MS SQL的BUG?
直接上代码:

SQL code

 IF 1=2    begin        SELECT * INTO #t FROM t1        DROP TABLE #t    endIF 1=3     begin        SELECT * INTO #t FROM t1        DROP TABLE #t    end

我认为上面的代码是没问题的.可是MS SQL2005/2008总是报错,数据库中已存在名为 '#t' 的对象。
你说这是不是BUG?
凭啥不让我创建两次#t!

[解决办法]
当然会报错，在同一会话时检查语句通不过

这样改,把if放在where条件处

SELECT * INTO #t FROM t1 where 1=2
union all
select * from t1 where 1=3

或创建临时表接收

SQL code

create table #T(col.....)if ..insert into #T...else if insert into #T ...
[解决办法]
 String sql = "insert into stu values(" + id + "," + name + "," + sex + "," + age + "," + weight + ")";
这句话有错吗
[解决办法]
探讨

String sql = "insert into stu values(" + id + "," + name + "," + sex + "," + age + "," + weight + ")";
这句话有错吗

[解决办法]
当两个表结构很不一样的时候,用动态SQL完成,
SQL code
declare @sql varchar(2000)IF 1=2begin  select @sql='SELECT * INTO #t FROM '+'t1'+';DROP TABLE #t'endIF 1=3begin  select @sql='SELECT * INTO #t FROM '+'t1'+';DROP TABLE #t'endexec(@sql)