Java PostgreSQL对resultset中的数值求反
我有一个查询返回Java PostgreSQL对resultset中的数值求反,java,postgresql,sql,select-query,Java,Postgresql,Sql,Select Query,我有一个查询返回十进制(30,12)类型数据的结果集 SELECT sales from invoice_index; 此查询向我提供如下输出: sales ------ 100 -200 300 但我需要如下输出: sales ---- -100 200 -300 要对值求反,只需将其乘以-1 SELECT sales * (-1) from invoice_index; 要对值求反,只需将其乘以-1 SELECT sales * (-1) from invoice_index;
十进制(30,12)
类型数据的结果集
SELECT sales from invoice_index;
此查询向我提供如下输出:
sales
------
100
-200
300
但我需要如下输出:
sales
----
-100
200
-300
要对值求反,只需将其乘以-1
SELECT sales * (-1) from invoice_index;
要对值求反,只需将其乘以-1
SELECT sales * (-1) from invoice_index;