I need assign the following SQL Server's query result value to the variable called #value1
SELECT *
FROM customer
WHERE apo_id = '2589';
How can I do this in SQL Server?
1 - First declare your variable of type table.
declare #value1 table(
--YOUR TABLE DEFINITION ex: ValueId int,
)
2 - Insert into your variable
insert into #value1 select * from customer WHERE apo_id = '2589';
Hope that helps, thanks.
It won't really be a variable but a table because you are selecting multiple fields (e.g. Select *) but, you can select INTO a temporary table like this:
SELECT *
INTO #myTempTable
FROM customer
WHERE apo_id = '2589';
Related
This may be a very basic question, but I have been struggling with this.
I have a SSMS query that I'll be using multiple times for a large set of client Ids. Its quite cumbersome to have to amend the parameters in all the where clauses every time I want to run it.
For simplicity, I want to convert a query like the one below:
SELECT
ID,
Description
From TestDb
Where ID in ('1-234908','1-345678','1-12345')
to a query of the format below so that I only need to change my variable field once and it can be applied across my query:
USE TestDb
DECLARE #ixns NVARCHAR(100)
SET #ixns = '''1-234908'',''1-345678'',''1-12345'''
SELECT
ID,
Description
From TestDb
Where ID IN #ixns
However, the above format doesn't work. Can anyone help me on how I can use a varchar/string variable in my "where" clause for my query so that I can query multiple IDs at the same time and only have to adjust/set my variable once?
Thanks in advance :D
The most appropriate solution would be to use a table variable:
DECLARE #ixns TABLE (id NVARCHAR(100));
INSERT INTO #ixns(id) VALUES
('1-234908'),
('1-345678'),
('1-12345');
SELECT ID, Description
FROM TestDb
WHERE ID IN (SELECT id FROM #ixns);
You can load ids to temp table use that in where condition
USE TestDb
DECLARE #tmpIDs TABLE
(
id VARCHAR(50)
)
insert into #tmpIDs values ('1-234908')
insert into #tmpIDs values ('1-345678')
insert into #tmpIDs values ('1-12345')
SELECT
ID,
Description
From TestDb
Where ID IN (select id from #tmpIDs)
The most appropriate way is to create a table type because it is possible to pass this type as parameters.
1) Creating the table type with the ID column.
create type MyListID as table
(
Id int not null
)
go
2) Creating the procedure that receives this type as a parameter.
create procedure MyProcedure
(
#MyListID as MyListID readonly
)
as
select
column1,
column2
...
from
MyTable
where
Id in (select Id from #MyListID)
3) In this example you can see how to fill this type through your application ..: https://stackoverflow.com/a/25871046/8286724
I have a table variable with about 20 columns. I'd like to essentially reuse a single table variable structure for 2 different result sets. The 2 result sets should be represented in different table variables so I can't reuse a single table variable. Therefore, I was wondering if there was a way to clone a single table variable for reuse. For example, something like this:
DECLARE #MyTableVar1 TABLE(
Col1 INT,
Col2 INT
}
DECLARE #MyTableVar2 TABLE = #MyTableVar1
I'd like to avoid creating duplicate SQL if I can reuse existing SQL.
That is not possible, use temp table instead
if object_id('tempdb..#MyTempTable1') is not null drop table #MyTempTable1
Create TABLE #MyTempTable1 (
Col1 INT,
Col2 INT
)
if object_id('tempdb..#MyTempTable2') is not null drop table #MyTempTable2
select * into #MyTempTable2 from #MyTempTable1
update :
As suggested by Eric in comment, if you are looking for just table schema and not the data inside the first table then
select * into #MyTempTable2 from #MyTempTable1 where 1 = 0
You can create a user-defined table type which is typically meant for using table valued parameters for stored procedures. Once the type is created, you can use it as a type to declare any number of table variables just like built-in types. This comes closest to you requirement.
Ex:
CREATE TYPE MyTableType AS TABLE
( COL1 int
, COL2 int )
DECLARE #MyTableVar1 AS MyTableType
DECLARE #MyTableVar2 AS MyTableType
A few things to note with this solution
MyTableType becomes a database level type. It is not local to a specific stored procedure.
If you have to ever change the definition of the table, then you have to drop the code/sprocs using the TVP type, then recreate the table type with new definition and related sprocs. Typically this is a non-issue as the code and the type are created/recreated together.
You could use a temp table and select into... they perform better since their statistics are better.
create table #myTable(
Col1 INT null,
Col2 INT null
}
...
select *
into #myTableTwo
from #myTable
You can create one table variable and add type column in the table and use the type column in your queries to filter the data.
By this you are using one table to hold more than one type of data.
Hope this helps.
declare #myTable table(
Col1 INT null,
Col2 INT null,
....
Type INT NULL
}
insert into #myTable(...,type)
select ......,1
insert into #myTable(...,type)
select ......,2
select * from #myTable where type =1
select * from #myTable where type =2
I want to store values from a SELECT statement into a variable which is capable of holding more than one value because my SELECT statement returns multiple values of type INT. This is how my SP looks like so far.
