如何将多个select语句插入临时表

Question

我有三个具有不同数据的表,我需要插入一个TEMP表并在StoredProcedure中返回该表.

我试过:

-- To get last 10 Days Letters count
SELECT col1,col2,1 AS Type, LettersCount
INTO #temp FROM tblData

-- To get last 4 weeks Letters count
SELECT col1,col2,2 AS Type, LettersCount
INTO #temp FROM tblData

-- To get month wise Letters count
SELECT col1,col2,3 AS Type, LettersCount
INTO #temp FROM tblData

显示错误为

Msg 2714, Level 16, State 1, Line 16
There is already an object named '#temp ' in the database.
Msg 102, Level 15, State 1, Line 24
Incorrect syntax near 'T'.
Msg 2714, Level 16, State 1, Line 32
There is already an object named '#temp ' in the database.

Answer 1

您可以检查它是否已存在

IF OBJECT_ID ('tempdb..#TempLetters') is not null
drop table #TempLetters


SELECT col1,col2,1 AS Type, LettersCount
INTO #TempLetters FROM tblData

-- To get last 4 weeks Letters count
INSERT INTO #TempLetters
SELECT col1,col2,2 AS Type, LettersCount
FROM tblData

-- To get month wise Letters count
INSERT INTO #TempLetters
SELECT col1,col2,3 AS Type, LettersCount
FROM tblData

Answer 2

该SELECT INTO语句还可用于使用另一个不应存在​​的select * into tablename from ..此处tablename表的架构创建一个新的空表 。

像这样改变你的插入：

SELECT col1,
       col2,
       1 AS Type,
       LettersCount
INTO   #temp
FROM   tblData

-- To get last 4 weeks Letters count
INSERT INTO #temp
SELECT col1,col2,2 AS Type,LettersCount
FROM   tblData

-- To get month wise Letters count
INSERT INTO #temp
SELECT col1,col2,3 AS Type,LettersCount
FROM   tblData 

Answer 3

创建临时表一次，然后为其他两个 SELECT 语句插入其中：

SELECT col1, col2, 1 AS Type, LettersCount
  INTO #temp
  FROM tblData;

INSERT INTO #temp
    SELECT col1, col2, 2 AS Type, LettersCount
      FROM tblData;

INSERT INTO #temp
    SELECT col1, col2, 3 AS Type, LettersCount
      FROM tblData;