I want to use a parameter value as a part of query, like this:
SELECT * FROM SOME_TABLE WHERE #PARAM
Where #PARAM = "ID = 1"
Is this even possible?
Declare #query Varchar(max)
Set #query = 'SELECT * FROM table WHERE ' + #parameter
exec(#query)
i dont remember syntex but u can do something like this.
Yes it is, you just need to use dynamic SQL:
http://www.codeproject.com/Articles/20815/Building-Dynamic-SQL-In-a-Stored-Procedure
DECLARE #SQLQuery AS NVARCHAR(500)
SET #SQLQuery = 'SELECT * FROM table WHERE ' + #PARAMS
EXECUTE sp_executesql #SQLQuery
dynamic SQL has some downfalls that you should be aware of, if you wanna use it, read this article for more details:
http://www.sommarskog.se/dynamic_sql.html
The other answers appear to be more-or-less correct, but here's a complete example that you can try yourself:
/* We'll want two different variables--one
for the query as a whole, one for the
parameter.
*/
DECLARE #sSql VARCHAR(MAX),
#sParm VARCHAR(MAX);
----------------------------------------------------
/* Build a temp table for demonstration ... */
IF OBJECT_ID('tempdb..#table') IS NOT NULL BEGIN
DROP TABLE #table
END
CREATE TABLE #table (
[Id] INT IDENTITY PRIMARY KEY,
[Name] VARCHAR(100),
[Value] INT
)
INSERT INTO #table (Name, Value) VALUES ('Test1', 1)
INSERT INTO #table (Name, Value) VALUES ('Test2', 2)
----------------------------------------------------
/* Our complete query is some base plus the input
parameter
*/
SELECT #sParm = 'Id = 1';
SELECT #sSql =
'SELECT
t.[Name],
t.[Value]
FROM #table t WITH (NOLOCK)
WHERE ' + #sParm + ''
EXEC(#sSQL)
Related
I have a column in table which has multiple values separated by space.
i want to return those rows which has any of the matching values from search string.
Eg:
search string= 'mumbai pune'
This need to return rows matching word 'mumbai' or 'pune' or matching both
Declare #str nvarchar(500)
SET #str='mumbai pune'
create table #tmp
(
ID int identity(1,1),
citycsv nvarchar(500)
)
insert into #tmp(citycsv)Values
('mumbai pune'),
('mumbai'),
('nagpur')
select *from #tmp t
select *from #tmp t
where t.citycsv like '%'+#str+'%'
drop table #tmp
Required Out put:
ID CityCSV
1 mumbai pune
2 mumbai
You can use a splitter function to split your search string out as a table contain the desired search keys. Then you can join your main table with the table containing the search key using the LIKE statement.
For completeness I have included an example of a string splitter function, however there are plenty of example here on SO.
Example string splitter function:
CREATE FUNCTION [dbo].[SplitString]
(
#string NVARCHAR(MAX),
#delimiter CHAR(1)
)
RETURNS #output TABLE(splitdata NVARCHAR(MAX)
)
BEGIN
DECLARE #start INT, #end INT
SELECT #start = 1, #end = CHARINDEX(#delimiter, #string)
WHILE #start < LEN(#string) + 1 BEGIN
IF #end = 0
SET #end = LEN(#string) + 1
INSERT INTO #output (splitdata)
VALUES(SUBSTRING(#string, #start, #end - #start))
SET #start = #end + 1
SET #end = CHARINDEX(#delimiter, #string, #start)
END
RETURN
END
The following query demonstrates how the string splitter function can be combined with regular expressions to get the desired result:
SELECT DISTINCT
C.ID
,C.citycsv
FROM #tmp C
INNER JOIN (
SELECT splitdata + '[ ]%' AS MatchFirstWord -- Search pattern to match the first word in the string with the target search word.
,'%[ ]' + splitdata AS MatchLastWord -- Search pattern to match the last word in the string with the target search word.
,'%[ ]' + splitdata + '[ ]%' AS MatchMiddle -- Search pattern to match any words in the middle of the string with the target search word.
,splitdata AS MatchExact -- Search pattern for exact match.
FROM dbo.SplitString(#str, ' ')
) M ON (
(C.citycsv LIKE M.MatchFirstWord) OR
(C.citycsv LIKE M.MatchLastWord) OR
(C.citycsv LIKE M.MatchMiddle) OR
(C.citycsv LIKE M.MatchExact)
)
ORDER BY C.ID
Another approach , by using ReplaceFunction
Its syntax as following:
REPLACE ( string_expression , string_pattern , string_replacement )
so we could reach the target via replacing the every space that separated the values with the next pattern
'%'' OR t.citycsv like ''%'
An example:
Declare #str nvarchar(500),
#Where nvarchar (1000),
#Query nvarchar (4000)
SET #str='mumbai pune'
create table #tmp
(
ID int identity(1,1),
citycsv nvarchar(500)
)
insert into #tmp(citycsv)Values
('mumbai pune'),
('mumbai'),
('nagpur')
select * from #tmp t
Set #Where = 'where t.citycsv like ' + '''%'+ replace (RTRIM(LTRIM(#str)), ' ', '%'' OR t.citycsv like ''%') +'%'''
Set #Query = 'select * from #tmp t ' + #Where
execute sp_executesql #Query
drop table #tmp
The Result:
I had defined a variable Test which is #[User::Test] with string value "abc".
