update 表名 set 字段=值 where 条件字段=值 and 字段=(select top 1 字段 from A where Q=1)
update A set W=9 where Q=1 and W=(select top 1 W from A where Q=1)
update 表名 set 字段=值 where 条件字段=值 and 字段=(select top 1 字段 from A where Q=1)
update A set W=9 where Q=1 and W=(select top 1 W from A where Q=1)
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