What is the essential difference between a spreadsheet and a relational database table? Prepare a message with examples.

In relational databases – there can be no two identical rows – the columns are arranged in a specific order, which is created when the table is created. The table may not have a single row, but there must be at least one column. – each column has a unique name (within the table), and all values in one column are of the same type (number, text, date.) – at the intersection of each column and row there can be only an atomic value (one value not consisting of a group values).

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