Question

I would like to bulk load a bunch of data into a Oracle database. I have written a program to easily format my data however I want. I see many examples of loading a csv file into Oracle, but they all require a control file for each table, linking it to one file.

It would be simple for me to create a script to generate all of the control files, however I would first like to know if it would be possibly to have all data in one file with table names designated in the data file?

For example:

"name1": "foo1",
"array1": [
      {
        name2: "foo2",
        "array2" : [
          {
            "name3" : "foo3",
            "array3": [
              {
                data : "ImData"
              }
            ]
          }

        ]

]

Disclaimer: This is a completely fictional database design and is not at all reflective of how I might store user data in the real world.

Answer 1

您可以使用UTL_FILE读取CSV。这将使您完全控制如何处理其内容。但这确实意味着你会浪费大量的时间和精力来处理SQL * Loader的微薄而缓慢的实现。你为什么要那样做？

每个数据源和/或目标一个文件是CSV生成的公认约定。这是合同的必要部分。如果我们想要做任何其他事情，那么我们需要使用更合适的协议，例如XML或JSON，这些协议可以支持程序化审讯。

Answer 2

为什么不使用SQLLdr？请参见SQLdr docs。请参阅“区分不同的输入记录格式”。

使用多个INTO表子句的好处

多个INTO TABLE子句使您能够：

将数据加载到不同的表中

从单个输入记录中提取多个逻辑记录

区分不同的输入记录格式

区分不同的输入行对象子类型

但是你必须在每一行指定表名（或它的ID）。 SQLLrd在行级工作，我担心它不支持节。

所以您可能需要将其更改为：

onefile.csv:
------------    
details,1, John, john@gmail.com
details,2, Steve, steve@gmail.com
details,3, Sally, sally@gmail.com
account,1, John, johntheman, johnh43
account,2, Steve, password, steve.12
account,3, Sally, letmein, slllya2

这看起来像是对旧COBOL格式的回忆。

Bulk loading into Oracle with all tables in one data file

2 个答案: