一个字符串转数字的小功能,
with t as ( select '-' as col1 --isnumeric('-')这里会判断为数字,所以不能用 union all select '1' as col1 union all select '2' as col1 union all select '3.4' as col1 union all select 's' as col1 ) select col1, convert(numeric(10,4), -- case WHEN isnumeric(col1)=1 then col1 else 0*1.0 end case WHEN PATINDEX('%[^0-9|.|-|+]%',col1)=0 THEN col1 ELSE 0*1.0 end ) as cc from t
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