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导入表格的语法
原标题:Syntax for importing table

将外部表格导入创建的表格的语法是什么? 当我右键单击松鼠中的表格并单击导入文件时, 我总是会收到错误信息 : “ 数据库错误已经发生 。 我怀疑Netzilla 不支持文件导入 。 我如何使用 NZload 工具导入表格?

最佳回答

这里举一个例子说明如何使用 jdbc 装入外部数据。 这些命令大多也可以在 nzsql 客户端中运行。 在您的情况下, 请确保您的表格定义与外部文件的顺序相同, 以便简化 。

你在Netezza的真桌子:

LABDB(ADMIN)=> CREATE TABLE REAL_TABLE (c1 int, c2 char(1), c3 char(1));
CREATE TABLE
Elapsed time: 0m0.047s

您要导入的文件: c: est. file, 包含内容 :

1|a|x
2|b|z

创建外部表格 :

LABDB(ADMIN)=> CREATE EXTERNAL TABLE EXT_TEST SAMEAS REAL_TABLE USING (DATAOBJECT( C:	est.file ) REMOTESOURCE  JDBC );
CREATE EXTERNAL TABLE
Elapsed time: 0m0.015s

Check the data in your external table, using your squirrelsql or similar: SquirrelSQL Select from EXTERNAL TABLE

显示空真实表格 :

LABDB(ADMIN)=> SELECT * FROM real_table;
 C1 | C2 | C3
----+----+----
(0 rows)

Elapsed time: 0m0.063s

Now you can insert into your real table from the external table, using SquirrelSQL or similar: INSERT INTO REAL_TABLE SELECT * FROM EXT_TEST;

最后确认真实表格中的数据:

LABDB(ADMIN)=> SELECT * FROM real_table;
 C1 | C2 | C3
----+----+----
  2 | b  | z
  1 | a  | x
(2 rows)

Elapsed time: 0m0.074s

放下外部表格, 这将无法删除您用来装入的文件 。

LABDB(ADMIN)=> DROP TABLE EXT_TEST;
DROP TABLE
Elapsed time: 0m0.018s
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