[英]How to get sum of values in MySql
我有表:
id name amount
--------------------------
1 abc 1
2 abc 2
3 abc -3
4 def 4
我想得到名称== abc的每个金额的总和,我的意思是1 + 2 +(-3)= 0;
如何在MySql中做到这一点?
SELECT SUM(amount) FROM table WHERE name = 'abc';
不确定mySQL,但是“标准” SQL将是:
select sum(amount) from yourTableName where name='abc'
SELECT SUM(amount) AS total FROM table WHERE name = 'abc'
SELECT name, SUM(amount) from Table GROUP BY name;
SELECT SUM(amount)
FROM tableName
WHERE name='abc'
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