I am working on a project and I got stuck with a query in which I want to get the specific column name of a table whose value is "no."
I have a table with name subscription and it has four fields; id(integer), email(varchar), sms(varchar), phone(varchar) and my email, sms and phone field have values either 'yes' or 'no'.
Now I want to retrieve the name of only those columns which has a value 'no'.
I want to execute this query in mysql.
I have tried the following query which is returning me the complete row wherever there is even one occurence of 'no':
SELECT * FROM test.subscription WHERE 'no' IN (email,sms,phone);
Like i have these two rows now i want to select the column name where value='no' and id=1
How about something cheap and cheerful using a case statement like:
SELECT ID, 'ColName' = CASE
WHEN email = 'no' THEN 'email'
END,
'ColName2' = CASE
WHEN sms = 'no' THEN 'sms'
END,
'ColName3' = CASE
WHEN phone = 'no' THEN 'phone'
END
FROM subscription
where ID = 2
I cant put this as a comment because of less privileges, but if you are looking to search a value which is held by a table (could be any column) - you might check this SO post
Using the code from the same post -
DECLARE #Results TABLE(ColumnName nvarchar(370), ColumnValue nvarchar(3630))
DECLARE #SearchStr nvarchar(100)
DECLARE #TableName nvarchar(256), #ColumnName nvarchar(128), #SearchStr2 nvarchar(110)
SET #TableName = 'no'
SET #SearchStr2 = QUOTENAME('%' + 'no' + '%','''')
SET #ColumnName = ''
SET #TableName = '[test].[dbo].[subscription]'
WHILE (#TableName IS NOT NULL) AND (#ColumnName IS NOT NULL)
BEGIN
SET #ColumnName =
(
SELECT MIN(QUOTENAME(COLUMN_NAME))
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(#TableName, 2)
AND TABLE_NAME = PARSENAME(#TableName, 1)
AND DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar')
AND QUOTENAME(COLUMN_NAME) > #ColumnName
)
IF #ColumnName IS NOT NULL
BEGIN
INSERT INTO #Results
EXEC
(
'SELECT ''' + #TableName + '.' + #ColumnName + ''', LEFT(' + #ColumnName + ', 3630)
FROM ' + #TableName + ' (NOLOCK) ' +
' WHERE ' + #ColumnName + ' LIKE ' + #SearchStr2
)
END
END
SELECT ColumnName, ColumnValue FROM #Results
If i got the Question right, i think the following Query might work
SELECT *
FROM test.subscription
WHERE 1=1
and
(email = 'no'
or
email = 'no'
or
sms = 'no'
)
and id=(your values)
Related
I want to be able to merge duplicate records in 1 table, and update all child entities whose FK was the originalRecordId to the destinyRecordId. This could be done manually, but it would be a daunting task as the parent table could have 40+ relationships, and this has to be done in multiple parent tables. I am using EF 6 with code first.
I have been able to get all navigation properties using the following (credit goes to #zev-spits in this question):
public List<PropertyInfo> GetNavigationProperties(T entity)
{
var t = entity.GetType();
var elementType = ((IObjectContextAdapter)context).ObjectContext.CreateObjectSet<T>().EntitySet.ElementType;
return elementType.NavigationProperties.Select(np => entityType.GetProperty(np.Name)).ToList();
}
I have no idea where to go from here.
Is there a way to programmatically do this task? I would like to pass in a originalRecord and a destinyRecord, obtain all related entities of the originalRecord and update the FK with the destinyRecordId.