My question is can I set the sql command that update my table where my column value = my variable ?
example.
update tableA set ValueB = '1pm' where ValueA = '" + #[User::Test] + "'
But this is not working for me. How to solve it ?
You have to use a question mark in the SQL text and bind the variable using the query configuration (IIRC, it was the Parameter Mapping tab). For example, I used to do stuff like this:
-- declare vars
declare #table varchar(256);
declare #sql varchar(max);
-- get the table as a parameter
set #table = ?;
-- drop the table if it already exists
if (object_id(#table) is not null) begin;
set #sql = 'drop table '+#table+';';
exec(#sql);
end;
-- create the table
set #sql = '
create table '+#table+' (
IPID int,
...
_rn int
);
';
exec(#sql);
Here, I found a screenshot in Google: https://www.simple-talk.com/iwritefor/articlefiles/1455-SsisVariables_Fig11-620x524.jpg
I have a stored procedure
create PROCEDURE [dbo].[SP]
(
#OrderList varchar(500)
)
AS
Begin
select *
from table
where id in ('+ #OrderList +')
Here I am passing orderlist....
When I execute like this
exec sp 'iss005,iss006'
I am not getting data
but when I hardcode in sp like this ...
select * from table where id in ('iss005','iss006')
then am getting data...
Thank you
Unfortunately it won't work that way. If you change your procedure to something like the following, this will work:
Create Procedure dbo.SP
#OrderList varchar(500)
AS
Declare #SQL VarChar(1000)
Select #SQL = 'SELECT * FROM table '
Select #SQL = #SQL + 'WHERE id in (' + #OrderList +')'
Exec ( #SQL)
GO
Looking more into your query, your ID's value varchar, so the procedure will fail as you'll still be getting :
WHERE id in (iss005,iss006)
when you want :
WHERE id in ('iss005','iss006')
You would need to either pass in the quote values, e.g. :
#OrderList = 'iss005','iss006'
Or work out some SQL to split the #OrderList by comma and use the QUOTENAME() function to add the quotes to the new variable.
I strongly recommend in this case the use of XML parameters, will give you a lot of flexibility.
Your XML might be something like
<ids>
<id>iss006</id>
<id>iss005</id>
</ids>
Your procedure should be something like this:
create PROCEDURE [dbo].[SP]
(
#OrderList XML
)
AS
Begin
select * from table
where id in (
select ParamValues.ID.value('.','VARCHAR(50)')
FROM #OrderList.nodes('/ids/id') as ParamValues(id)
)
Besides the use of store procedures outputs I also would recommend the use of functions but that is up to you.
Regards.
I had the same kind of requirement. i was getting list of user in a int list variable and i need to get all the order of those user. I have use a very simple trick which had solve my issue. please find the code.
public DataTable GetAllOrderData(List<int> UserID)
{
try
{
string listofuser = String.Join(",", UserID.ToArray());
SqlParameter[] parameters = new SqlParameter[]
{
new SqlParameter("#USERID", listofuser)
};
return SqlDBHelper.ExecuteParamerizedSelectCommand("GetOrderByUserID", System.Data.CommandType.StoredProcedure, parameters);
}
finally { UserID = null; }
}
And this is the stored procedure
CREATE PROCEDURE [dbo].[GetOrderByUserID] (#USERID varchar(700))
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
Declare #SQL VarChar(1000)
Select #SQL = 'SELECT *,ORM.OrganisationName FROM OrderTransaction ORT LEFT JOIN OrganisationMaster ORM ON (ORT.OrganisationID=ORM.OrganisationID) '
Select #SQL = #SQL + 'WHERE ORT.CreatedBy IN (' + #USERID +')'
Exec ( #SQL)
END
This query runs, but it produces the name of a table as a result, rather than actually selecting from that table.
SELECT T.*
FROM (SELECT tablename
FROM ListOfTables
WHERE id = 0) AS T
where ListOfTables contains id=0, tablename='some_table', I want to return the same result set as if I had written this directly:
SELECT * FROM some_table
Is there a native way to do this in MySQL 5, or do I have to do in in the application?
