SQL 2008 : Using SQL SSIS Package, I am exporting Excel Sheet to Text File and then Exporting to SQL Database. I decided to follow two steps of Export process as because of datatype mismatch between SQL Database and some of Excel Columns. When there is a mismatch in the Datatype, SSIS Package stops the Export Process but results as SSIS Package ran successfully.
To avoid partial import of Excel sheet, i decided to follow two steps of export. When different datatype of Excel Sheet goes to Text File, it reflect as String. When i am exporting back from Text file to SQL Database,it goes as STRING and again failing to export due to datatype mismatch.
Major Issue : If there is a mismatch in the Excel Sheet at nth row, Export stops at the nth row. Still, we get the output as Package Successful.
How to fix the datatype mismatch of Excel Data Export to SQL Database ?
You could approach it slightly differently as follows: read the excel spreadsheet in directly to one or more staging table(s) but force all columns to be VARCHAR/NVARCHAR columns. This will then enable you to read all rows into SQL without errors. Then create a second DFT to read from the staging table(s) into your correctly defined table(s)(correctly defined in terms of field type/size). You can build error logging into the second DFT to pump erroneous rows into an error table for later attention.
Related
I have a simple DataFlow with two objects the source which is a mdb file and the destination which is an MSSQL database.
The idea is to migrate the data from one to another.
The problem is that the data is extracted from an Access query, and one column has ~1000 characters, and in SSIS in advanced properties the external column has the default 255 length so when i execute the task it tries to truncate it. To disable the throw error on truncate is not an option, and modifying the Length of the external column cannot be done, it throws and error regarding the metadata.
First of all can anyone explain WHY?
Second of all i need a resolution and i need it fast because it's kinda driving me crazy.
This kind of problem occours, because the ssis task "guesses" the length of the column by inspecting the first 100(afaik) rows. So if all rows from 1 to 100 have a length of 10 and the row 101 has the legnth of 11, the task will fail, because the length was "guessed" to 10.
Modifying throws an error, because you have validateExternalMetadata set to true. To solve this problem, go to advanced options of your import task (access) and set the value to false.
This means, the task will accept modified values you entered without checking it.
Did you try to SSIS Import and Export Wizard to import the data, from within the BI development environment? That is the easiest way with MsAccess as this not only imports the data but also saves the package. If you get an error during the import ( using the wizard), please post it, as this helps in further investigation. Also, as #stb suggested, try having the first record over 1000 characters.
Access supports queries which are the equivalent to views in MSSQL.
The column size is defined not by looking at a few results but by the default column length of the column data type.
I created another table with the desired data types and before the data flow i've put in the package 2 sql scripts: one to delete all the data in the table and one to execute the query against the table, as to treat it as a temporary table.
Then the actual data flow is executed against this pseudo-temporary table.
This solved my problem.
I am trying to copy data from a flat file to a SQL table using SSIS.
I have a Data Flow Task where I have created a Flat File Source pointing to the csv file and an OLE DB Destination pointing to the table I want the data in.
The problem I am facing is when I run the package, I get only 2621 rows copied to the SQL destination table, where I have about 1,70,000 records in the csv. Not sure why this is happening.
Thanks in advance.
This could be a number of things. This is what comes to mind:
The connection string to your flat file is overwritten by a variable expression or a package configuration. Check SSIS -> Package configurations or the Expressions properties on your connection manager.
The DataRowsToSkip property on your flat file connection manager is set to a value.
The meta data definition of your flat file is incorrectly configured in your connection manager. See properties such as Format, Row delimiter, Column delimiter, etc. Use the preview function to see the output.
The error output on your flat file source is set to Ignore failure, meaning that lines which SSIS cannot process (due to, e.g., incompatible data types) are ignored without warning.
First I'd like to say that I'm brand new to SSIS so bear with me if this is a very basic question. I've searched and cannot find an answer.
I need to read data from SQL Server that is stored in a varbinary column that contains an excel document. I then need to store this data into another table with the appropriate columns (pre-defined format).
My question is essentially... How do I read this varbinary data into something I can work with and then insert into another table?
You could use Export Column Transformation available within the Data Flow Task to read the varbinary data and then save it as a file on local disk where the SSIS package is running.
MSDN documentation about Export Column transformation.
Sample: The Export Column Transformation on BI Monkey
Using another data flow task, you can read the saved file and import the data into the table of your choice.
I am trying to create an SSIS package for integrating between MSSQL and MYSQL. I have no prior experience of working with Bids or SSIS and following the instructions from here.
I added the OLE DB Source, Lookup, Conditional Split, OLE DB Destination and OLE DB Command components to the Data Flow and configured the connection managers and column mappings upto the Conditional Split component.
From here, I am facing two problems -
1) After configuring the OLE DB Destination, it shows error symbol on the component that says could not convert between unicode and non unicode string datatypes. To solve this, I tried to insert a Data Conversion Component between the Conditional Split and the Destination and configured it for the problematic column. But that doesnt seem to help
2) While configuring the OLE DB Command, the right hand side column in Column mappings tab shows zero columns. I have added the Sql command with question marks so i guess it should be showing columns named "Param_0", "Param_1" etc if i am not wrong. I even tried to add them manually from the input and output properties tab but then it shows the warning, external columns for OLE DB command are out of sync with data source
What am I missing here ?
Thanks
The way you describe your first problem, it sounds like it should work. Here are a couple of things to check.
The data conversion component creates a new column for the converted data. Make sure you are referring to it in your following transformations and destination.
Right-click on the Data Conversion component and select Advanced Editor. Select the Input and Output Properties tab in the Advanced Editor. Expand the Data Conversion Output branch of the tree-view and select your new column. Ensure that the Data Type Properties show the data type that you want to convert too. If these values are not right then something is not right with the setup in the component.
For your second problem, the issue can frequently be caused by an error with the SqlCommand value. First, make sure the Connection Manager is correct on the Connection Manager tab. Switch to the Column Mappings tab. Near the bottom of the form, there may be a warning message that indicates that the SQL statement cannot be prepared. In other words, SSIS can't figure out what the statement is supposed to do. Address any problems with the SQL statement and switch back to the Column Mappings tab. The columns will appear once the SQL statement can be parsed.
If you want to avoid the conversion issues then change your destination table column types from char/varchar to nchar/nvarchar. I'm pretty sure you will need to use an ADO connector for mysql source and destinations, you should be able to read data from the mysql source and write to the mssql database w/o using anything other than source and destination components.
What is the correct way of importing data from Excel 2007 file to SQL Server database 2008? The data from excel file should be transferred successfully even if the data in Excel file is changed / replaced with different data except the column name at first row.
Excel is very finicky about how you remove rows from it. Your best bet is to select all rows below the column headers and right click and delete. If you simply clear contents and then don't paste in as many rows, it looks to SSIS like you have rows with nulls in them which sometimes causes the types of errors you are seeing.