I finally took #mjwillis suggestion and resolved this directly in SQL Server with the following:
DECLARE #sql nvarchar (255);
DECLARE #refTableName varchar(255) = 'Opportunities'
DECLARE #refColName varchar(255) = 'Id'
DECLARE #refValue uniqueidentifier = '2a8a0f61-fe5c-4dd7-8e6d-00c8340333c4'
Deleted User Key
DECLARE #refNewValue uniqueidentifier = '99999999-9999-9999-9999-999999999999'
DECLARE RelatedTableCursor CURSOR
LOCAL STATIC READ_ONLY FORWARD_ONLY
FOR
SELECT
result.TableName,
result.ColumnName
FROM
(
SELECT
OBJECT_NAME(f.parent_object_id) AS TableName,
COL_NAME(fc.parent_object_id,fc.parent_column_id) AS ColumnName,
SCHEMA_NAME(o.SCHEMA_ID) ReferenceSchemaName,
OBJECT_NAME (f.referenced_object_id) AS ReferenceTableName,
COL_NAME(fc.referenced_object_id,fc.referenced_column_id) AS ReferenceColumnName
FROM sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id
INNER JOIN sys.objects AS o ON o.OBJECT_ID = fc.referenced_object_id
) result
WHERE
ReferenceTableName = #refTableName AND ReferenceColumnName = #refColName
OPEN RelatedTableCursor
WHILE 1 = 1
BEGIN
DECLARE #tableName varchar(255)
DECLARE #columnName varchar(255)
FETCH NEXT FROM RelatedTableCursor into #tableName, #columnName
IF ##fetch_status <> 0
BEGIN
BREAK
END
DECLARE #sql nvarchar (255);
SET #sql =
N'UPDATE [' + #tableName + '] ' +
'SET ' +
' [' + #columnName + '] = ''' + CONVERT(NVARCHAR(255), #refNewValue) + ''' ' +
'WHERE [' + #columnName + '] = ''' + CONVERT(NVARCHAR(255), #refValue) + ''' ';
-- Prevent some error (Duplicate record) that occurs when replace data in mapping table.
BEGIN TRY
-- exec sp_executesql #sql;
select #sql
END TRY
BEGIN CATCH
END CATCH
END
CLOSE RelatedTableCursor
DEALLOCATE RelatedTableCursor
SET #sql = 'DELETE FROM [' + #refTableName + '] WHERE ' + #refColName + ' = ''' + CONVERT(NVARCHAR(255), #refValue) + '''';
EXEC sp_executesql #sql;
I'm trying to write a stored procedure to search for a string in all tables of a SQL Server database. I was able to find a good stored procedure for this purpose
However I don't want to just put the #Tablenames manually, I want it to go to a table called Enums_Tables that has an ID, and use that ID as #Tablenames.
What I have being thinking to solve this:
I could write another stored procedure to select all Id's from Enums_Tables and execute the first stored procedure, like in here
I could also pass the parameter in C#, since I'm going to use it as a search textbox. But the ideal would be making a single stored procedure.
Could you please help me with this?
EDIT
Thanks to GPW I have been able to solve this problem. I also encountered problems with the collation, but I also solve it. Below is the final stored procedure.
USE [DynaForms]
GO
/****** Object: stored procedure [dbo].[SP_SearchTables] Script Date: 09/11/2017 14:59:15 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[SP_SearchTables]
--#Tablenames VARCHAR(500)
#SearchStr NVARCHAR(60)
,#GenerateSQLOnly Bit = 0
,#SchemaNames VARCHAR(500) ='%'
AS
/*
Parameters and usage
#Tablenames -- Provide a single table name or multiple table name with comma seperated.
If left blank , it will check for all the tables in the database
Provide wild card tables names with comma seperated
EX :'%tbl%,Dim%' -- This will search the table having names comtains "tbl" and starts with "Dim"
#SearchStr -- Provide the search string. Use the '%' to coin the search. Also can provide multiple search with comma seperated
EX : X%--- will give data staring with X
%X--- will give data ending with X
%X%--- will give data containig X
%X%,Y%--- will give data containig X or starting with Y
%X%,%,,% -- Use a double comma to search comma in the data
#GenerateSQLOnly -- Provide 1 if you only want to generate the SQL statements without seraching the database.
By default it is 0 and it will search.
##SchemaNames -- Provide a single Schema name or multiple Schema name with comma seperated.
If left blank , it will check for all the tables in the database
Provide wild card Schema names with comma seperated
EX :'%dbo%,Sales%' -- This will search the Schema having names comtains "dbo" and starts with "Sales"
Samples :
1. To search data in a table
EXEC SP_SearchTables #Tablenames = 'T1'
,#SearchStr = '%TEST%'
The above sample searches in table T1 with string containing TEST.
2. To search in a multiple table
EXEC SP_SearchTables #Tablenames = 'T2'
,#SearchStr = '%TEST%'
The above sample searches in tables T1 & T2 with string containing TEST.
3. To search in a all table
EXEC SP_SearchTables #Tablenames = '%'
,#SearchStr = '%TEST%'
The above sample searches in all table with string containing TEST.
4. Generate the SQL for the Select statements
EXEC SP_SearchTables #Tablenames = 'T1'
,#SearchStr = '%TEST%'
,#GenerateSQLOnly = 1
5. To Search in tables with specfic name
EXEC SP_SearchTables #Tablenames = '%T1%'
,#SearchStr = '%TEST%'
,#GenerateSQLOnly = 0
6. To Search in multiple tables with specfic names
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%TEST%'
,#GenerateSQLOnly = 0
7. To specify multiple search strings
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%TEST%,TEST1%,%TEST2'
,#GenerateSQLOnly = 0
8. To search comma itself in the tables use double comma ",,"
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%,,%'
,#GenerateSQLOnly = 0
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%with,,comma%'
,#GenerateSQLOnly = 0
9. To Search by SchemaName
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%,,%'
,#GenerateSQLOnly = 0
,#SchemaNames = '%dbo%,Sales%'
*/
SET NOCOUNT ON
DECLARE #MatchFound BIT
SELECT #MatchFound = 0
DECLARE #CheckTableNames Table
(
Schemaname sysname
,Tablename sysname
)
DECLARE #SearchStringTbl TABLE
(
SearchString VARCHAR(500)
)
DECLARE #SQLTbl TABLE
(
Tablename SYSNAME
,WHEREClause VARCHAR(MAX)
,SQLStatement VARCHAR(MAX)
,Execstatus BIT
)
DECLARE #SQL VARCHAR(MAX)
DECLARE #TableParamSQL VARCHAR(MAX)
DECLARE #SchemaParamSQL VARCHAR(MAX)
DECLARE #TblSQL VARCHAR(MAX)
DECLARE #tmpTblname sysname
DECLARE #ErrMsg VARCHAR(100)
/*
IF LTRIM(RTRIM(#Tablenames)) IN ('' ,'%')
BEGIN
INSERT INTO #CheckTableNames
SELECT Name
FROM sys.tables
END
ELSE
BEGIN
IF CHARINDEX(',',#Tablenames) > 0
SELECT #SQL = 'SELECT ''' + REPLACE(#Tablenames,',','''as TblName UNION SELECT ''') + ''''
ELSE
SELECT #SQL = 'SELECT ''' + #Tablenames + ''' as TblName '
SELECT #TblSQL = 'SELECT T.NAME
FROM SYS.TABLES T
JOIN (' + #SQL + ') tblsrc
ON T.name LIKE tblsrc.tblname '
INSERT INTO #CheckTableNames
EXEC(#TblSQL)
END
*/
--IF LTRIM(RTRIM(#Tablenames)) = ''
--BEGIN
-- SELECT #Tablenames = '%'
--END
IF LTRIM(RTRIM(#SchemaNames)) =''
BEGIN
SELECT #SchemaNames = '%'
END
--IF CHARINDEX(',',#Tablenames) > 0
-- SELECT #TableParamSQL = 'SELECT ''' + REPLACE(#Tablenames,',','''as TblName UNION SELECT ''') + ''''
--ELSE
-- SELECT #TableParamSQL = 'SELECT ''' + #Tablenames + ''' as TblName '
IF CHARINDEX(',',#SchemaNames) > 0
SELECT #SchemaParamSQL = 'SELECT ''' + REPLACE(#SchemaNames,',','''as SchemaName UNION SELECT ''') + ''''
ELSE
SELECT #SchemaParamSQL = 'SELECT ''' + #SchemaNames + ''' as SchemaName '
SELECT #TblSQL = 'SELECT SCh.NAME,T.NAME
FROM SYS.TABLES T
JOIN SYS.SCHEMAS SCh
ON SCh.SCHEMA_ID = T.SCHEMA_ID
INNER JOIN [DynaForms].[dbo].[Enums_Tables] et on
(et.Id = T.NAME COLLATE Latin1_General_CI_AS)'
INSERT INTO #CheckTableNames
(Schemaname,Tablename)
EXEC(#TblSQL)
IF NOT EXISTS(SELECT 1 FROM #CheckTableNames)
BEGIN
SELECT #ErrMsg = 'No tables are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
IF LTRIM(RTRIM(#SearchStr)) =''
BEGIN
SELECT #ErrMsg = 'Please specify the search string in #SearchStr Parameter'
PRINT #ErrMsg
RETURN
END
ELSE
BEGIN
SELECT #SearchStr = REPLACE(#SearchStr,',,,',',#DOUBLECOMMA#')
SELECT #SearchStr = REPLACE(#SearchStr,',,','#DOUBLECOMMA#')
SELECT #SearchStr = REPLACE(#SearchStr,'''','''''')
SELECT #SQL = 'SELECT ''' + REPLACE(#SearchStr,',','''as SearchString UNION SELECT ''') + ''''
INSERT INTO #SearchStringTbl
(SearchString)
EXEC(#SQL)
UPDATE #SearchStringTbl
SET SearchString = REPLACE(SearchString ,'#DOUBLECOMMA#',',')
END
INSERT INTO #SQLTbl
( Tablename,WHEREClause)
SELECT QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME),
(
SELECT '[' + SC.Name + ']' + ' LIKE ''' + REPLACE(SearchSTR.SearchString,'''','''''') + ''' OR ' + CHAR(10)
FROM SYS.columns SC
JOIN SYS.types STy
ON STy.system_type_id = SC.system_type_id
AND STy.user_type_id =SC.user_type_id
CROSS JOIN #SearchStringTbl SearchSTR
WHERE STY.name in ('varchar','char','nvarchar','nchar','text')
AND SC.object_id = ST.object_id
ORDER BY SC.name
FOR XML PATH('')
)
FROM SYS.tables ST
JOIN #CheckTableNames chktbls
ON chktbls.Tablename = ST.name
JOIN SYS.schemas SCh
ON ST.schema_id = SCh.schema_id
AND Sch.name = chktbls.Schemaname
WHERE ST.name <> 'SearchTMP'
GROUP BY ST.object_id, QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME) ;
UPDATE #SQLTbl
SET SQLStatement = 'SELECT * INTO SearchTMP FROM ' + Tablename + ' WHERE ' + substring(WHEREClause,1,len(WHEREClause)-5)
DELETE FROM #SQLTbl
WHERE WHEREClause IS NULL
WHILE EXISTS (SELECT 1 FROM #SQLTbl WHERE ISNULL(Execstatus ,0) = 0)
BEGIN
SELECT TOP 1 #tmpTblname = Tablename , #SQL = SQLStatement
FROM #SQLTbl
WHERE ISNULL(Execstatus ,0) = 0
IF #GenerateSQLOnly = 0
BEGIN
IF OBJECT_ID('SearchTMP','U') IS NOT NULL
DROP TABLE SearchTMP
EXEC (#SQL)
IF EXISTS(SELECT 1 FROM SearchTMP)
BEGIN
SELECT Tablename=#tmpTblname,* FROM SearchTMP
SELECT #MatchFound = 1
END
END
ELSE
BEGIN
PRINT REPLICATE('-',100)
PRINT #tmpTblname
PRINT REPLICATE('-',100)
PRINT replace(#SQL,'INTO SearchTMP','')
END
UPDATE #SQLTbl
SET Execstatus = 1
WHERE Tablename = #tmpTblname
END
IF #MatchFound = 0
BEGIN
SELECT #ErrMsg = 'No Matches are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
SET NOCOUNT OFF
Sorry in advance with the weird formatting, I can't put it more readable. I hope it helps someone. I also want to give credit to the onwer of the original stored procedure in here.
That stored procedure you linked to already has logic to check the table names in the database and populates a table variable with a list of tables to check. Just change this logic to Select from your ENUM_TABLES table instead. This could be based on an input parameter of #Id if you like...
In simple terms:
Remove the parameter #TableNames from the stored procedure
(optionally) replace the parameter with #ENUM_TABLE_ID or something
Change code in SP that looks like this:
IF LTRIM(RTRIM(#Tablenames)) = ''
/* Removed a load of lines looking at #TableNames...... */
....
SELECT #TblSQL = 'SELECT SCh.NAME,T.NAME
FROM SYS.TABLES T
JOIN SYS.SCHEMAS SCh
ON SCh.SCHEMA_ID = T.SCHEMA_ID
JOIN (' + #TableParamSQL + ') tblsrc
ON T.name LIKE tblsrc.tblname
JOIN (' + #SchemaParamSQL + ') schemasrc
ON SCh.name LIKE schemasrc.SchemaName
With something more like this:
SELECT #TblSQL = 'SELECT SCh.NAME,T.NAME
FROM SYS.TABLES T
JOIN SYS.SCHEMAS SCh
ON SCh.SCHEMA_ID = T.SCHEMA_ID
INNER JOIN ENUM_TABLES et on
(et.TABLENAME=T.NAME)
and (et.Id='+#ENUM_TABLE_ID+')'
And then I think it'll do what you want (lookup the list of tables from another table, based on an ID passed into the stored procedure)
(apologies for the slightly weird formatting of the SQL above; for some reason the SO markdown processor really didn't like that stuff, but it is hopefully readable. If anyone wants to try to edit this to improve it, be my guest.)
I have written a CTE which returns some columns
;WITH cteResult AS
(
SELECT distinct
I.CUSTOMER,
I.OFFICE,
I.Column1 + ' ' + I.Column2 AS ADDRESS,
I.POSTCODE AS ZIPCODE
FROM
MYTABLE I WITH (NOLOCK)
)
I am filtering the columns returned based on the condition given below:
SELECT
CUSTOMER,
OFFICE,
ADDRESS,
ZIPCODE
FROM
cteResult AS CR WITH (NOLOCK)
WHERE
(#pstrCustId IS NULL OR (CR.CUSTOMER = #pstrCustId))
AND
(#pstrAddress IS NULL OR (CR.ADDRESS = #pstrAddress))
AND
(#pstrPostcode IS NULL OR (CR.ZIPCODE = #pstrPostcode))
When I test this by replacing #pstrCustId='1234' in the above select query it returns result which include custIds other than
'1234' but when I comment "#pstrCustId IS NULL OR" part it returns correct result'i.e, only results with custId='1234'.
I have written a similar stored proc earlier but it worked fine. However, this particular SP does not.
Any suggestions.
Why would you want to return result with desired id OR if there is none specified?
Is something wrong with this?:
SELECT
CUSTOMER,
OFFICE,
ADDRESS,
ZIPCODE
FROM
cteResult AS CR WITH (NOLOCK)
WHERE
(CR.CUSTOMER = #pstrCustId)
Check that all variables are null when they don't have filter value and change your where clause:
WHERE
CR.CUSTOMER = ISNULL(#pstrCustId, CR.CUSTOMER)
AND
CR.ADDRESS = ISNULL(#pstrAddress, CR.ADDRESS)
AND
CR.ZIPCODE = ISNULL(#pstrPostcode, CR.ZIPCODE)
Perhaps you want to return everything if #pstrCustId is NULL.
In that case.
Use (as per previous answer)
if (#pstrCustId IS NULL)
BEGIN
SELECT distinct
I.CUSTOMER,
I.OFFICE,
I.Column1 + ' ' + I.Column2 AS ADDRESS,
I.POSTCODE AS ZIPCODE
FROM
MYTABLE I WITH (NOLOCK)
END
ELSE
BEGIN
SELECT distinct
I.CUSTOMER,
I.OFFICE,
I.Column1 + ' ' + I.Column2 AS ADDRESS,
I.POSTCODE AS ZIPCODE
FROM
MYTABLE I WITH (NOLOCK)
WHERE
(I.CUSTOMER = #pstrCustId)
END
Why not use Dynamic SQL? It would also help optimize the run time. First insert the result of the CTE into a temporary table, then a dynamic sql should do the trick.
;WITH cteResult as
(
SELECT DISTINCT
I.CUSTOMER,
I.OFFICE,
I.Column1 + ' ' + I.Column2 AS ADDRESS,
I.POSTCODE AS ZIPCODE
FROM
MYTABLE I WITH (NOLOCK)
)
SELECT * INTO #TempTable FROM cteResult A
SET #DynamicSQL = 'SELECT CUSTOMER, OFFICE, ADDRESS, ZIPCODE FROM #TempTable AS CR WITH (NOLOCK) WHERE 1 = 1
' + (CASE WHEN #pstrCustId IS NULL THEN '' ELSE ' AND CR.CUSTOMER = ''' + #pstrCustId END) + '''
' + (CASE WHEN #pstrAddress IS NULL THEN '' ELSE ' AND CR.ADDRESS = ''' + #pstrAddress END) + '''
' + (CASE WHEN #pstrPostcode IS NULL THEN '' ELSE ' AND CR.ZIPCODE = ''' + #pstrPostcode END) + ''''
EXEC SP_EXECUTESQL #DynamicSQL
I have a table that holds form details, the form num(identity column) and the 5 columns for the Questions Score.
My insert proc for the form is very basic:
ALTER PROC [dbo].[Insert_New_Form]
#questionOne int, #questionTwo int, #questionThree int,
#questionFour int, #questionFive Int as
begin
Insert into Questionire_Form values (
#questionOne, #questionTwo, #questionThree,
#questionFour, #questionFive)
end
and I hold an int call answer that it's value changes between radio button selection (scoring).
My question is, how do I write a procedure to insert all of the answers in one row, meaning at each click on "next" button the score for the specific answer will be inserted to the row at the specific column.
and how do I wirte the update procedure should I use chack again button to go through the form?
I am using MS SQL 2012
I hope the following code will help you
CREATE PROCEDURE add_Score
#userID INT
#questionNumber INT,
#score INT
AS
DECLARE #ColumnaName VARCHAR(100)
DECLARE #sql VARCHAR(1000)
SET #ColumnName =
( CASE #questionNumber
WHEN 1 THEN 'ColumnOne'
WHEN 2 THEN 'ColumnTwo'
WHEN 3 THEN 'ColumnThree'
WHEN 4 THEN 'ColumnFour'
END )
IF EXISTS(SELECT * FROM Questionire_Form WHERE UserID = #userID) THEN
BEGIN
SET #sql = 'UPDATE Questionire_Form SET ' + #ColumnName + ' = ' + #score + ' WHERE UserID = ' + #userID
END
ELSE
BEGIN
SET #sql = 'INSERT INTO Questionire_Form (UserID, ' + #ColumnName + ') VALUES(' + #userID + ', ' + #score + ')'
END
EXEC(#sql)
I want to PassColumn name as a paremeter in My SP
And if my tat column exists in first table (Batch_Master), want to fatch value from that column,
And if that column exists in my second table (GTIN_Master), want to fetch value from tat table column,
Each table have columns like..
Batch_Master (Batch_M_id, GTIN(primary key),....etc
GTIN_Master (GTIN (foreign key),..etc)
I have Batch_M_id, and column name as a parameter..
Note: column Name having random datatype, some time int or some time datetime etc
I Try followin SP
CREATE PROCEDURE dbo.StoredProcedure2
#columnName varchar(50),
#batchmId int
AS
if exists(select * from sys.columns
where Name = N'columnName' and Object_ID = Object_ID(NBatch_Master'))
begin
select #columnName from Batch_Master
end
else
begin
select #columnName
from GTIN_Master inner join Batch_Master
on GTIN_Master.GTIN = Batch_Master.GTIN
where Batch_M_id =#batchmId
end
RETURN
What you need when you do not know exactly the query structure you are going to execute, then you have to create a dynamic query, which is actually a form of templating queries.
CREATE PROCEDURE dbo.StoredProcedure2
#columnName varchar(50),
#batchmId int
AS
DECLARE #SQL1 AS VARCHAR(MAX)
DECLARE #SQL2 AS VARCHAR(MAX)
SET #SQL1 = 'select ' + #columnName + ' from Batch_Master'
SET #SQL1 = 'select ' + #columnName + '
from GTIN_Master inner join Batch_Master
on GTIN_Master.GTIN = Batch_Master.GTIN
where Batch_M_id =' + CONVERT(VARCHAR,#batchmId)
IF EXISTS(SELECT * FROM sys.columns WHERE Name = #columnName and Object_ID = Object_ID(N'Batch_Master'))
BEGIN
EXEC (#SQL1)
END
ELSE
BEGIN
EXEC (#SQL2)
END
The above will do what you want but is prone to errors. For instance what if the column passed in the parameter does not exist in the tables used in the second query? You should probably need to check for existence in the second case too.
DECLARE #SQL VARCHAR(MAX)
SET #SQL = 'select ' + #columnName + ' from Batch_Master'
EXECUTE(#SQL)
This SQL:
set nocount on
go
create table One (id int, name varchar(25))
go
create table Two (id int, value varchar(25))
go
insert into One values (1, 'Table One')
insert into Two values (1, 'Table Two')
go
create procedure sp_test_colname
#colname sysname
as
declare #sql nvarchar(2048)
if exists (select 1 from sys.columns where name = #colname and object_id = object_id(N'One'))
set #sql = 'select [' + #colname + '] from [One]'
else
if exists (select 1 from sys.columns where name = #colname and object_id = object_id(N'Two'))
set #sql = 'select [' + #colname + '] from [Two]'
if #sql <> ''
exec sp_executesql #sql
go
exec sp_test_colname 'name'
exec sp_test_colname 'value'
exec sp_test_colname 'somethingelse'
go
drop procedure sp_test_colname
drop table One, Two
Returns the following:
name
-------------------------
Table One
value
-------------------------
Table Two