使用MySQL SUM()查找总和并为列标题提供别名
对于别名,请使用以下语法,其中显示别名:
select sum(yourColumnName) as anyAliasName from yourTableName;
让我们首先创建一个表-
mysql> create table DemoTable1800 ( Salary int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable1800 values(18000); mysql> insert into DemoTable1800 values(32000); mysql> insert into DemoTable1800 values(50000);
使用select语句显示表中的所有记录-
mysql> select * from DemoTable1800;
这将产生以下输出-
+--------+ | Salary | +--------+ | 18000 | | 32000 | | 50000 | +--------+ 3 rows in set (0.00 sec)
这是查询查找总和并为列标题设置别名-
mysql> select sum(Salary) as Total from DemoTable1800;
这将产生以下输出-
+--------+ | Total | +--------+ | 100000 | +--------+ 1 row in set (0.00 sec)