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Posted by / 06-Jan-2018 01:15

Insert command for updating an excel spreadsheet

With ODBC, you can summarise, and select just the data you need, in an Excel workbook before importing it into SQL Server.You can join data from different areas or worksheets.Sure, you could type the data into the Word document or you could copy-and-paste it, but these methods require manual updating in Word whenever the data changes in Excel.Perhaps the best way of handling this situation is to link the data from Excel into Word as described below.To begin, consider the data shown below in Figure 1.

Now, lets continue to imagine that you have a corresponding table in SQL Server: So, the situation is thus; We want to update records that exist in both the table and the Excel file and insert those that exist in the Excel file but not in the table. Under Control Flow we need to add a new Control Flow Item – Data Flow. Now double click on this item, or select the Data Flow tab. Drag the line from the Merge Join to the conditional split 2.

At this stage we can determine which rows of the Excel sheet are new, and which exist already. Before sorting the columns, I would advise converting the Excel columns to the same type as database columns, in this case I have selected the four columns: a. The data belonging to the new row will be inserted into the table, and the data belonging to the Existing Row will update said row. Drag the line from the conditional split to the OLE DB Destination, you will be prompted to choose the output, you want to select New Row (as defined in the Conditional Split) 4.

To do this we use a conditional split where we ascertain if the UID is null (from the database table), if it is we know this is a new row and so should be inserted into the table, if it isn’t we know this row exists in the table and so the row should be updated (perhaps one of the column values has changed). Choosing the mapping tab and ensure they map to the columns in the table That is the insert sorted, how about the update; 1. Drag the green line from the conditional split to the OLD DB Command, you will be prompted to choose the output, select Existing Row (as defined in the conditional split) 3.

It is a Once and Future technology, developed before its time, but now showing its value for processing large volumes of data, despite its quirks, poor documentation and lackluster support.

If you use the ODBC driver, then your Excel workbook becomes a little SQL-based relational database.

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