MySQL Group by SUM

I have category in a table like

table(cat_name,amount);

How to get 开发者_StackOverflowthe sum of amount each cat_name Grouped by cat_name

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SELECT cat_name, SUM(amount) AS total_amount
FROM table
GROUP BY cat_name

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SELECT cat_name, SUM(amount) AS TotalAmount
FROM Table
GROUP BY cat_name