mysql计算所有行的总和

I have a mysql table that has a number of rows, and in each row a field called "value", the field value will differ from row to row. What I want, is to select all the rows and count the sum of all the "value" fields.

我有一个包含多个行的mysql表，并且在每一行中都有一个名为“value”的字段，字段值因行而异。我想要的是选择所有行并计算所有“值”字段的总和。

any idea?

任何想法？

6 个解决方案

#1

Do you mean like this?

你的意思是这样的吗？

SELECT    SUM(value)
FROM      myTable

If you have multiple columns to return, simply add each non-aggregate (i.e., summed) row to the GROUP BY clause:

如果要返回多个列，只需将每个非聚合（即，求和）行添加到GROUP BY子句：

SELECT    firstName, lastName, SUM(value)
FROM      myTable
GROUP BY  firstName, lastName

#2

SELECT SUM(value) as total FROM table;

$row['total'];

#3

SELECT SUM(`value`) FROM `your_table`

#4

SELECT SUM(value)
    FROM YourTable

#5

What you'll want is the GROUP-function named SUM.

你想要的是名为SUM的GROUP函数。

#6

This query will return the sum of value and the number of rows count:

此查询将返回值的总和和行数：

SELECT count(*), sum(value) FROM tablename

#1