sql - Find the place of decimal point in decimal number

Question

How to find place of decimal point in a decimal number in SQL Server using sql query

example:

123567.89

output:7

score 2 · Accepted Answer

2

select charindex('.', cast(123567.89 as varchar))

SQLFiddle 演示

于 2013-10-28T16:32:28.643 回答

score 0 · Accepted Answer

declare @T decimal(38,1) = 1234567890123456789012345678901234567.1;
select charindex('.', cast(@T as varchar(40)));

如果只使用varchar，则默认大小为30；因此，它会失败。除此之外，如果这是在计算列中并且使用了 varchar，则默认大小为 1。

40 = 38 +“小数点”加“符号”

--select charindex('.', cast(@T as varchar)); -- Uncomment and it'll fail