TSQL:检查 varchar 是否可以转换为数字

2021-09-10 00:00:00 tsql sql-server

我正在尝试测试变量的值是否可以转换为数值.

I'm trying to test whether the value of the variable can be converted to a numeric value.

DECLARE @var1 VARCHAR(50)
SET @var1 = '1'

IF(ISNUMERIC(@var1) = 1)
    BEGIN
        PRINT 'It's numeric'
    END

到目前为止，我什么都不赌.我错过了什么吗?

So far, I'm betting nothing. Am I missing anything?

推荐答案

您的打印语句中存在引用问题

you've got a quoting issue in your print statement

DECLARE @var1 VARCHAR(50)
SET @var1 = '1'

IF(ISNUMERIC(@var1) = 1)
    BEGIN
        PRINT 'It is numeric'
    END

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