如何使用基本 DML 操作在 db2 中创建外部 table

Question

我使用以下命令创建了外部 table

db2 "

CREATE EXTERNAL TABLE TEST(a int) using
  (dataobject '/home/db2inst2/test.tbl' )
  )
"
db2 "insert into TEST values(1)"
db2 "insert into TEST values(2)"

但看起来它正在取代价值。是否有任何选项可以附加文件并在外部 table 上执行基本的 DML 操作。如果 db2 V11.5

中还有其他选项可用，请告诉我

Answer 1

这不可能。

CREATE EXTERNAL TABLE statement

Restrictions

External tables cannot be used by a Db2 instance running on a Windows system.

Data being loaded must be properly formatted.

You cannot delete, truncate, or update an external table.

For remote external tables (that is, for external tables are not located in a Swift or S3 object store and for which the REMOTESOURCE option is set to a value other than LOCAL):

A single query or subquery cannot select from more than one external table at a time, and cannot reference the same external table more than once. If necessary, combine data from several external tables into a single table and use that table in the query.

A union operation cannot involve more than one external table.

另外：

For an unload operation, the following conditions apply:

If the file exists, it is overwritten.

如何使用基本 DML 操作在 db2 中创建外部 table

How to create external table in db2 with basic DML operation

sql

db2

db2-luw

db2-woc