问题描述
情况是这样的：
我有200个txt文件，它们的名称不同，例如 601776.txt ，每个文件的名称实际上是一个ID_foo，它包含这样的数据（2列）：
I have 200 txt files with different names like 601776.txt each file's name is actually an ID_foo and it contains some data like this (2 columns):
04004 Albánchez
04006 Albox
04008 Alcóntar
04009 Alcudia de Monteagud
.
.
.
现在我要批量插入这些TXT文件到SQL Server表中，具有3列，这些列之一应为txt文件的名称。我使用的是PHP脚本，因此循环搜索了文件名，然后呢？
now I wanna BULK INSERT these TXT files into a SQL Server Table which has 3 column one of these columns should be the name of the txt file. I'm using a PHP script, so I made a loop to get the file names and then what?
BULK INSERT Employee_Table
FROM '../home/601776.txt'
WITH (
FIELDTERMINATOR ='\t',
ROWTERMINATOR = ''\n''
)
在每个循环中使用$ file_name变量批量插入时，如何设置第三列？
how can i set the third column while bulk inserting with $file_name variable in each loop?
您认为这是一个更好的主意吗？可以通过逐行读取txt文件来插入表格？以及如何？
Do you think it is a better idea if it is possible to insert the table by reading the txt file line by line? And how?
谢谢
推荐答案
这是少数几个之一在SQL Server中，游标实际上是理想的时间。这是一种方法。一旦看到PRINT语句并感到满意，您可以将其注释掉，并取消注释它下面的两行。我添加了一些逻辑来添加文件名和通常需要的处理日期，但是您的表定义将需要这些列。它应该使想法。
This is one of the few times that a cursor is actually ideal in SQL Server. Here's a way. Once you see the PRINT statement and are satisfied you can comment it out and uncomment out the two lines below it. I put some logic in to add the file name and a processed date which is usually needed, but your table definition would need these columns. It should get the idea across.
---------------------------------------------------------------------------------------------------------------
--Set some variables
---------------------------------------------------------------------------------------------------------------
DECLARE @dt VARCHAR(10) --date variable but stored as VARCHAR for formatting of file name
DECLARE @fileLocation VARCHAR(128) = 'E:\DATA_TRANSFERS\' --production location which is \\issqlstd01 but the xp_dirtree didn't like this
DECLARE @sql NVARCHAR(4000) --dynamic sql variable
DECLARE @fileName VARCHAR(128) --full file name variable
---------------------------------------------------------------------------------------------------------------
--Get a list of all the file names in the directory
---------------------------------------------------------------------------------------------------------------
IF OBJECT_ID('tempdb..#FileNames') IS NOT NULL DROP TABLE #FileNames
CREATE TABLE #FileNames (
id int IDENTITY(1,1)
,subdirectory nvarchar(512)
,depth int
,isfile bit)
INSERT #FileNames (subdirectory,depth,isfile)
EXEC xp_dirtree @fileLocation, 1, 1
---------------------------------------------------------------------------------------------------------------
--Create a cursor to fetch the file names
---------------------------------------------------------------------------------------------------------------
DECLARE c CURSOR FOR
select subdirectory from #FileNames where isfile = 1
OPEN c
FETCH NEXT FROM c INTO @fileName
---------------------------------------------------------------------------------------------------------------
--For each file, bulk insert
---------------------------------------------------------------------------------------------------------------
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql = 'BULK INSERT Employee_Table FROM '''+ @fileLocation + @fileName +''' WITH (FIELDTERMINATOR = ''\t'',KEEPNULLS,ROWTERMINATOR = ''0x0a'')'
--Try the bulk insert, if error is thrown log the error
--Also update the Table Columns which aren't a part of the original file (load date and original file name)
BEGIN TRY
PRINT(@sql)
--EXEC(@sql)
--UPDATE Employee_Table SET OrigFile = @fileName, LoadDate = GETDATE() WHERE OrigFile IS NULL
END TRY
BEGIN CATCH
SELECT ERROR_MESSAGE()
END CATCH
FETCH NEXT FROM c INTO @fileName
END
CLOSE c
DEALLOCATE c
GO
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