Sql server 返回Select语句中带刻度的除数结果

我正在尝试运行此查询，但在进行数学计算后，似乎没有正确格式化数字。刻度应为2，但它不会按应有的方式显示

SELECT 30 / 60 as Diff FROM Table

它返回为

0

SELECT Convert( Numeric(8,2), 30 / 60 ) as Diff FROM Table

返回值为

0.00

---

如何根据需要使其返回

0.50

？

在除法之前将其转换为数值，或将实数而不是整数除法。当进行整数运算时，任何小数都会被删除。分数被删除后转换对你没有任何好处

SELECT CONVERT(NUMERIC(8,2),30.0/60.0) AS DIFF FROM TABLE

或者如果选择列而不是使用数字

SELECT CONVERT(NUMERIC(8,2),columnA)/CONVERT(NUMERIC(8,2),columnB) AS DIFF FROM TABLE

---

（为了确保除法是按照我们想要的规则进行的，将两者进行转换）

在进行除法之前将其转换为数值，或者将实数而不是整数进行除法。当进行整数运算时，任何小数都会被删除。分数被删除后转换对你没有任何好处

SELECT CONVERT(NUMERIC(8,2),30.0/60.0) AS DIFF FROM TABLE

或者如果选择列而不是使用数字

SELECT CONVERT(NUMERIC(8,2),columnA)/CONVERT(NUMERIC(8,2),columnB) AS DIFF FROM TABLE

---

（将两者进行转换，以确保按照我们想要的规则进行分割）

您可以尝试以下方法，实现方法很少。使用变量，或仅对字段本身执行

CAST

，

CONVERT

 SELECT (CAST(30 AS DECIMAL(8,2)) / CAST(60 AS DECIMAL(8,2))) as Diff FROM Table

 SELECT (CAST(30/60) AS DECIMAL(8,2)) as Diff FROM Table

 SELECT (30/60.0) as Diff FROM Table;

 SELECT CONVERT(DECIMAL(8,2), 30/60.0) as Diff FROM Table

---

请看一下这个：

您可以尝试以下方法，实现它的方法很少。使用变量，或仅对字段本身执行

CAST

，

CONVERT

 SELECT (CAST(30 AS DECIMAL(8,2)) / CAST(60 AS DECIMAL(8,2))) as Diff FROM Table

 SELECT (CAST(30/60) AS DECIMAL(8,2)) as Diff FROM Table

 SELECT (30/60.0) as Diff FROM Table;

 SELECT CONVERT(DECIMAL(8,2), 30/60.0) as Diff FROM Table

---

请看以下内容：

谢谢你的回答，但你能举个例子吗？@tvanfosson Hi感谢你注意到前面的打字错误：）我想我是在来回转换。谢谢你的回答，但是你能举个例子吗？@tvanfosson Hi感谢你注意到前面的打字错误：）我想我是在来回转换。