Backup DB with dynamic sql - want to substitute in dbname and disk file path

Question

Re: Backup DB with dynamic sql - want to substitute in dbname and disk file path
Hope I can explain this. Below is a small snippet of code. I want to set @SQLTemplate_TSQL once at the top of the script and then execute the SET @SQLCommand and sp_executesql in a loop that reads a list of databases. It all works, except for the
BACKUP DATABASE. Right now it evaluates when the SET @SQLTemplate_TSQL is evaluated. I want it to evaluate when it is executed. I want the DB_NAME() of the USE @dbname.
-- change @dbname and @dbbackuppath
DECLARE @SQLCommand NVARCHAR(MAX)
DECLARE @SQLTemplate_TSQL NVARCHAR(MAX)
DECLARE @dbname varchar(128) = 'Bank04'
-- one time setting of @SQLTemplate_TSQL
set @SQLTemplate_TSQL =
DECLARE @dbbackuppath varchar(128) = ''''d:\backups''''
IF RIGHT(@dbbackuppath, 1) <> ''''\''''
SET @dbbackuppath = @dbbackuppath + ''''\''''
SET @dbbackuppath = @dbbackuppath + DB_Name() + ''''.bak''''
PRINT @dbbackuppath
BACKUP DATABASE ' + DB_NAME() + ' to DISK=''' + QUOTENAME(@dbbackuppath, CHAR(39)) + '''
-- Execute this several times over different databases
SET @SQLCommand = '
USE ' + QUOTENAME(@dbname) + ';
EXEC(''' + @SQLTemplate_TSQL + ''') '
PRINT @SQLCommand
EXECUTE sp_executesql @SQLCommand

Answer 1

Here is a stripped down version of my code. Someone writes a script. I then take the script and seperate it by GO statement block. Each GO block gets its own row into the
#SQLTemplate_TSQL. I then replace single quote with 4 quotes and run it. Then I run against my list of databases. I am unable to get the BACKUP DATA base to work with this model.
Run scripts against multiple databases.sql
Do a FIND on "CHANGE THIS" to see the databases returned from the SELECT statement
DECLARE @DatabaseName varchar(128)
DECLARE @SQLCommand NVARCHAR(MAX)
DECLARE @SQLTemplate_Seq INT
DECLARE @SQLTemplate_OperationDesc NVARCHAR(128)
DECLARE @SQLTemplate_TSQL NVARCHAR(MAX)
DECLARE @SQLTemplate_Diagnostics INT
DECLARE @Note VARCHAR(500)
IF OBJECT_ID('tempdb..#SQLTemplate_TSQL') IS NOT NULL
DROP TABLE #SQLTemplate_TSQL
CREATE TABLE [dbo].[#SQLTemplate_TSQL](
[SQLTemplate_RecID] [int] Identity,
[SQLTemplate_ID] [int] NOT NULL,
[SQLTemplate_Seq] [int] NOT NULL,
[SQLTemplate_OperationDesc] [varchar](128) NOT NULL,
[SQLTemplate_TSQL] [varchar](max) NOT NULL,
[SQLTemplate_Diagnostics] [int] NOT NULL,
[SQLTemplate_Enabled] [int] NOT NULL)
DELETE FROM #SQLTemplate_TSQL WHERE SQLTemplate_Seq = 65
DECLARE @SeqID INT
SELECT @SeqID = MAX(SQLTemplate_ID) FROM #SQLTemplate_TSQL
SET @SeqID = ISNULL(@SeqID,0)
SET @SeqID = @SeqID + 1
INSERT INTO #SQLTemplate_TSQL VALUES(@SeqID ,65,@SeqID,'
SELECT * FROM ifs_config
',1,1)
SET @SeqID = @SeqID + 1
INSERT INTO #SQLTemplate_TSQL VALUES(@SeqID ,65,@SeqID,'
DECLARE @HistoryODS INT
SET @HistoryODS = 1
SELECT * FROM ifs_tablelist WHERE HistoryODS = @HistoryODS and Tablename like ''''%HIST%''''
',1,1)
-- Setup Cursor to Loop through each of the Prior Period databases
DECLARE db_cursor CURSOR FOR
SELECT [Database Name] --<<<<<<<< CHANGE THIS SELECT statement to select DBs >>>>>>
FROM v_ifs_PPODSDBInfo_Curr
WHERE [Database Frequency] <> 'CURRENT'
ORDER BY [Database Frequency], [Database Number]
OPEN db_cursor
FETCH NEXT FROM db_cursor INTO @DatabaseName
-- Loop through each of the databases
WHILE @@FETCH_STATUS = 0
BEGIN
-- Setup Cursor to Loop through each of the SQL Statements
DECLARE #SQLTemplate_TSQL_cursor CURSOR FOR
SELECT [SQLTemplate_TSQL], [SQLTemplate_OperationDesc], [SQLTemplate_Seq], [SQLTemplate_Diagnostics]
FROM #SQLTemplate_TSQL
WHERE [SQLTemplate_Enabled] = 1 AND SQLTemplate_Seq = 65
ORDER BY SQLTemplate_ID
OPEN #SQLTemplate_TSQL_cursor
FETCH NEXT FROM #SQLTemplate_TSQL_cursor INTO @SQLTemplate_TSQL, @SQLTemplate_OperationDesc, @SQLTemplate_Seq, @SQLTemplate_Diagnostics
-- Loop through each of the SQL statements
WHILE @@FETCH_STATUS = 0
BEGIN
SET @SQLCommand = '
USE ' + QUOTENAME(@Databasename) + ';
EXEC(''' + @SQLTemplate_TSQL + ''') '
EXECUTE sp_executesql @SQLCommand
FETCH NEXT FROM #SQLTemplate_TSQL_cursor INTO @SQLTemplate_TSQL, @SQLTemplate_OperationDesc, @SQLTemplate_Seq, @SQLTemplate_Diagnostics
END
CLOSE #SQLTemplate_TSQL_cursor
DEALLOCATE #SQLTemplate_TSQL_cursor
FETCH NEXT FROM db_cursor INTO @DatabaseName
END
CLOSE db_cursor
DEALLOCATE db_cursor