Generate insert statement with the data from another table dynamically - sql-server

Question

I would like to create the stored procedure and generate insert statement for the table dynamically. The input parameters for the stored procedure are supposed to be schema, table name, #col1, #col2, ..., #colN. This stored procedure is supposed to take 1 random record from another server and based on this record is supposed to generate INSERT statement. #col1, #col2, ..., #colN parameters are optional in case you would like to overwrite original value with the one you need.
The insert record is supposed to look like that:
INSERT INTO schema_name.table_name VALUES (
col1,
col2,
...,
colN)
VALUES (
COALESCE(#col1, 'col1_value'),
COALESCE(#col2, 'col2_value'),
...,
COALESCE(#colN, 'colN_value')
);
Currently I can not realize how to take the real data and put it to the statement. What I already did is:
CREATE PROCEDURE dbo.GenerateSampleDataInsertSP
#SchemaName VARCHAR(255),
#TableName VARCHAR(255)
AS
SET NOCOUNT ON;
DECLARE #sql VARCHAR(MAX) = '',
#columns VARCHAR(MAX) = '',
#columnsWithCoalesce VARCHAR(MAX) = '';
SELECT c.name
INTO #column
FROM sys.tables t
JOIN sys.schemas s ON s.schema_id = t.schema_id
JOIN sys.columns c ON c.object_id = t.object_id
JOIN sys.types tt ON c.system_type_id = tt.system_type_id
WHERE t.name = #TableName
AND s.name = #SchemaName
AND tt.name NOT IN ( 'timestamp' );
SET #columns = NULL;
SELECT #columns = ISNULL(#columns + ', ', '') + name
FROM #column;
SET #sql = 'SELECT TOP 1 ' + #columns + ' FROM AnotherDatabase.' + #SchemaName + '.' + #TableName + ' ORDER BY NEWID();';
SET #sql = 'INSERT INTO [' + #SchemaName + '].[' + #TableName + '] (' + #columns + ') VALUES ();';
SELECT #sql;
I do not care about ideal code or solution. I need result and that's it.
UPDATED:
-- Example #1
USE tempdb
GO
/*CREATE PROCEDURE dbo.GenerateSampleDataInsertSP ...*/
CREATE TABLE dbo.Employee (ID INT, EmployeeName VARCHAR(255));
INSERT INTO dbo.Employee VALUES (1, 'John Smith');
EXEC dbo.GenerateSampleDataInsertSP #SchemaName = 'dbo', #TableName = 'Employees';
------------------------ EXPECTED OUTPUT OF THE PROCEDURE (NOT THE ACTION, BUT PLAIN TEXT) ------------------
INSERT INTO dbo.Employee
(
ID,
EmployeeName
)
VALUES
(
COALESCE(#ID, '1'),
COALESCE(#EmployeeName, 'John Smith')
);
-- Example #2
USE tempdb
GO
/*CREATE PROCEDURE dbo.GenerateSampleDataInsertSP ...*/
CREATE TABLE dbo.Orders (ID INT, OrderNbr VARCHAR(10), OrderDate DATE, CustomerID ID);
INSERT INTO dbo.Orders VALUES (7, '12345678', GETDATE(), 1024);
EXEC dbo.GenerateSampleDataInsertSP #SchemaName = 'dbo', #TableName = 'Orders';
------------------------ EXPECTED OUTPUT OF THE PROCEDURE (NOT THE ACTION, BUT PLAIN TEXT) ------------------
INSERT INTO dbo.Orders
(
ID,
OrderNbr,
OrderDate,
CustomerId
)
VALUES
(
COALESCE(#ID, '7'),
COALESCE(#OrderNbr,'12345678'),
COALESCE(#OrderDate, '2015-07-05'),
COALESCE(#CustomerId, '1024')
);

Answer 1

Ok, I'll answer my own question. As I said that I do not care about the code beauty and performance, I just need the result so anyone who would provide more elegant solution would be accepted as solved solution. Here is the code:
CREATE PROCEDURE dbo.GenerateSampleDataInsertSP
#SchemaName VARCHAR(255),
#TableName VARCHAR(255)
AS
SET NOCOUNT ON;
IF EXISTS ( SELECT name
FROM tempdb.sys.tables
WHERE name LIKE '%##record%' )
BEGIN
DROP TABLE ##record;
END;
DECLARE #sql VARCHAR(MAX) = '',
#columns VARCHAR(MAX) = '',
#columnsWithCoalesce VARCHAR(MAX) = '';
SELECT c.name
INTO #column
FROM sys.tables t
JOIN sys.schemas s ON s.schema_id = t.schema_id
JOIN sys.columns c ON c.object_id = t.object_id
JOIN sys.types tt ON c.system_type_id = tt.system_type_id
WHERE t.name = #TableName
AND s.name = #SchemaName
AND tt.name NOT IN ( 'timestamp' );
SET #columns = NULL;
SELECT #columns = ISNULL(#columns + ', ', '') + name
FROM #column;
SET #sql = 'SELECT TOP 1 ' + #columns + ' INTO ##record FROM AnotherDataBase.' + #SchemaName + '.' + #TableName + ' ORDER BY NEWID();';
EXEC (#sql);
SET #sql = 'INSERT INTO [' + #SchemaName + '].[' + #TableName + '] (' + #columns + ') VALUES (';
DECLARE #columnsCur CURSOR, #ColumnName VARCHAR(255), #tmpValue VARCHAR(MAX), #sqlCommand nvarchar(1000);
SET #columnsCur = CURSOR FOR
SELECT name
FROM #column;
OPEN #columnsCur;
FETCH NEXT
FROM #columnsCur INTO #ColumnName;
WHILE ##FETCH_STATUS = 0
BEGIN
SET #sqlCommand = 'SELECT #value=CAST(' + #ColumnName + ' AS VARCHAR(MAX)) FROM ##record;'
EXECUTE sp_executesql #sqlCommand, N'#value VARCHAR(MAX) OUTPUT', #value=#tmpValue OUTPUT
SET #sql = #sql + 'COALESCE(#'+ #ColumnName +', ''' + #tmpValue + '''),';
FETCH NEXT
FROM #columnsCur INTO #ColumnName;
END;
CLOSE #columnsCur;
DEALLOCATE #columnsCur;
SET #sql = #sql + ');'
SET #sql = REPLACE(#sql, ',);', ');');
SELECT #sql;
GO