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有沒有辦法選擇虛擬列作爲另一列的百分比,記錄的最大值是100%?選擇虛擬列作爲百分比
Example: +------------------------------+ | tbl_test | +------------------------------+ | id | col_x | value | percent | +------------------------------+ | 1 | a | 2 | 25 | | 2 | b | 5 | 62.5 | | 3 | c | 8 | 100 | | 4 | d | 3 | 37.5 | +------------------------------+
正如你可以看到8成爲100%,其餘被計算爲8
SELECT * ,() as percent
FROM tbl_test