db2

一 Django的数据库配置 （一）修改settings.py文件关于数据库的配置： Django默认使用sqlite: DATABASES = { ' default ' : { ' ENGINE ' : ' django.db.backends.sqlite3 ' , # sqlite引擎 ' NAME ' : os.path.join(BASE_DIR, ' db.sqlite3 ' ), } } 再添加一个数据库: DATABASES = { ' default ' : { ' ENGINE ' : ' django.db.backends.sqlite3 ' , ' NAME ' : os.path.join(BASE_DIR, ' db.sqlite3 ' ), }, ' db2 ' : { ' ENGINE ' : ' django.db.backends.sqlite3 ' , ' NAME ' : os.path.join(BASE_DIR, ' db2.sqlite3 ' ), }, } 如果想要使用mysql,则进行如 DATABASES = { ' default ' : { ' ENGINE ' : ' django.db.backends.mysql ' , # mysql引擎 ' NAME ' : '' , # 数据库名称, ' USER ' : '

We want to put the current datetime into a database column. We have a web farm where the time on the web servers can vary, we therefore need to use the datetime on the database server. We have a database with a Not Null datetime column. This column has a default datetime of current time. This works fine when we insert data using a SQL statement that does not include the datetime column. From Entity Framework: If we define the datetime as not null , the datetime is set to low date, and low date is inserted into the database. If we define the datetime as null , we get an exception on the insert

We are developing software that generates and executes SQL queries for Oracle and SQL Server using ODBC drivers . We are researching the possibility to expand to DB2 , but I read that there are several versions available. DB2 for LUW , for iSeries and for z/OS. Are there any differences in SQL of SQL/PLSQL functionality in these versions? As a ISV, is it possible to get a development environment for DB2 for iSeries or z/OS As many other answers already say, there are differences between the members of the DB2 family. All DB2 are SQL-99 complaint, and each member has specific features of the

I have a lot of SQL queries like this: SELECT o.Id, o.attrib1, o.attrib2 FROM table1 o WHERE o.Id IN ( SELECT DISTINCT Id FROM table1 , table2 , table3 WHERE ... ) These queries have to run on different database engines (MySql, Oracle, DB2, MS-Sql, Hypersonic), so I can only use common SQL syntax. Here I read, that with MySql the IN statement isn't optimized and it's really slow, so I want to switch this into a JOIN . I tried: SELECT o.Id, o.attrib1, o.attrib2 FROM table1 o, table2, table3 WHERE ... But this does not take into account the DISTINCT keyword. Question: How do I get rid of the

I need to execute the command . /home/db2v95/sqllib/db2profile before I can import ibm_db_dbi in Python 2.6. Executing it before I enter Python works: baldurb@gigur:~$ . /home/db2v95/sqllib/db2profile baldurb@gigur:~$ python Python 2.6.4 (r264:75706, Dec 7 2009, 18:45:15) [GCC 4.4.1] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import ibm_db_dbi >>> but executing it in Python using os.system(". /home/db2v95/sqllib/db2profile") or subprocess.Popen([". /home/db2v95/sqllib/db2profile"]) results in an error. What am I doing wrong? Edit: this is the error I

I trying to configure an XA DB2 DataSource, xa-datasource (based on http://community.jboss.org/wiki/SetUpADB2Datasource ) using com.ibm.db2.jcc.DB2XADataSource class ( local-tx-datasource works using the com.ibm.db2.jcc.DB2Driver ). The target server is DB2 Connect V9.7 Actual xa-datasource config: <xa-datasource> <jndi-name>jdbc/DB2ServerDS</jndi-name> <use-java-context>false</use-java-context> <track-connection-by-tx>true</track-connection-by-tx> <xa-datasource-class>com.ibm.db2.jcc.DB2XADataSource</xa-datasource-class> <xa-datasource-property name="URL">jdbc:db2://db2server:50000/FINDB</xa

I am trying to use the data analysis tool Pandas in Python Language. I am trying to read data from a IBM DB, using ibm_db package. According to the documentation in Pandas website we need to provide at least 2 arguments, one would be the sql that would be executed and other would be the connection object of the database. But when i do that, it gives me error that the connection object does not have a cursor() method in it. I figured maybe this is not how this particular DB Package worked. I tried to find a few workarounds but was not successfull. Code: print "hello PyDev" con = db.connect(

APDPlat 共支持10种数据库：DB2、DERBY、H2、HSQL、INFORMIX、MYSQL、ORACLE、POSTGRESQL、SQL_SERVER、SYBASE。 数据库的默认配置信息在文件APDPlat_Core/src/main/resources/org/apdplat/db.properties中定义，用户可以根据自己的选择，在APDPlat_Web/src/main/resources/db.local.properties配置文件中覆盖默认配置。 1、如何指定使用哪一种数据库呢？ jpa.database=MYSQL jpa.database 配置项的值可为上述10种数据库之一，10种数据库的JDBC驱动已经集成到APDPlat中，其中5种定义到maven配置文件APDPlat_Web/pom.xml的依赖中，其余5种放置在APDPlat_Web/src/main/webapp/WEB-INF/lib目录中。 2、如何配置数据库连接信息呢？ #mysql db.driver=com.mysql.jdbc.Driver db.url=jdbc:mysql://localhost:3306/${module.short.name}?useUnicode=true&characterEncoding=UTF-8&createDatabaseIfNotExist