I am having following scenario
Drop Table #Temp
Create Table #Temp(name1 text, name2 text)
Insert INTO #Temp Values ('test','test')
Insert INTO #Temp Values ('test','test')
Insert Into #Temp1 Select * From
(
;With CTE as (
Select * from #Temp
)
select * from CTE
)
I know we can't use CTE as subquery .. but for hard time I don't know exact syntax of subquery since it is being provided by other system.
just image this
Insert Into #Temp1 Select * From
(
"Query Provided by Other System"
)
So I don't have any control on subquery ("Query Provided by Other System").. And I have also tried dynamic sql query like
Declare #subquery nvarchar(max)
set #subquery=';With CTE2 as ( Select * from #Temp) select * from CTE2'
INSERT INTO #Temp1 From (EXEC sp_executesql #subquery)
This also gives error...
More Things to know:
i)I don't know about what are the columns will sub query returns
ii)And I don't have any control in sub query . like what is syntax of subquery and how it looks like?
so from these things, even I can't use dynamic sql (EXEC sp_executesql).because I don't know what will happen if #subquery itself contains dynamic sql.
Please help anyone...
Use like this, with dynamic sql. It will work...
Insert Into #Temp1
EXEC sp_executesql #subquery
You can use the below syntax
;With CTE as (
Select * from #Temp
)
Insert Into #Temp1
Select *
From (
select * from CTE
) t
or if you don't have already created the #Temp1 table, use below code. It will automatically create the #temp1 table according to the selected fields
;With CTE as (
Select * from #Temp
)
Select *
Into #Temp1
From (
select * from CTE
) t
Besides syntax, you can simplify above SQL code as follows
;With CTE as (
Select * from #Temp
)
Insert Into #Temp1
Select *
From CTE
or better
Insert Into #Temp1
Select * from #Temp
Related
My problem is using a table variable in a exec.
declare #sort_col nvarchar(1000) = 'itm_id'
declare #sort_dir nvarchar(4) = 'desc'
declare #filters nvarchar(1000) = ' and itm_name like ''%aa%'''
declare #temp table
(
itm_id int
)
insert into #temp
EXEC('select itm_id from Tblitm where itm_name not like ''%aa%''')
EXEC('select * from (select (ROW_NUMBER() OVER (ORDER BY '+#sort_col+' '+#sort_dir+')) row_num, * FROM (select itm_id, itm_name,
dbo.fnItmsHistory(itm_id) itm_history
from dbo.Tblitm as itm
left outer join '+#temp+' as temp on itm.itm_id = temp.itm_id
where itm_id=itm_id and temp.itm_id = null '+#filters+') as x) as tmp')
It says Must declare the scalar variable "#temp" when the temp table is declared i tried using original temp table and it worked, but i had problems when trying to update my entity model.So is there any solution for this problem?
Note:
I must use exec because in filters i store string for the where clause.
Try moving the table variable inside the dynamic statement.
EXEC('
declare #temp table
(
itm_id int
)
insert into #temp
select itm_id from Tblitm where itm_name not like ''%aa%''
select * from (select (ROW_NUMBER() OVER (ORDER BY '+#sort_col+' '+#sort_dir+')) row_num, * FROM (select itm_id, itm_name,
dbo.fnItmsHistory(itm_id) itm_history
from dbo.Tblitm as itm
left outer join #temp as temp on itm.itm_id = temp.itm_id
where itm_id=itm_id and temp.itm_id = null '+#filters+') as x) as tmp')
For solution i had to use a temp table and then on the start of my stored procedure i used the if condition from the EF can't infer return schema from Stored Procedure selecting from a #temp table anwser.
It's the best solution for this scenario i think.
Is there any way to delete all the rows in a table except one (random) row, without specifying any column names in the DELETE statement?
I'm trying to do something like this:
CREATE TABLE [dbo].[DeleteExceptTop1]([Id] INT)
INSERT [dbo].[DeleteExceptTop1] SELECT 1
INSERT [dbo].[DeleteExceptTop1] SELECT 2
INSERT [dbo].[DeleteExceptTop1] SELECT 3
SELECT * FROM [dbo].[DeleteExceptTop1]
DELETE
FROM [dbo].[DeleteExceptTop1]
EXCEPT
SELECT TOP 1 * FROM [dbo].[DeleteExceptTop1]
SELECT * FROM [dbo].[DeleteExceptTop1]
The final SELECT should yield one row (could be any of the three).
;WITH CTE AS
(
SELECT ROW_NUMBER() OVER (ORDER BY (SELECT newid())) AS RN
FROM [dbo].[DeleteExceptTop1]
)
DELETE FROM CTE
WHERE RN > 1
Or similar to #abatishchev's answer but with more variety in the ordering and avoiding deprecated constructs.
