我目前正在查询一个表格,其中有一些空值分布在周围。不需要指定每个列(也不更新实际数据),我就能用“BLANK”一词取代所有空值吗?
我考虑过使用CASE,但你似乎需要参考每一栏来做到这一点
不,您不能按您的要求做。这最好在应用程序层做 。
COALESCE( 栏名, “ 空白” ) as FirstNontNull
不,最好的方法是使用中纳, 但不幸的是,你必须在每一栏上这样做:
select isnull(your_field, "BLANK")
from your_table
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