table:
Column1 | Column2 | Column3 |
Value1 | Null |
SELECT Column1+Column2+Column3 will return Null
SELECT Column1+Column2+IsNull(Column3,‘‘) return Value1
时间: 2024-08-25 15:17:04
table:
Column1 | Column2 | Column3 |
Value1 | Null |
SELECT Column1+Column2+Column3 will return Null
SELECT Column1+Column2+IsNull(Column3,‘‘) return Value1