ALTER PROCEDURE "ESG"."SP_ADD"
AS
BEGIN
DECLARE #Id table(identifiers VARCHAR);
INSERT INTO #Id (identifiers) VALUES('axaa1aaa-aaaa-a5aa-aaaa-aa8aaaa9aaaa');
INSERT INTO #Id (identifiers) VALUES('bxbb1bbb-bbbb-b5bb-bbb4-bb8bbbb9bbbf');
DECLARE #tranID INT = (SELECT
DOCUMENT_SET_.DOCUMENT_SET_TRANSACTION_ID
FROM DOCUMENT_SET_TRANSACTION
WHERE DOCUMENT_SET_TRANSACTION.IDENTIFIER IN (SELECT identifiers FROM #Id));
END
Variable #tranID should be a list or an array to hold the ids. Is it possible to do it SQL Server?
You can declare a variable of type table
DECLARE #tblTrans TABLE (
tranID INT
);
INSERT INTO #tblTrans
SELECT DOCUMENT_SET_TRANSACTION.DOCUMENT_SET_TRANSACTION_ID
FROM ESG.DOCUMENT_SET_TRANSACTION
WHERE DOCUMENT_SET_TRANSACTION.IDENTIFIER
IN (SELECT identifiers FROM #envelopeId);
Depending on what you want to do with the values after this, you could declare a cursor to loop through them or select straight from the variable.
You could also look into using a temporary table depending on what scope you need.
Try this, only take the firs row of example. Do u try this?
select DOCUMENT_SET_TRANSACTION.DOCUMENT_SET_TRANSACTION_ID,
(STUFF((SELECT '-' + convert(varchar(max),DOCUMENT_SET_TRANSACTION.DOCUMENT_SET_TRANSACTION_ID)
FROM ESG.DOCUMENT_SET_TRANSACTION
FOR XML PATH ('')), 1, 2, '')) AS example
FROM ESG.DOCUMENT_SET_TRANSACTION
I have a table including:
ID Name Period0Id Period1Id Period2Id
What I would like to receive data based on a user-defined parameter #check.
Lets assume:
declare #check int = 1;
In this case I need to get Period1Id value from the table. So I need to have something like that:
Select ID, Name, StatusId = Period + #check + Id -- #check is the parameter
From mytable
However, my query is not working. How can I fix this?
Your table looks like it is not in first normal form.
Instead of three columns for Period0Id to Period2Id you could have a column for PeriodIndex with values of (0,1,2) and a single column for PeriodId and then it would be just a WHERE PeriodIndex = #Check
You can't select a column using string interpolation with a variable as you are attempting. You can use dynamic SQL to create the SQL String dynamically. Or simply hardcode the options if they all have the same dataype.
Select ID,
Name,
StatusId = CASE #Check WHEN 0 THEN Period0Id
WHEN 1 THEN Period1Id
WHEN 2 THEN Period2Id
END
From mytable
Here is an alternative way that will create dynamic columns, which is essentially using your original query:
DECLARE #check VARCHAR = 1
DECLARE #sqlquery NVARCHAR(MAX)
SET #sqlquery = N'SELECT ID, Name, StatusId = Period'+#check+'Id
FROM mytable'
EXEC sp_executesql #sqlquery
Is there a way in T-SQL (SQL Server 2005) to assign a whole record to a record variable and then refer to the particular values using column names?
I mean, instead of:
select #var1 = col1,
#var2 = col2
from mytable
where ID = 1;
and referring to them as #var1 and #var2, something like
#record =
select col1, col2
from mytable
where ID = 1;
and referring to them like #record.col1 and #record.col2 .
I am beginner in t-sql, so hopefully the question is not too trivial.
You can create a table variable and select the whole resultset into it:
DECLARE #tt TABLE (col1 INT, col2 INT)
INSERT
INTO #tt
SELECT col1, col2
FROM mytable
WHERE id = 1
, but you cannot access its data except than in the SELECT query as well.
With pure TSQL (that it without custom datatypes) the thing you ask is impossible.
sounds like you are a programmer ... look at linq maybe as it does what you want.
You can use a temporary table and SELECT...INTO to avoid specifying the column names at the beginning :
SELECT Field1, Field2
INTO #TempTable
FROM MyTable
WHERE MyTable.MyID = 1
but of course you'll still need the FROM #TempTable part when referring to the column names.
SELECT Field1, Field2
FROM #TempTable
and of course to remember to drop the table at the end :
DROP #TempTable
The app code is where you'd normally refer to a single row at a time as a variable.
You could use XML, but you'd have to play with this...
DECLARE #MyRecord xml
DECLARE #Mytable TABLE (col1 int NOT NULL, col2 varchar(30) NOT NULL)
INSERT #Mytable (col1, col2) VALUES (1, 'bob')
select #MyRecord =
(SELECT *
from #Mytable
where col1 = 1
FOR XML AUTO)
SELECT #myRecord.value('./#col', 'int') --also #myRecord.value('#col', 'int')
--gives error
Msg 2390, Level 16, State 1, Line 12
XQuery [value()]: Top-level attribute nodes are not supported
Buried in the Transact SQL documentation I came across this restriction on variables:
Variables can be used only in expressions, not in place of object names or keywords.
Since you'd need to use an object name to qualify a column I don't believe that this is allowed.