How to get Column value without knowing column name ? SQL Server - sql

Question

I have table name as #Table_Name
I have column value as #Value but don't have the column name (but that exist at 1st position and can be Seek_id or prov_id ...I have to compare my value with this id )
How can I compare that table column name value ?
I want something like
SELECT * FROM #Table_Name
WHERE Table.Column[1].Value = #Value
for example #Table_Name = bb_match and #Value = 6

Answer 1

Possible this be helpful for you -
Query:
IF OBJECT_ID (N'dbo.bb_match') IS NOT NULL
DROP TABLE dbo.bb_match
CREATE TABLE dbo.bb_match (seek_id INT, prov_id INT)
INSERT INTO dbo.bb_match (seek_id, prov_id)
VALUES (6, 1), (2, 6)
DECLARE
#ColumnID TINYINT
, #Value INT
, #TableName SYSNAME
, #SQL NVARCHAR(500)
SELECT
#ColumnID = 1
, #Value = 6
, #TableName = 'dbo.bb_match'
SELECT #SQL = 'SELECT * FROM ' + #TableName + ' WHERE [' + c.name + '] = ' + CAST(#Value AS NVARCHAR(MAX))
FROM sys.objects o WITH (NOWAIT)
JOIN sys.schemas s WITH (NOWAIT) ON o.[schema_id] = s.[schema_id]
JOIN sys.columns c WITH (NOWAIT) ON o.[object_id] = c.[object_id]
WHERE o.[type] = 'U' -- <-- only for tables columns
AND s.name + '.' + o.name = #TableName
AND c.column_id = #ColumnID
PRINT #SQL
EXEC sp_executesql #SQL
Shorter, but unsafe (sys.columns contains column_name for tables, views, procedures, ...):
SELECT #SQL = 'SELECT * FROM ' + #TableName + ' WHERE [' + c.name + '] = ' + CAST(#Value AS NVARCHAR(MAX))
FROM sys.columns c WITH (NOWAIT)
WHERE c.[object_id] = OBJECT_ID(#TableName)
AND c.column_id = #ColumnID
EXEC sys.sp_executesql #SQL
Output:
SELECT * FROM dbo.bb_match WHERE [seek_id] = 6
Results:
seek_id prov_id
----------- -----------
6 1

Answer 2

declare #sql varchar(MAX)
declare #tablename varchar(100) = 'MyTable' --add your table name here
declare #value varchar(100) = 'SomeValue' -- add your desired value hree
select #sql = 'SELECT * FROM ' + #tablename + ' WHERE '
+ name
+ ' = ''' + #value + ''''
from sys.columns where object_id = object_id(#tablename) and column_id = 1
exec (#sql)
There are three parts to this. First I'm declaring three strings. #sql is where I will build up the query, #tablename and #value are the table and search value to look in/for. I've put in the dummy values MyTable and SomeValue to show what I'm talking about
Next I build up the sql statement. The first line sets the string as SELECT * FROM MyTable WHERE
I then add in the column name by selecting Name from the SQL SERver system table sys.columns, filtering on the first column (column_id = 1) and the table name
The next step is to add the value we want to search for in the column.
Finally, EXEC(#sql) interprets the string as a command and runs it.