使用带双引号的 bcp 实用程序导出数据答案

【问题标题】：Export data with bcp utility with double quotes使用带双引号的 bcp 实用程序导出数据
【发布时间】：2019-05-18 10:33:09
【问题描述】：

我正在尝试使用 bcp 实用程序 命令行从 MS sql 服务器导出数据。问题是在导出的输出中缺少第一行的第一个双引号，我无法解释原因。

在我用于导出的命令下方：

 /opt/mssql-tools/bin/bcp db_schema out dump.csv -c -t"\",\"" -r"\"\n\"" -S my_host -U my_user

但输出结果缺少导出的csv文件第一行（仅第一行）的第一个双引号：

801","40116","Hazelnut MT -L","Thursday Promo","Large","","5.9000","","801","1.0000","","3.6500","2.2500",".0000","default","","","","","Chatime","02/06/2014","09125a9cfffd4143a00e73e3b62f15f2","CB01","",".0000","5.9000","6.9000",".0000",".0000",".0000",".0000",".0000",".0000","0","","0","0","0","","","","","","","","","Modern Milk Tea","","","0","","","1","0","","","","","","","","0","Hau Chan","","","","","","","","","","0","","","","","","","-1","","","","","","","","","","","","0","00000000420714AA","2014-06-02","1900-01-01","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","",""

我错过了什么吗？

【问题讨论】：

您为 -t 和 -r 传递的值对我来说看起来很可疑。您希望字段和行终止符（分别）是什么？
@BenThul 我会用预期的结果和我得到的错误结果更新问题。

标签： sql-server regex shell bcp

【解决方案1】：

如果您知道字段名称，可以尝试以下方法：

Create Table [names]
(
Id Int,
fname VarChar(15),
lname VarChar(25)
)
Insert Into names Values
(1, 'Jim', 'Morrison'),
(2,'Robert', 'Plant'),
(3,'Janis', 'Joplin')

BCP 命令：使用 quotename() 和 char(34)

（此 BCP 命令使用可信连接）

bcp "SELECT quotename(Cast(Id As VarChar(15)),char(34)), quotename(fname,char(34)), quotename(lname,char(34)) FROM names" queryout dump.csv -c -t"," -S SERVER -d DBNAME -T

结果：

"1","Jim","Morrison"
"2","Robert","Plant"
"3","Janis","Joplin"

【讨论】：

巧妙地使用quotename()。我要把那个放在我的花样包里！

【解决方案2】：

我敢打赌，您在文件末尾也有一行只是一个双引号。为什么？使用您提供的命令行开关，您说的是“以"," 结束每个字段，以"\n" 结束每一行”。这就是它正在做的事情。

因此，第二行和后续行以双引号开头，因为前一行以一个结尾。

Clippy DBA 说“您似乎正在尝试生成 CSV”。不知道为什么，我很难……呃……Clippy 提出一个替代方案。具体来说，读取这个文件的内容是什么？你会用 Excel 或其他需要特定格式的东西来阅读这个吗？您会将其导入到另一个数据库表中吗？

【讨论】：

【解决方案3】：

level3looper 提供的quotename 答案适用于您的情况。

为了完整起见，我提供了一个我过去为相同目的提供的解决方案。我更喜欢这个，因为它在格式文件中保留了格式的定义，这是我更喜欢去获取该信息的地方。报价名称是快速、临时工作的好解决方案，但对于自动化、业务流程，我建议使用下面的链接。

基本上，您只需在提取文件定义的开头添加一个“虚拟”列，并用单个双引号分隔该列。然后你还要在格式文件中记下跳过第一列。这只会在行首提供双引号。

sql server bcp bulk insert pipe delimited with text qualifier format file

【讨论】：