sql - 多部分标识符无法绑定(bind)sql

Question

我在以下查询中收到多部分无法绑定(bind)错误

update nfltx
set 
b.boxno = a.boxno,
b.message = a.message,
b.nameboxno = a.nameboxno,
b.namemsg = a.namemsg,
b.phoneboxno = a.phoneboxno,
b.phonemsg = a.phonemsg

FROM ofltx a JOIN nfltx b 
ON a.ls_fullnam = b.ls_fullnam

但是如果我从框中删除 b 则没有消息，并且我不会收到错误。这背后的原因是什么。感谢您使用 sql server 2008

Answer 1

FROM 子句中指定的表别名不能用作 SET column_name 中的限定符。这是无效的:

update nfltx
set 
b.boxno = a.boxno,
b.message = a.message,
b.nameboxno = a.nameboxno,
b.namemsg = a.namemsg,
b.phoneboxno = a.phoneboxno,
b.phonemsg = a.phonemsg

FROM ofltx a JOIN nfltx b 
ON a.ls_fullnam = b.ls_fullnam

要使其正常工作，请删除 b。列名的别名。

update nfltx
set 
boxno = a.boxno,
message = a.message,
nameboxno = a.nameboxno,
namemsg = a.namemsg,
phoneboxno = a.phoneboxno,
phonemsg = a.phonemsg

FROM ofltx a JOIN nfltx b 
ON a.ls_fullnam = b.ls_fullnam

拉吉