sql - 在 1 个 SQL 语句中组合更新查询

Question

我正在尝试将两个更新查询组合成一个 sql 语句。我以为我可以使用联合查询来组合查询，但我做不到。有什么建议吗？我要组合的查询如下：

UPDATE PromotionDatabase
  SET PromotionDatabase.PromotionWeekEndingSunday = [PromotionDatabase]![Start Date]+-(Weekday([PromotionDatabase]![Start Date])-1)+7 

UPDATE PromotionDatabase
  SET PromotionDatabase.PromotionEndingWeekEndingSunday = [PromotionDatabase]![End Date]+-(Weekday([PromotionDatabase]![End Date])-1)+7;

Answer 1

您是否只是想在同一个 UPDATE 语句中更新 2 个字段：

UPDATE PromotionDatabase
SET PromotionWeekEndingSunday = [Start Date]+-(Weekday([Start Date])-1)+7,
   PromotionEndingWeekEndingSunday = [End Date]+-(Weekday([End Date])-1)+7;

Answer 2

更新的语法如下。见w3schools

UPDATE table_name
SET column1=value, column2=value2,...
WHERE some_column=some_value