Organizing data in a spreadsheet as if it was an SQL table is not a good idea. In one hand, if you're organized like that, you come up with a schema and follow

Organizing data in a spreadsheet as if it was an SQL table is not a good idea. In one hand, if you're organized like that, you come up with a schema and follow it, why aren't you using SQL directly? On the other hand, by using spreadsheets as tables you lose 80% of the spreadsheet's flexibility and powers.