Table and Variables

Table and Variables

Tables and variables serve the same purpose of storing values from a web page, but there are some key differences between the two.

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Data Types

Each column in a table has a strict data type. For example, when you extract text and want to insert it into a column with the text data type, the value will be converted to text before being inserted into the column.

In contrast, variables are not bound to any specific data type. This means you can store text, numbers, objects, or arrays in a variable without the need for conversion.

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Data Insertion

Every time you insert a value into a table, the value will be pushed to the last row of the selected column.

For example :

name	price
Ao thin	1000
Quan dai	2000

After inserting a new value :

Name	price
Ao thin	1000
Quan dai	2000
	5000

But in a variable, the value will be overwritten with the new value.