying to access on prem DB2 data from DSX using a Python notebook in Jupyter. I have uploaded db2jcc.jar & license jar files to my home directory but how do I add the directory to the classpath ? Is there another to 回答1: You can alternatively use connector available on DSX to connect to DB2 on prem. from ingest import Connectors from pyspark.sql import SQLContext sqlContext = SQLContext(sc) DB2loadOptions = { Connectors.DB2.HOST : '***********', Connectors.DB2.PORT : '***********',

Access on prem DB2 from DSX

由 故事扮演 提交于 2020-01-07 09:35:09
问题 I am trying to access on prem DB2 data from DSX using a Python notebook in Jupyter. I have uploaded db2jcc.jar & license jar files to my home directory but how do I add the directory to the classpath ? Is there another to 回答1: You can alternatively use connector available on DSX to connect to DB2 on prem. from ingest import Connectors from pyspark.sql import SQLContext sqlContext = SQLContext(sc) DB2loadOptions = { Connectors.DB2.HOST : '***********', Connectors.DB2.PORT : '***********',

关于db2获取月份的第一天或者最后一天的方式方法

由 。_饼干妹妹 提交于 2020-01-07 07:21:29
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 今天遇到一个需要根据日期参数获取月份的第一天 最后一天 的情况，发现db2自身函数还是很强大的 method： SELECT LAST_DAY(current date+1 month) FROM sysibm.sysdummy1; method： values(LAST_DAY(current date + 1 month)) ; values(LAST_DAY(sysdate - 1 months)); -- 上月最后一天 values(LAST_DAY(sysdate - 2 months) + 1 day); -- 上月第一天 values(LAST_DAY(sysdate)); -- 当月最后一天 values(LAST_DAY(sysdate - 1 months) + 1 day); -- 当月第一天 DB2 月份的最后一天 方法一 SELECT LAST_DAY(current date+1 month) FROM sysibm.sysdummy1; 方法二 values(LAST_DAY(current date + 1 month)) ; 其它 values(LAST_DAY(current date - 1 months)); -- 上月最后一天 values(LAST_DAY
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