DECLARE #C INT
SELECT #C = COUNT(*) - 1
FROM [dbo].[DeleteExceptTop1]
IF #c > 0
BEGIN
WITH CTE AS
(
SELECT TOP(#C) *
FROM [dbo].[DeleteExceptTop1]
ORDER BY NEWID()
)
DELETE FROM CTE;
END
Or a final way that uses EXCEPT and assumes no duplicate rows and that all columns are of datatypes compatible with the EXCEPT operator
/*Materialise TOP 1 to ensure only evaluated once*/
SELECT TOP(1) *
INTO #T
FROM [dbo].[DeleteExceptTop1]
ORDER BY NEWID()
;WITH CTE AS
(
SELECT *
FROM [dbo].[DeleteExceptTop1] T1
WHERE EXISTS(
SELECT *
FROM #T
EXCEPT
SELECT T1.*)
)
DELETE FROM CTE;
DROP TABLE #T
Try:
declare #c int
select #c = count(*) - 1 from [dbo].[DeleteExceptTop1]
IF #c > 0
BEGIN
set RowCount #c
delete from [dbo].[DeleteExceptTop1]
END
No.
You need to use a column name (such as that of the primary key) to identify which rows you want to remove.
"random row" has no meaning in SQL except its data. If you want to delete everything except some row, you must differentiate that row from the others you with to DELETE
EXCEPT works by comparing the DISTINCT values in the row.
EDIT: If you can specify the primary key then this is a trivial matter. You can simply DELETE where the PK <> your "random" selection or NOT IN your "random" selection(s).
EDIT: Apparently I'm wrong about the need to specify any column name, you can do it using the assigned ROW_NUMBER.. But I'm not going to delete my answer because it references your use of EXCEPT which was discussed in the comments. You cannot do it without deriving some column name like that from ROW_NUMBER
You could do something like this (SQL 2008)
DECLARE #Original TABLE ([Id] INT)
INSERT INTO #Original(ID) VALUES(1)
INSERT INTO #Original(ID) VALUES(2)
INSERT INTO #Original(ID) VALUES(3)
SELECT * FROM #Original;
WITH CTE AS
(SELECT ROW_NUMBER() OVER(ORDER BY ID) AS ROW, ID FROM #Original)
DELETE #Original
FROM #Original O
INNER JOIN CTE ON O.ID = CTE.ROW
WHERE ROW > 1
SELECT * FROM #Original
It seems like the simplest answer may be the best. The following should work:
Declare #count int
Set #count=(Select count(*) from DeleteExceptTop1)-1
Delete top (#count) from DeleteExceptTop1
I know it has been answered but what about?
DELETE
FROM [dbo].[DeleteExceptTop1]
Where Id not in (
SELECT TOP 1 * FROM [dbo].[DeleteExceptTop1])
i want use select statement on the a table and inserting result into a temp table variable, but i don't declare temp table with columns and i want use like this:
Declare #tmp table;
SELECT * INTO #tmp FROM myTable
this want declare columns and data types for #tmp
please help me
You can do this simply without the DECLARE command - which is not valid for #temp tables anyway, only #table variables. Did you try just the following without trying to define #tmp first:
SELECT * INTO #tmp FROM myTable;
With data:
select *
into #tmp
from myTable
No data:
select *
into #tmp
from myTable
where 0=1
BTW, you can not do this with table variables.
select *
into #tmp
from myTable
Table variables need to be declared with the columns.
How do I get the row number in an SQL query using SQL Server 2000, where the ROW_NUMBER() function is not supported?
You can always try to use a temp table with an identity column
DECLARE #table TABLE(
[id] INT IDENTITY(1,1),
Val VARCHAR(10)
)
DECLARE #TableFrom TABLE(
Val VARCHAR(10)
)
INSERT INTO #TableFrom (Val) SELECT 'A'
INSERT INTO #TableFrom (Val) SELECT 'B'
INSERT INTO #TableFrom (Val) SELECT 'C'
INSERT INTO #TableFrom (Val) SELECT 'D'
INSERT INTO #table (Val) SELECT * FROM #TableFrom ORDER BY Val DESC
SELECT * FROM #table
Some of the best paging i have seen in Sql Server 2000 uses this pattern
DECLARE #PageStart INT,
#PageEnd INT
SELECT #PageStart = 51,
#PageEnd = 100
SELECT <TABLE>.*
FROM (
SELECT TOP (#PageStart - 1)
<ID>
FROM (
SELECT TOP (#PageEnd)
<ID>
FROM TABLE
ORDER BY <ID> ASC
) SUB
ORDER BY SUB.<ID> DESC
) SUB INNER JOIN
<TABLE> ON SUB.<ID> = <TABLE>.<ID>
ORDER BY SUB.<ID>
Another way to create a temp table with an identity to use:
SELECT Field1, Field2, IDENTITY(int, 1,1) AS MyID
INTO #Temp
FROM Table1
http://social.msdn.microsoft.com/Forums/en-US/transactsql/thread/13daeb85-da43-4166-b188-595a4a5d5282
You can't use Row_Number() in Sql Server 2000 - it was introduced in 2005.
