select 表达式1 as A , 表达式2 as B , 表达式3 as C from (select 表达式4 from t1 where 条件X)
select 表达式5 as A , 表达式6 as B , 表达式7 as C from (select 表达式8 from t1 where 条件Y)
………
都从表t1中查询
这样的N条语句如何合并成一个语句
输出结果依次排列
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如何合并多条SQL语句
select 表达式1 as A , 表达式2 as B , 表达式3 as C from (select 表达式4 from t1 where 条件X) select 表达式5 as A , 表达式6 as B , 表达式7 as C from (select 表达式8 from t1 where 条件Y) ……… 都从表t1中查询 这样的N条语句如何合并成一个语句 输出结果依次排列