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fetchall() fetches all the rows of a query result. An empty list is returned if there is no record to fetch the cursor.
fetchone() method returns one row or a single record at a time. It will return None if no more rows / records are available.
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A spreadsheet is a computer application for organization, analysis, and storage of data in tabular form. Spreadsheets were developed as computerized analogs of paper accounting worksheets.
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An SQL join clause – corresponding to a join operation in relational algebra – combines columns from one or more tables in a relational database. It creates a set that can be saved as a table or used as it is. A JOIN is a means for combining columns from one or more tables by using values common to each.
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