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The Import Text Wizard determines the type of text le
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The Import Text Wizard determines the le s characteristics
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8 After completing the field information, click Next; the wizard suggests specifying a primary key field by letting the wizard add one or by specifying an existing field, or you can choose not to have a primary key (Figure 22-8) Click Next 9 Enter a name for the new table and click Finish 10 Click Yes if you want to save the import process for later use and enter a name and description for the import specifications
TIP If the import process seems to be taking a long time, errors could be occurring Press ctrl-break
to cancel anytime during the process Linking delimited text files with the Link Text Wizard is the same as importing, with two exceptions: you are not asked if you want to link to an existing table or create a new one, and you are not prompted for a primary index because you are not creating a new table
Using Fixed-Width Text Files
The Import Text Wizard reacts a little differently once fixed-width text files are detected The second wizard dialog box (Figure 22-9) shows the fixed-length data with vertical lines between fields and a ruler at the top The wizard asks you to confirm whether the lines indicate the proper separation point between fields and provides guidance for how to move or reposition the lines:
22:
E x c h a n g e D a t a b a s e O b j e c t s a n d Te x t
About Import Errors
It is possible that improperly defined data or data of an improper length could cause errors If this occurs, Access creates an Import Errors table containing descriptions of the errors that occurred while importing the text file or spreadsheet into an Access database The table shows the field names and row numbers of the data that caused the error Some of the possible import errors are shown here: Field Truncation Occurs when the text value is longer than the Field Size property setting for the destination field Type Conversion Failure destination field Key Violation Occurs when a value is the wrong data type for the
Occurs when a duplicate primary key value appears
Validation Rule Failure Occurs when a field value breaks the rule defined in the Validation Rule property for the destination field Null in Required Field Occurs when the Required property of the destination field is set to Yes and a Null value occurs Null Value in AutoNumber Field Occurs when the data intended for an AutoNumber field contains a null value Unparsable Record Occurs when a text value contains a character specified as the text delimiter character If the problem is with the data, edit the file If you re trying to append data to an existing table, you may need to change the table definition After correcting the problems, import the file again When a value contains the delimiter character, edit each field to repeat the character twice When you finish, check the destination files to make sure that some of the records are not duplicated To create a line, click at the position where a field separation is desired Two lines have been added in Figure 22-9 To delete a line, double-click the line to remove the field separation To move a line, click and drag the line to the proper position Once adjustments are completed, the process of identifying the destination table and completing the import or link is the same as with delimited files
PART IV
Changing Import Specifications
You can change the import specifications for a text file using the Advanced features of the Import Text Wizard Click the Advanced button in the Import Text Wizard dialog box to display the Import Specification dialog box (Figure 22-10), which enables you to specify a number of table characteristics, including the following: The file format (delimited or fixed-width) If delimited, the field delimiter and text qualifier characters
Part IV:
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