Question

我正在尝试替代Python / pandas导出过程，并直接从Oracle转到csv。我看过几篇类似here

的帖子

假设我在Oracle中有一个包含三列的表：ColA，ColB，ColC。我想使用一个命令行实用程序，该实用程序将一条SQL命令作为输入，并生成一个CSV文件，该文件看起来像带有标题行和值行的任何标准CSV文件：

ColA,ColB,ColC
A,B,C
D,E,F
...

在SQL Server中，有一个名为bcp的实用程序，我可以使用它，如下所示：

bcp "SELECT 'ColA', 'ColB', 'ColC' UNION ALL Select ColA, ColB, ColC From 
myTable" queryout "C:\Temp\csvfiles\output.csv" -c -CRAW -S localhost -u 
my_userid -p my_password -d my_database

轻松自在。但是在寻找与Oracle相当的产品时，并没有那么多。

我看了here，但是作者希望您创建一个UTL_FILE。这似乎不太可能，因为这应该是一个完全通用的过程，是从Python构建并运行的。我看了sqlplus，但似乎无法想出一种创建类似于bcp的典型CSV的方法。 here这个文档也不是很清楚。我希望看到的例子是如此普遍。

类似here的站点显示了如何使用sqlplus输出固定长度的CSV，但没有显示如何添加标题行和填充值，这虽然可以，但并不理想。这是我能想到的最好的结果：

set colsep ,
set headsep off
set pagesize 0
set trimspool on
set linesize 200
set numwidth 50
SET TERMOUT OFF

Spool output.csv

SELECT ColA,
    ColB,
    ColC
FROM MyTable;

Spool off
exit

那么，在Oracle中是否有与可信赖的bcp等效的工具/命令，或者在某处使用sqlplus的示例可以生成类似于上述带有标题行且没有所有前导空格的csv？还是有另一个选择可以从随机Oracle表生成动态CSV文件？还是我坚持使用Python，pyodbc和pandas来获取格式正确的CSV文件？ TIA

Answer 1

Oracle的SQLcl实用程序（命令行可执行文件sql或sql.exe）可以帮助您实现它。

这是下载链接SQLcl。它是免费的。

要以CSV格式导出文件，您只需指定

SET SQLFORMAT CSV

如果要使用其他定界符，请使用

SET SQLFORMAT DELIMITED '|'

这是带有标题的示例输出

SQL> select * from employees;
"EMPLOYEE_ID","FIRST_NAME","LAST_NAME","EMAIL","PHONE_NUMBER","HIRE_DATE","JOB_ID","SALARY","COMMISSION_PCT","MANAGER_ID","DEPARTMENT_ID"
    198,"Donald","OConnell","DOCONNEL","650.507.9833",21-06-07,"SH_CLERK",2600,,124,50
    199,"Douglas","Grant","DGRANT","650.507.9844",13-01-08,"SH_CLERK",2600,,124,50
    200,"Jennifer","Whalen","JWHALEN","515.123.4444",17-09-03,"AD_ASST",4400,,101,10
    201,"Michael","Hartstein","MHARTSTE","515.123.5555",17-02-04,"MK_MAN",13000,,100,20
    202,"Pat","Fay","PFAY","603.123.6666",17-08-05,"MK_REP",6000,,201,20
    203,"Susan","Mavris","SMAVRIS","515.123.7777",07-06-02,"HR_REP",6500,,101,40
    204,"Hermann","Baer","HBAER","515.123.8888",07-06-02,"PR_REP",10000,,101,70
    205,"Shelley","Higgins","SHIGGINS","515.123.8080",07-06-02,"AC_MGR",12008,,101,110
    206,"William","Gietz","WGIETZ","515.123.8181",07-06-02,"AC_ACCOUNT",8300,,205,110
    100,"Steven","King","SKING","515.123.4567",17-06-03,"AD_PRES",24000,,,90
    101,"Neena","Kochhar","NKOCHHAR","515.123.4568",21-09-05,"AD_VP",17000,,100,90
    102,"Lex","De Haan","LDEHAAN","515.123.4569",13-01-01,"AD_VP",17000,,100,90
    103,"Alexander","Hunold","AHUNOLD","590.423.4567",03-01-06,"IT_PROG",9000,,102,60
    104,"Bruce","Ernst","BERNST","590.423.4568",21-05-07,"IT_PROG",6000,,103,60
    105,"David","Austin","DAUSTIN","590.423.4569",25-06-05,"IT_PROG",4800,,103,60
    106,"Valli","Pataballa","VPATABAL","590.423.4560",05-02-06,"IT_PROG",4800,,103,60
    107,"Diana","Lorentz","DLORENTZ","590.423.5567",07-02-07,"IT_PROG",4200,,103,60
    108,"Nancy","Greenberg","NGREENBE","515.124.4569",17-08-02,"FI_MGR",12008,,101,100
    109,"Daniel","Faviet","DFAVIET","515.124.4169",16-08-02,"FI_ACCOUNT",9000,,108,100

此外，所有SQL * Plus命令均受支持，而很少有特定于SQLcl的命令。查看此command line reference

Answer 2

SET MARKUP CSV ON-在执行查询以csv格式获取数据之前，在sqlplus中使用它

无法使用sqlplus将动态Oracle表导出为格式正确的CSV

2 个答案: