I have a stored procedure which takes 'table name' as parameter. I want to store my 'exec' results to a variable and display using that variable.
Here is my T-SQL stored procedure..
create procedure DisplayTable( #tab varchar(30))
as
begin
Declare #Query VARCHAR(30)
set #Query='select * from ' +#tab
EXEC (#Query)
END
I want to do something like this..
SET #QueryResult = EXEC (#Query)
select #QueryResult
How do i achieve this.. Please help.. I am a beginner..
You can use XML for that. Just add e.g. "FOR XML AUTO" at the end of your SELECT. It's not tabular format, but at least it fulfills your requirement, and allows you to query and even update the result. XML support in SQL Server is very strong, just make yourself acquainted with the topic. You can start here: http://technet.microsoft.com/en-us/library/ms178107.aspx
alter procedure DisplayTable(
#tab varchar(30)
,#query varchar(max) output
)
as
BEGIN
Declare #execution varchar(max) = 'select * from ' +#tab
declare #tempStructure as table (
pk_id int identity
,ColumnName varchar(max)
,ColumnDataType varchar(max)
)
insert into
#tempStructure
select
COLUMN_NAME
,DATA_TYPE
from
INFORMATION_SCHEMA.columns
where TABLE_NAME= #tab
EXEC(#execution)
declare #ColumnCount int = (SELECT count(*) from #tempStructure)
declare #counter int = 1
while #counter <= #ColumnCount
BEGIN
IF #counter = 1
BEGIN
set #query = (SELECT ColumnName + ' ' + ColumnDataType FROM #tempStructure where pk_id= #counter)
END
IF #counter <> 1
BEGIN
set #query = #query + (SELECT ',' + ColumnName + ' ' + ColumnDataType FROM #tempStructure where #counter = pk_id)
END
set #counter = #counter + 1
END
END
When you execute the SP, you'll now get a return of the structure of the table you want.
This should hopefully get you moving.
If you want the table CONTENTS included, create yourself a loop for the entries, and append them to the #query parameter.
Remember to delimit the #query, else when you read it later on, you will not be able to restructure your table.
First of all you have to understand that you can't just store the value of a SELECTon a table in simple variable. It has to be TABLE variable which can store the value of a SELECTquery.
Try the below:
select 'name1' name, 12 age
into MyTable
union select 'name2', 15 union
select 'name3', 19
--declaring the table variable and selecting out of it..
declare #QueryResult table(name varchar(30), age int)
insert #QueryResult exec DisplayTable 'MyTable'
select * from #QueryResult
Hope this helps!
Related
I have table like this:
Table Name|Number of columns
How to dynamically create temporary tables inside stored procedure with names from first table, and variable columns named e.g. col1, col2, etc..
I also need to insert values to them and make another logic on them.
Example:
Table1|3
Table1(col1 nvarchar(max), col2 nvarchar(max), col3 nvarchar(max))
You will need to use dynamic sql like below:
declare #counter int = 1
declare #numberOfCols int = 3 -- OR you can use ->(select numberofcolumns from firsttable)
declare #dynamic nvarchar(max) = ''
declare #sql nvarchar(max) = 'CREATE TABLE #TEMP (';
while #counter <= #numberofCols
begin
set #dynamic = #dynamic + 'col'+cast(#counter as nvarchar(5))+' nvarchar(max) ';
if(#counter <> #numberOfCols)
begin
set #dynamic = #dynamic + ', ';
end
set #counter = #counter + 1
end
set #sql = #sql + #dynamic + ') select * from #temp'
select #sql
EXECUTE sp_executesql #sql
I have created a stored procedure regarding your question. I wish it can help you.
ALTER PROCEDURE P_ProcedureName
#NumberOfColumns INT=2 --expected 1 or more column
AS
DECLARE #SQLString VARCHAR(MAX)=''
DECLARE #Seq INT=2
IF #NumberOfColumns=0
BEGIN
SELECT 'Please add valid number of column'
RETURN
END
CREATE TABLE #Table
(
Id INT NOT NULL IDENTITY(1,1)
,Column1 VARCHAR(MAX)
)
WHILE #Seq<=#NumberOfColumns
BEGIN
SET #SQLString=#SQLString+'ALTER TABLE #Table ADD Column'+CAST(#Seq AS VARCHAR)+' VARCHAR(MAX)'+char(13)
PRINT(#SQLString)
SET #Seq +=1
END
EXEC(#SQLString)
SELECT * FROM #Table
GO
P_ProcedureName 5
I want to write a stored procedure that takes #FirmId as a parameter and I will use the related table according to this parameter.
What I want to obtain (but I don't want to use) is something like that:
CREATE PROCEDURE spFirmDetailGetByFirmId
#FirmId AS INT
AS
BEGIN
IF #FirmId = 1
SELECT * FROM Firm1
ELSE IF #FirmId = 2
SELECT * FROM Firm2
.
.
.
.
ELSE IF #FirmId = 1000
SELECT * FROM Firm1000
END
And also I don't want to create query string and then EXEC it, something like that in the fallowing code block. Because the real query is too complex and it will be very hard to manage if I use this option.
CREATE PROCEDURE spFirmDetailGetByFirmId
#FirmId AS INT
AS
BEGIN
DECLARE #Query AS NVARCHAR(MAX) = 'SELECT * FROM Firm'
SET #Query = #Query + CAST(#FirmId AS NVARCHAR(10))
EXEC(#Query)
END
Is there any other option?
Thanks.
I take your Yes the tables are identical and will be kept identical to suggest two approaches:
DECLARE #Firm VARCHAR(10)='Firm3';
SELECT * FROM Firm1 WHERE #Firm='Firm1'
UNION ALL
SELECT * FROM Firm2 WHERE #Firm='Firm2'
UNION ALL
SELECT * FROM Firm3 WHERE #Firm='Firm3'
[...]
UNION ALL
SELECT * FROM Firm1000 WHERE #Firm='Firm1000'
The second is:
DECLARE #query NVARCHAR(MAX)='SELECT * FROM ####';
SET #query=REPLACE(#query,'####',#Firm);
EXEC (#query)
The second could be used with a VIEW (in place of the #query), where you could read the VIEW's definition into the variable and create an ALTER VIEW-statement dynamically... Your procedure would call the same VIEW (but this would crash with parallel calls!)
This code can by use in a stored procedure to automatic create the view, every time you need to add columns
declare #tableId int
declare #columns varchar(max)
declare #tablesCount int
declare #tableName varchar(255)
declare #query varchar(255)
declare #id int
declare #result nvarchar(max)
set #columns = ''
set #tableName = 'Firm'
set #id = 1
set #result = ''
--Base table
select #tableId = object_id from sys.tables where name =#tableName
--Count how many table with the 'same name'
select #tablesCount= count(*) from sys.tables where name like #tableName+'%'
--Build Columns to add in the view
select #columns =#columns+name+', 'from Sys.columns where object_id = #tableId
--Drop View
set #result = 'Drop view vw_'+#tableName
exec sp_executesql #result
set #result=''
while(#id<=#tablesCount)
Begin
declare #idVarchar varchar(10)
set #idVarchar = cast(#id as varchar(10))
set #result =#result+'Select '+#columns+#idVarchar+' as FirmId from '+#tableName+#idVarchar
+'
Union all
'
set #id =#id+1
End
set #result = substring(#result, 1, len(#result)-12)
set #result='Create view vw_'+#tableName+' as
'+#result
exec sp_executesql #result
There is a another choice to this, you can also use sp_helpText to get the current definition of the view and append only add new table identifier
I want to sum up values from several databases. At this moment I have three databases: SPA_PROD, SPB_PROD and SPC_PROD.
My SQL query:
IF EXISTS (SELECT *
FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[TESTSUM]')
AND TYPE IN (N'P',N'PC'))
DROP PROCEDURE [dbo].[TESTSUM]
GO
CREATE PROC TESTSUM
AS
BEGIN
DECLARE #dbName SYSNAME,
#ObjectSUM INT,
#d datetime
SET #d = '20141113'
DECLARE #SQL NVARCHAR(MAX)
DECLARE #DBObjectStats TABLE (
--DBName SYSNAME,
DBObjects INT)
DECLARE curAllDBs CURSOR FOR
SELECT name
FROM MASTER.dbo.sysdatabases
WHERE name like '%PROD'
ORDER BY name
OPEN curAllDBs
FETCH curAllDBs INTO #dbName
WHILE (##FETCH_STATUS = 0) -- db loop
BEGIN
--SQL QUERY
SET #SQL = 'select #dbObjects = sum(doctotal) from ' +
QuoteName(#dbName) + '..Invoice
where DocDate = ''' + cast(#d as varchar(25)) + ''''
PRINT #SQL -- Debugging
EXEC sp_executesql #SQL, N'#dbObjects int output',
#dbObjects = #ObjectSUM output
INSERT #DBObjectStats
SELECT #ObjecSUM
FETCH curAllDBs INTO #dbName
END
CLOSE curAllDBs
DEALLOCATE curAllDBs
-- Return results
SELECT sum(DBObjects) [InvoiceSUM] FROM #DBObjectStats
END
GO
-- Execute stored procedure
EXEC TESTSUM
GO
And this work perfect and giving me right sum from all my DBs: 120 000$ ( 25 000 from SPA_PROD , 95 000 SPC_PROD and 0 (NULL) from SPB_PROD.
What I want to do:
I would like to parametrize, which allows me to choose date and databases. For example I want to choose SPA_PROD and SPB_PROD with date 2014-01-01 in another case I want all databases (SPA + SPB + SPC with another date.
Is this even possible? Any ideas?
I can use everything what gives me SQL Server 2012 and T-SQL. Maybe this technology offers me easiest way to do this.
I am also using SAP Crystal Reports to convert SQL output into a beautiful report.
Sorry for my English and I tried to describe to you my problem as far as I could. If you want any additional information which helps u to help me -> ask me :).
You can create a User-Defined Table Type:
CREATE TYPE DBTable AS TABLE
(
DBName VARCHAR(128)
);
You can use it as an input parameter of your stored procedure. As well as the date parameter.
CREATE PROCEDURE TESTSUM
#Databases DBTable READONLY
,#Date DATETIME
AS
BEGIN
...
...
...
You call it like this:
DECLARE #T AS DBTable;
DECLARE #D AS DATETIME = GETDATE();
INSERT INTO #T VALUES ('DB1', 'DB2', 'DB3')
EXEC TESTSUM #T, #D
maybe instead of
SELECT name
FROM MASTER.dbo.sysdatabases
use
SELECT name
FROM #temptable
and insert into #temptable specific db you want
Using your example I modified it to accept a string of database names (generated through you crystal reports select action). Then passing this string with the date in question to first validate the database exist and if online add the required union clause to the generated SQL code.
CREATE PROCEDURE TESTSUM
#DbNameS NVARCHAR(max)
,#Date DATETIME
AS
BEGIN
DECLARE #SQL NVARCHAR(MAX) = ''
/* ADD EXTRA ',' RO STRING ARRAY OF DATABASES */
SET #DbNameS = #DbNameS + ',';
DECLARE #L INT = LEN(#DbNameS);
DECLARE #D INT = 0;
DECLARE #LD INT = 1;
DECLARE #DBF VARCHAR(50);
DECLARE #ACTIVE INT = 0;
/* START SQL QUERY */
SET #SQL = 'SELECT SUM([InvoiceSUM]) AS [InvoiceSUM] FROM ( SELECT '''' AS DB, 0.00 AS [InvoiceSUM]' + CHAR(13)
/* LOOP THROUGH EACH DBF NAME PASSED CHECKING IF VALID AND ONLINE */
WHILE #D < #L
BEGIN
SET #D = CHARINDEX(',', #DbNameS,#LD);
IF #LD != #D
BEGIN
SET #DBF = SUBSTRING(#DbNameS,#LD,#D-#LD)
/* VALIDATE DBF IS VALID AND ACTIVE */
SELECT #ACTIVE = COUNT(*) FROM SYS.databases WHERE name = #DBF AND [state] = 0
IF #ACTIVE = 1
BEGIN
/*
BEGIN CODE TO UNION THE SUM RESULTS FOR EACH ACTIVE AND VALID DBF
TO MAKE IT WORK WITH SOME EXISTING DBF's ON MY SYSTEM I CHANGED THE SUMMARY CODE FOR TESTING
*/
SET #SQL = #SQL + 'UNION SELECT '''+ #DBF +''' AS DB, ISNULL(SUM( CAST(DVE AS DECIMAL(18,10)) ),0) AS [InvoiceSUM] FROM '+ #DBF + '.DBO.SO_MSTR WHERE CAST(RecordCreated AS DATE) = '''+ CAST(#Date AS VARCHAR(20)) + '''' + CHAR(13)
END;
END;
SET #LD = #D + 1;
END;
/* CLOSE OUT UNION SUMMARY QUERY */
SET #SQL = #SQL + ') AS DATA'
/* OUTPUT RESULTS */
EXEC SP_EXECUTESQL #SQL
END;
Crystal reports would effective be generating this code: EXEC TESTSUM 'SPA_PROD,SPB_PROD,SPC_PROD','12/09/2014'
I just had a random doubt while working with SQL-server to which i thought i could get it clarified here.
Say- i have a condition that i want to find out all the column names in the database which satisfy my where condition on data.
Example:-
There are some 20-30 tables in a SQL-Server DB.Now all i need is a query to find out the list of column names which have "Ritesh" as a data field in them.
I don't know if it is really possible in the first place.
I hope i am clear. Please, any help will be most appreciated.
Thank You.
Ritesh.
This should work, but be aware, this will take a while to execute in large databases. I have assumed that the search string might be just a part of the data contained and am using wildcards. I feel this is purely academic, as I am unable to imagine a scenario, where this will be required.
--you need to iterate the whole columns of entire table to find the matched record
--another thing is that you need dynamic sql to find the table name
DECLARE #Value varchar(50) --value for that find the column Name
SET #Value = 'Ritesh'
CREATE TABLE #Table
(
TableName Varchar(500),ColumnName Varchar(500),
Id int Identity(1,1) --use for iteration
)
CREATE TABLE #Results
(
TableName varchar(500),
ColumnName varchar(500)
)
INSERT INTO #Table
SELECT
TABLE_SCHEMA + '.' + TABLE_NAME AS TableNam,
Column_name AS ColumnName
FROM INFORMATION_SCHEMA.COLUMNS
WHERE Data_type IN ('char', 'nchar', 'varchar', 'nvarchar')
--change the datatype based on the datatype of sample data you provide
-- also remember to change the wildcard, if the input datatype is not a string
DECLARE #Count Int --total record to iterated
SET #Count = 0;
SELECT
#Count = COUNT(*)
FROM #Table
DECLARE #I int --initial value one to iterate
SET #I = 1;
DECLARE #TableName varchar(500)
SET #TableName = ''
DECLARE #ColumnName varchar(500)
SET #ColumnName = ''
DECLARE #Str nvarchar(1000)
SET #Str = ''
DECLARE #param nvarchar(1000)
SET #param = ''
DECLARE #TableNameFound varchar(max)
SET #TableNameFound = ''
DECLARE #Found bit
SET #Found = 0;
WHILE #I<=#Count
BEGIN
SET #Found = 0;
SELECT
#TableName = TableName,
#ColumnName = ColumnName
FROM #Table
WHERE Id = #I;
SET #param = '#TableName varchar(500),#ColumnName varchar(500),#Value varchar(50),#TableNameFound varchar(max),#Found bit output'
SET #str = 'Select #Found=1 From ' + #TableName + ' where ' + #ColumnName + ' Like ' + '''' + '%' + #Value + '%' + ''''
-- here we are using tablename and actual value to find in table
EXEC sp_executesql #str,
#param,
#TableName,
#ColumnName,
#Value,
#TableNameFound,
#Found OUTPUT
IF #Found=1
BEGIN
INSERT INTO #Results (TableName, ColumnName)
SELECT
#TableName,
#ColumnName
END
--increment value of #I
SET #I = #I + 1;
END
--Display Results
SELECT * FROM #Results
--Clean Up
DROP TABLE #Table
DROP TABLE #Results
In a stored procedure I pass a table name as the input variable.
I want to return the number of rows of this table with that stored procedure.
I tried something like this but it did not work:
declare #maxRowCount bigint
exec('set '+ #maxRowCount + ' =(select COUNT(1) from ' + #tableName + ')')
This is SQL Server 2008.
You can try this
CREATE PROCEDURE dbo.sp_selectcount
#tablename NVARCHAR(200)
AS
DECLARE #cmd NVARCHAR (255)
SET #cmd = 'SELECT count(*) from ' + #tablename
EXEC sp_executesql #cmd
The following example should give you something to work with.
-- fully qualify your table name (this is probably an input value in your sproc?)
-- please note that I use system view master.sys.tables as an example table here
DECLARE #tablename NVARCHAR(MAX) = N'[master].[sys].[tables]';
-- build the sql statement that you will execute
DECLARE #sql NVARCHAR(MAX) = N'SELECT COUNT(*) FROM ' + #tablename;
-- create a variable to hold the number of rows later on
DECLARE #nrofrows BIGINT;
-- create a temp table to store the result of executing the sql statement
CREATE TABLE #temp (NrOfRows BIGINT);
-- insert the result of the execution of the sql statement into the temp table
INSERT INTO #temp
EXECUTE(#sql);
-- extract the number of rows from the temp table
SET #nrofrows = (SELECT NrOfRows FROM #temp);
-- check the result so you can test!
PRINT #nrofrows;
If you want good background information on dynamic SQL, check out Erland Sommarskogs article The Curse and Blessings of Dynamic SQL.
You should remove the quotes around #maxRowCount.
Try this:
declare #maxRowCount bigint
exec('set #maxRowCount =(select COUNT(*) from ' + #tableName + ')')
OR
exec('SELECT #maxRowCount = COUNT(*) from ' + #tableName)
Analysis:
With the query you tried, it will execute:
set blablabla = (select count(1) from MyTable)
By removing the quotes:
set #maxRowCount = (select count(*) from MyTable)
You can try this instead.
declare #maxRowCount bigint(5)
exec('SELECT COUNT(*) INTO #maxRowCount FROM ' + #tableName)