What are the restrictions and limitations for using importrange() and importdata() functions in Google Sheets?

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The restrictions and limitations for using importrange() and importdata() functions in Google Sheets are:

1. Security Restrictions: Importrange() can only be used to import data from sheets that the user has permission to access. Importdata() can only import data from publicly available sources.

2. Data Range Restrictions: Importrange() can only import data from a certain range of cells, and not the entire sheet. Importdata() can only import data from a single cell.

3. Imported Data Structure: Imported data through importrange() or importdata() may not always be in the format you need. It may require additional formatting and cleaning.

4. Limited Analytical Functionality: Imported data may not always allow analytical functions like filters, sorting, and pivot tables.

5. Performance Issues: Importrange() and importdata() can sometimes slow down the sheet’s performance if there is too much data being imported or the range of the data is too large.

6. Frequency of Data Import: Importrange() can only be set to import data once per 30 minutes in each spreadsheet. Importdata() can only be imported once per sheet.