To do this in MySQL, you need to create a prepared statement which you can only create from a user variable:
SELECT #tn := tablename FROM ListOfTables WHERE id = 0;
SET #qs = CONCAT('SELECT * FROM ', #tn);
PREPARE ps FROM #qs;
EXECUTE ps;
You need to use dynamic SQL to get this result (the below code assumes SQL Server, I can't speak for other RDBMS').
declare #tableName varchar(100)
declare #query varchar(500)
select #tableName = tablename
from ListOfTables
where id = 0
select #query = 'select * from ' + #tableName
exec (#query)
Almost the same as #Shark's answer, except you also quote the name of the table to avoid syntax errors.
-- Using variables just for better readability.
DECLARE #Name NVARCHAR(4000)
DECLARE #Query NVARCHAR(4000)
-- Get the relevant data
SET #Name = QUOTENAME(SELECT tablename FROM ListOfTables WHERE id=0)
-- Build query
SET #Query = 'SELECT * FROM ' + #Schema + '.' + #Name + ''
-- execute it.
EXEC(#Query)
I have a variable table:
DECLARE #A_Table TABLE(ID INT, att1 VARCHAR(100), att2 nvarchar(200))
I want to make dynamic sql, so I insert into this table some data (all inside a loop):
WHILE (#i <= 100) BEGIN
SELECT #other_att = NAME FROM #other_Table where ID = #i;
SET #sql = 'INSERT ' + #A_Table+ '(ID,att1,att2) SELECT '+CAST(#i AS VARCHAR)+' , '''+ #other_att+''', SUM('+ #other_att') FROM '+ #EVEN_OTHER_Table;
EXEC (#sql);
END
sql every time would look like:
INSERT INTO #A_Table SELECT 1 , 'subject', SUM(subject)
INSERT INTO #A_Table SELECT 2 , 'age', SUM(age)
INSERT INTO #A_Table SELECT 3 , 'sex', SUM(sex)....
AND after executing this :
SO I will get:
#A_Table:
id att1 att2
1 subject 4.3
2 age 4.5
3 sex 4.1
but I get an error:
Msg 137, Level 16, State 1, Line 48
Must declare the scalar variable "#A_Table".
SO what is it the syntax to insert dynamically into a variable table?
Ok I have understood it.
You could use the INSERT ... EXEC syntax to insert the data returned by the dynamic SELECT. Of course, you would then need to remove the INSERT part from the dynamic statement.
WHILE (#i <= 100) BEGIN
SELECT #other_att = NAME FROM #other_Table where ID = #i;
SET #sql = 'SELECT '+CAST(#i AS VARCHAR)+' , ''' + #other_att+''', SUM('+ #other_att + ') FROM '+ #EVEN_OTHER_Table;
INSERT INTO #A_Table (ID,att1,att2)
EXEC (#sql);
END
You have a table variable, not a variable that contains the table name.
So you would need the following.
WHILE (#i <= 100) BEGIN
SELECT #other_att = NAME FROM #other_Table where ID = #i;
SET #sql = 'INSERT INTO #A_Table (ID,att1,att2) SELECT '+CAST(#i AS VARCHAR)+' , '''+ #other_att+''', SUM('+ #other_att') FROM #EVEN_OTHER_Table';
EXEC (#sql);
END
You would also need to declare the table variable as a statement inside the #sql variable, and execute your declare table and inserts together, or use a local/global temporary table.
With a local temporary table (stored in the tempdb) you could do something like this.
CREATE TABLE #testtbl (ID INT);
EXEC ('INSERT INTO #testtbl VALUES (1)');
SELECT * FROM #testtbl
DROP TABLE #testtbl
Some good info about temporary tables in BOL
http://msdn.microsoft.com/en-us/library/ms174979.aspx - quite far down the page
And the table type.
http://msdn.microsoft.com/en-us/library/ms175010.aspx
Your EXEC statement occurs in a different context and is therefore unaware of any variables created in your original context.
To create dynamic insert query it is really a task, I also struggle to find it ,finally I have tried in the following way and it's successfully working. Please find the code below.
CREATE PROCEDURE [dbo].[InsertTodaysData] (#tbl varchar(50),#Days int,
#MDate varchar(50), #EValue varchar(50), #Speed varchar(50),
#Totalreturn varchar(50),#Closingv varchar(50), #TotalReturnV varchar(50))
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE #SQLQuery varchar(2000)
-- Insert statements for procedure here
set #SQLQuery = 'INSERT INTO '+#tbl+' (ID,MDate,EValue,Speed,TotalReturnRatio,ClosingValue,
TotalReturnValue) VALUES ('+#Days+','''+#MDate+''', '+#EValue+', '+#Speed+',
'+#Totalreturn+', '+#Closingv+', '+#TotalReturnV+')'
EXECUTE(#SQLQuery)
END
Hope this will help you..