MySQL 如何在选择结果中选择列的总和？
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How to select sum of column in result of select?
提问by SomeUser
How to select sum of column in result of select?
如何在选择结果中选择列的总和？
回答by Daniel Vassallo
SELECT
SUM(your_column) AS Total
FROM
your_table;
... or is this a trick question? :)
......或者这是一个棘手的问题？:)
回答by Filip Ekberg
Hereis a list of MySQL built in functions for the group by aggregate
以下是按聚合分组的 MySQL 内置函数列表
AVG() Return the average value of the argument BIT_AND() Return bitwise and BIT_OR() Return bitwise or BIT_XOR()(v4.1.1) Return bitwise xor COUNT(DISTINCT) Return the count of a number of different values COUNT() Return a count of the number of rows returned GROUP_CONCAT()(v4.1) Return a concatenated string MAX() Return the maximum value MIN() Return the minimum value STD() Return the population standard deviation STDDEV_POP()(v5.0.3) Return the population standard deviation STDDEV_SAMP()(v5.0.3) Return the sample standard deviation STDDEV() Return the population standard deviation SUM() Return the sum VAR_POP()(v5.0.3) Return the population standard variance VAR_SAMP()(v5.0.3) Return the sample variance VARIANCE()(v4.1) Return the population standard variance
AVG() Return the average value of the argument BIT_AND() Return bitwise and BIT_OR() Return bitwise or BIT_XOR()(v4.1.1) Return bitwise xor COUNT(DISTINCT) Return the count of a number of different values COUNT() Return a count of the number of rows returned GROUP_CONCAT()(v4.1) Return a concatenated string MAX() Return the maximum value MIN() Return the minimum value STD() Return the population standard deviation STDDEV_POP()(v5.0.3) Return the population standard deviation STDDEV_SAMP()(v5.0.3) Return the sample standard deviation STDDEV() Return the population standard deviation SUM() Return the sum VAR_POP()(v5.0.3) Return the population standard variance VAR_SAMP()(v5.0.3) Return the sample variance VARIANCE()(v4.1) Return the population standard variance
I believe that you want SUM()
我相信你想要 SUM()
回答by Andreas Aarsland
SELECT SUM(sales) as "Revenue" FROM details;
SELECT SUM(sales) as "Revenue" FROM details;
回答by Fergal Moran
SELECT SUM(col) FROM table
SELECT SUM(col) FROM 表
