asp.net - 将“and userName in('kuldeep')”分配给变量并添加到查询然后执行

Question

我有一些代码，例如：

declare @Condition nvarchar(50), --value  'and user_name in ('deep') 
select * from table where id = 10 

之后10我想放@Condition价值。如何分配和放置？

Answer 1

要将包含 SQL 的字符串用作查询的一部分，您需要该EXECUTE语句。

DECLARE @Condition NVARCHAR(50) = 'AND user_name IN (''deep'')';

EXECUTE( 'SELECT * FROM table WHERE id = 10 ' + @Condition );

Answer 2

使用SET @local_variable

SET { { @local_variable = expression } 
    | { @cursor_variable = { @cursor_variable | cursor_name 
            | { CURSOR [ FORWARD_ONLY | SCROLL ] 
                [ STATIC | KEYSET | DYNAMIC | FAST_FORWARD ] 
                [ READ_ONLY | SCROLL_LOCKS | OPTIMISTIC ] 
                [ TYPE_WARNING ] 
            FOR select_statement 
                [ FOR { READ ONLY | UPDATE [ OF column_name [ ,...n ] ] } 
                ] 
            } 
    } } 
}