Question

您好我试图每天用新表更新MASTER TABLE，表名不同，每日例[Collections_LT5_PH7_20160117]，[Collections_LT5_PH7_20160118]等。到目前为止，这是我的更新查询。

INSERT INTO [Collections_LT5_PH7_Master]
(
Date_ID, 
Record_Num,
SITE_ID,
ACCT_NUM,
PHONE_NUM,
Dial_Count,
Call1_Phone,
Call1_dt,
Disp1_Id,
Call2_Phone,
Call2_dt,
Disp2_Id,
Phone1TimeZoneId
)
SELECT
CONVERT(VARCHAR, DATEADD(dd, -1, GETDATE()), 112) as Data_ID,
Record_Num,
SITE_ID,
ACCT_NUM,
PHONE_NUM,
Dial_Count,
Call1_Phone,
Call1_dt,
Disp1_Id,
Call2_Phone,
Call2_dt,
Disp2_Id,
Phone1TimeZoneId,

FROM [Collections_LT5_PH7_20160118]

我想更新，而不必手动更改数据从前一天拉出的表中的日期。我试过了

FROM '[Collections_LT5_PH7_'+CONVERT(VARCHAR, DATEADD(dd, -1, GETDATE()), 112)+']'

但它出错了。

任何想法？

Answer 1

你几乎就在那里

尝试这个曾经对查询感到满意，取消执行部分：

DECLARE @SQL VARCHAR(MAX) = 'INSERT INTO [Collections_LT5_PH7_Master]
(
Date_ID, 
Record_Num,
SITE_ID,
ACCT_NUM,
PHONE_NUM,
Dial_Count,
Call1_Phone,
Call1_dt,
Disp1_Id,
Call2_Phone,
Call2_dt,
Disp2_Id,
Phone1TimeZoneId
)
SELECT
CONVERT(VARCHAR, DATEADD(dd, -1, GETDATE()), 112) as Data_ID,
Record_Num,
SITE_ID,
ACCT_NUM,
PHONE_NUM,
Dial_Count,
Call1_Phone,
Call1_dt,
Disp1_Id,
Call2_Phone,
Call2_dt,
Disp2_Id,
Phone1TimeZoneId

FROM [Collections_LT5_PH7_'+CONVERT(VARCHAR, DATEADD(dd, -1, GETDATE()), 112)+']'

PRINT (@SQL)
--EXECUTE (@SQL);

Answer 2

您不能动态地将表名设置为SQL查询，我猜这是一个安全功能。

您可以使用预准备语句和“EXECUTE”命令来解决它。以下在MySQL中工作，显然你需要修改查询字符串和填充的表名到你想要的那个。

set @tablename := 'test';
set @q := 'select * from ';
select concat(@q,@tablename) into @s;
prepare stmt from @s;
execute stmt;

如何从每日命名不同的表中自动提取数据

2 个答案: