WHERE(ISNULL(columnName,0)> 0)vs WHERE(columnName IS NOT NULL)AND(columnName> 0)

Question

SELECT * FROM tableName WHERE (ISNULL(columnName,0) > 0)

要么

SELECT * FROM tableName WHERE (columnName IS NOT NULL) AND (columnName > 0)

哪一个更好？

columnName具有int数据类型

Answer 1

您不需要在查询中检查空值,所以我猜这会更好.

SELECT * FROM tableName WHERE columnName > 0