I am new in interface and write now I am gone through some assignment. I have one question that is :
我非常熟悉将.dat文件(和.ctl)的数据装入集结台的方法,使用平板(使用 sqlldr),但我需要通过某些 pl/sql 程序完成同样的任务(即将数据从.datflie装入集结台).请提出逻辑。...
I am new in interface and write now I am gone through some assignment. I have one question that is :
我非常熟悉将.dat文件(和.ctl)的数据装入集结台的方法,使用平板(使用 sqlldr),但我需要通过某些 pl/sql 程序完成同样的任务(即将数据从.datflie装入集结台).请提出逻辑。...
通常,您会使用 < a href=" http://docs.oracle.com/cd/B19306_01/server. 102/b14215/et_concepts.htm" rel=“nofollow” >外部表格 。 语法会与 SQL* Looader 控制文件非常相似, 但它是数据库中定义的一个对象, 可以让您将文件显示为关联表格。 然后您只需查询外部表格就可以完成您的负荷 。
不过,这确实需要数据库服务器 s 文件系统上存在数据文件。
I m trying to export some tables from SQL Server 2005 and then create those tables and populate them in Oracle. I have about 10 tables, varying from 4 columns up to 25. I m not using any constraints/...
I ve got the following objects: CREATE FUNCTION CONSTFUNC RETURN INT DETERMINISTIC AS BEGIN RETURN 1; END; CREATE TABLE "FUNCTABLE" ( "ID" NUMBER(*,0) NOT NULL, "VIRT" NUMBER GENERATED ALWAYS AS ...
The following code works. the connection opens fine but recordset.recordCount always returns -1 when there is data in the table. ANd If I try to call any methods/properties on recordset it crashes ...
I was wondering, is there a way to make a kind of one to one left outer join: I need a join that matches say table A with table B, for each record on table A it must search for its pair on table B, ...
I need to be able to run an Oracle query which goes to insert a number of rows, but it also checks to see if a primary key exists and if it does, then it skips that insert. Something like: INSERT ALL ...
I just came across NULL values in NOT-NULL fields in our test database. How could they get there? I know that NOT-NULL constraints can be altered with NOVALIDATE clause, but that would change table s ...
I m studying databases and am currently working on a object-relational DB project and I ve encountered a small problem with the number of possible constraints in an object table. I m using "Database ...
we have a table in an Oracle Database which contains a column with the type Char(3 Byte). Now we use a parameterized sql to select some rows with a DBNull.Value and it doesn t work: OracleCommand ...