In case you wanted to use Row_Number for paging, here are some ideas on how to perform efficient paging in Sql 2000:
Efficiently Paging Through Large Result Sets in SQL Server 2000
A More Efficient Method for Paging Through Large Result Sets
Another way of doing this without using a SQL defined function could be the following:
SELECT
(SELECT COUNT(1) + 1 FROM YourTable t2 WHERE t2.Id < t.Id) AS RowNumber
FROM YourTable t
It's a bit tricky, but seems simpler that the options that others gave you.
Could you elaborate how the below query will solve the problem?
SELECT ( SELECT SUM(1)
FROM specimen_source_ref
WHERE specimen_source_rcd <= reg.specimen_source_rcd
) AS 'Row Number'
,*
FROM
specimen_source_ref reg
Last night I was writing a simple T-SQL program something like this
DECLARE #ROLEID AS INT
SELECT #ROLEID = [ROLE ID] FROM TBLROLE
;WITH CTE
AS
(
SELECT * FROM SOMETABLE
)
IF (#ROLEID = 1)
BEGIN
//SOMECODE
END
ELSE IF(#ROLEID = 2)
BEGIN
//SOMECODE
END
ELSE
BEGIN
//SOMECODE
END
I found after compilation that it is throwing error something like "Incorrect statement near if"
What is wrong?
However, I did that by using some other way. But I wanted to know why it did not work!
Common table expressions are defined within the context of a single statement:
WITH cte_name AS (
<cte definition>)
<statement that uses cte>;
So you can do something like:
WITH CTE
AS
(
SELECT * FROM SOMETABLE
)
SELECT * FROM CTE;
or
WITH CTE
AS
(
SELECT * FROM SOMETABLE
)
UPDATE CTE
SET somefield = somevalue
WHERE id = somekey;
A CTE must be followed by a single
SELECT, INSERT, UPDATE, MERGE, or
DELETE statement that references some
or all the CTE columns. A CTE can also
be specified in a CREATE VIEW
statement as part of the defining
SELECT statement of the view
A little late but I can't be the only one bumping into this.
A solution could be to create a temporary table like this:
-- If previous run of this query fails, the temp table will be deleted.
-- Selecting into creates the temp table which fails if it already exists
IF EXISTS(SELECT [name] FROM tempdb.sys.tables WHERE [name] like '#dtBalansOpgesteldGefilterd%') BEGIN
DROP TABLE #temp
END;
;WITH CTE
AS
(
SELECT * FROM SOMETABLE
)
-- Followed by select statement as required
SELECT *
INTO #temp
FROM CTE
IF #awsome = 1
BEGIN
SELECT 'WHATEVERYOUWANT' AS WhateverColumnNameYouWant, *
FROM #temp
END
The closest you'll get is using a UNION ALL to do a crude switched select:
DECLARE #ROLEID AS INT
SELECT #ROLEID = [ROLE ID] FROM TBLROLE
;WITH CTE
AS
(
SELECT * FROM SOMETABLE
)
SELECT
--somecolumns
FROM
CTE
--other stuff too
WHERE
#ROLEID = 1
UNION ALL
SELECT
--somecolumns
FROM
CTE
--other stuff too
WHERE
#ROLEID = 2
UNION ALL
SELECT
--somecolumns
FROM
CTE
--other stuff too
WHERE
#ROLEID = 3
...
UNION ALL
SELECT
--somecolumns
FROM
CTE
--other stuff too
WHERE
#ROLEID = n
Try putting the CTE in the IF. It worked for me.
IF #awsome = 1
BEGIN
;WITH CTE
AS
(
SELECT * FROM SOMETABLE
)
SELECT 'WHATEVERYOUWANT' FROM CTE
END
ELSE IF #awesome = 2
BEGIN
;WITH CTE2
AS
(
SELECT * FROM SOMETABLE
)
SELECT 'WHATEVERYOUWANT' FROM CTE2
END